The audience was a veritable "who's who" in the field. For example, I've been a long-time reader of Judith Curry's Climate etc. blog and she's posted her own background material on the workshop, including links to the agenda and so on. Her post already has close to 300 comments so anyone interested in this field should take a look.
Tuesday, October 9, 2012
Royal Society Uncertainty Workshop
The audience was a veritable "who's who" in the field. For example, I've been a long-time reader of Judith Curry's Climate etc. blog and she's posted her own background material on the workshop, including links to the agenda and so on. Her post already has close to 300 comments so anyone interested in this field should take a look.
Sunday, October 7, 2012
If you can't stand the heat... keep away from the volcano
In these stunning pictures, fearless Geoff Mackley looks like a speck of tin foil next to the 1,150C molten pit raging inside the crater of a volcano…
At a distance of just 30 metres, one slip or a sudden surge of the bubbling lava and he would be instantly turned to ash…
The 46-year-old said: 'It looks like the surface of the sun, it’s like all my wildest dreams in one moment, it’s the most amazing thing I’ve ever seen or done…
After a 400-metre descent, Mr Mackley can be seen staring death in the face as he looks over the edge into the fiery abyss. The video also shows a large part of the volcano lake wall collapsing into the lava and instantly turning into smoke.
There is also a video:
Friday, October 5, 2012
Volcano Fever (Democratic Republic of the Congo’s Virunga National Park)
In the background was a volcano spewing a 200-meter tall fountain of lava. In the foreground was an AK-47 wielding soldier. My immediate reaction on seeing this photo was “I need to go there.”
I had much the same reaction when I saw my first photo of the dirtiest river in the world. If it weren’t so horrible, it could be art. It was so far outside the realm of my normal existence, getting to these places would become an obsession.
The Democratic Republic of the Congo’s Virunga National Park is a landscape in turmoil, like a “Hieronymus Bosch painting come alive”.
About 10 years ago, Nyiragongo Volcano erupted, flowing lava into the nearby city of Goma. It killed 47 people and left over 120,000 people homeless. It was the most destructive effusive eruption in modern history. It remains the most active volcano in Africa today.
National Geographic described Virunga as “the crown jewel of the African Parks” in part because it is one of the last homes of the nearly extinct Mountain Gorilla.
“The gorillas share the park with tens of thousands of heavily armed soldiers engaged in a three-way guerrilla war between two rival militias and the Congolese army. The park is also home to poachers and hordes of illegal charcoal producers, and it is bordered by subsistence farmers and vast refugee camps overflowing with families fleeing the bloodshed. Caught in this vortex of human misery, it would be a miracle if the animals remained unscathed.”
Brent Stirton’s famous photo of the assassinated silverback mountain gorilla in 2007.
My friend Kelly showed me the photo of the volcano on her phone. We met on a bus tour through east Africa and were in Rwanda. She was proposing that a group of us split off from the tour, jump over the border into the Congo and then catch up with the tour in Kenya. “Seriously, it’s right over there, we’re so close”.
I was chomping at the bit to go hiking and the webpage said the “steep five-hour hike up Nyiragongo is rewarded with heady vistas of the world’s largest lava lake”. It was one of National Geographic’s best trips of 2012 and routinely makes it to the top of “disaster tourism” lists, alongside places like Chernobyl (another obsession of mine).
We were put in contact with a Congolese fixer. On such notice, tourist visas into the Congo through the standard route from Rwanda were “simply not possible”. Instead, the fixer said that we could drive up to Uganda and try our luck at one of the smaller border crossings, such as Bunagana. Our own research suggested this might not be a good idea. The UK travel warning for the Democratic Republic of the Congo (DRC) says:
We advise against all travel to eastern and north eastern DRC. The only exception to this is within the towns of Goma and Bukavu, where we advise against all but essential travel…. Avoid entering or leaving DRC overland from Uganda, Rwanda or Burundi except via Goma or Bukavu. However, care should still be exercised at this crossing point.
To summarize, “do not go to the Congo, in particular the Eastern Congo, especially this small border crossing with Uganda”. It continues
The defection in April 2012 of certain members of the [army to the rebels] has resulted in heightened tension and an increase in fighting in North Kivu particularly …adjacent to Virunga National Park, and the border town of Bunagana…. In early July, [the rebel force] increased its presence in or near the town of Bunangana… resulting in an increase in violent incidents. There have been fire-fights within Goma…. There has also been an increase in the number of displaced people in the region and refugees crossing the border with Rwanda in Goma. Insecurity in eastern DRC has allowed other armed groups in the area to operate more freely.
It all seemed awfully specific. After reading the warnings, most others backed out of our plans.
As a forecaster, I was intrigued by the risk management side of it all. Aren’t these travel warnings like predictions? They are based on expert assessments of the situation but contain uncertainty. Consider this US state department warning:
Armed groups, bandits, and elements of the Congolese military remain security concerns in eastern and northeastern DRC. These armed groups… are known to pillage, steal vehicles, kidnap, rape, kill, and carry out military or paramilitary operations in which civilians are indiscriminately targeted. Travelers are frequently detained and questioned by poorly disciplined security forces at numerous official and unofficial roadblocks and border crossings throughout the country. Requests for bribes in such instances are extremely common, and security forces have occasionally injured or killed people who refuse to pay. In the past year, several U.S. citizens were illegally detained by government forces. Very poor infrastructure (road and air) makes the provision of consular services difficult outside of Kinshasa.
How frequently is “frequently”? How common is “extremely common”? Do 9 out of 10 travelers to the Congo have problems? Or is it more like 1 out of 100? If I had more quantitative information, couldn’t I make a better informed decision? Maybe not if you read this.
From Bunagana, we would take the back roads to the volcano. The fixer had heard of people going that route. The problem as we saw it though was that there were no back roads; Google Maps showed a large blank spot between Bunagana and the road leading south to the park. Google said you just can’t get there from here.
Instead of crossing from Rwanda to Congo at Goma (lower left), we were going to Kisoro in Uganda (upper right) and approach the volcano from the North. We were going to go along that short yellow finger of a road that seems to end (or does it?).
This was too much of a red-flag for everyone else and eventually it was just Kelly and me. The more dangerous it appeared, the more enthusiastic Kelly got. She had “volcano fever”. As a forecaster, I knew all the mental traps that lead people to ignore evidence and make bad decisions. I have had “flood fever” so I know what it looks like.
I knew the fixer had a vested interest in having us sign up for the tour (cash would be paid up front), so when he said “no worries, no problem” I pressed him for something more quantitative (e.g. “how many times have you done this before?”). Rather than accept the plan on emotion, I worked through a few contingencies. What happens if we are delayed at the border? What are the chances we could catch up with the tour? What are the costs if we are delayed?
This all went out the window when I found out that this region has the highest number of lightning strikes of anywhere in the world. Florida has the most lightning in the US. This part of the Congo has four times more lightning than Florida. Now that the weather hook was in, I was caught on the line.
NASA’s map of average lightning flashes per year per square kilometer . The volcano is in the white area surrounded by black. It is quite literally off the charts, having about 150 flashes per year.
We had a final meeting in the evening with our fixer at an open-air cafe in Rwanda. That evening the power was out because of wind gusts and heavy rains. He arrived late so we had time to wonder what the rain meant for the dirt roads. “No worries, no problem” he reassured “tomorrow night you sleep on the volcano.”
Wednesday, October 3, 2012
5 Favorite Travel Items
To commemorate a year of travel and 150 posts, I wrote a bit of advice on how to survive on and off) the road as well a few travel mottos. There are thousands of comprehensive webpages with around-the-world packing lists, but there a few gadgets I especially like. I have tried to emphasize what came to me as a surprise, rather than the standard advice (e.g. wear sandals instead of shoes, bring sunscreen, don’t pack too much, buy clothes as you go)…
For those in a hurry, they are: earplugs, adaptable powerstrip, phone/batteries/charger, plastic bags, and a shirt with a safety pocket.
1. Earplugs. I recommend a box of silicone earplugs for helping with sleep on airplanes, in hostels and in other places. A problem with travel is the ever-present noise pollution, from dripping faucets and rattling fans to others talking and rustling through their luggage. In Kathmandu, almost every hotel room is just above a street shrine where passersby tinkle a tinny bell after making an offering on their way to work.
The view from my Kathmandu room. The shrine is in the back, this is the outdoor ping-pong table that was in constant use. During all hours it was pa-tick-pa-tock-pa-tick-pa-tock…
As I write these very words (in Reading, England) my feet are vibrating from the thump of “music” from the bar below. Earplugs are small, cheap and disposable, they easily earn their place in your luggage. Good quality earplugs are hard to find in developing countries so buy a few boxes before you leave.
The putty-type earplugs (shown above) give a better seal and more comfortable than those made of foam.
2. Small multi-standard (universal) powerstrip. Airports and hotel rooms are stingy with power outlets so there is often a need to plug many devices into one socket. It is also good to have a long extension cord to allow you to work someplace comfortable rather than having to be leashed to the wall next to the fridge.
On one end of the device is a European 2-prong plug, which is the most compact and versatile of all the plugs (e.g. you can insert a European plug into an English socket but not the other way around). On the other end are outlets that can accept virtually any plug made. The below photo may look like it only has three outlets but there are potentially six (two devices plugged into each color).
I struggled to find the right name for this thing because I have never seen it for sale in a developed country, only in Africa and southeast Asia. I’ve Googled the company name and model number (“Heinz No: 017”) with no luck. I got the one in the photo for $1 in a street market in Rwanda. Since then I find it excruciating to pay $12.99 for an adapter or $20.99 for a powerstrip.
These devices have “safety” written all over them, literally.
Me think they protesteth too much though. I’ve had two of these and both died with a spark, crackle and a puff of blue smoke, like so:
Note burn mark in carpet
The universal plugs are extremely handy, however. It is frustrating when you realize “you can’t get there from here” with a certain combination of adapters and sockets.
Yes, this really has happened.
3. Unlocked smartphone, backup phone batteries and universal external battery charger. Never before have I been as attached to a device as I am to my Samsung Galaxy SII smartphone. It gives me email and Internet (even allowing laptops to connect through it), is a watch and alarm clock, plays games and music, has lots of books, tells me where I am and where I’m going, and has a better camera than most real cameras I’ve owned. I also occasionally use it as a phone.
“Unlocked” phones come without a service provider, so in each country I buy a new SIM card and get a local number. The wiki describing overseas phone plans is invaluable because it gives instructions for navigating the foreign language automated phone menus for most countries (e.g. “Select 1=Souscrire and then choose 1=Valider”). Surprisingly, pre-paid phone plans are disproportionately more expensive in Western countries, with the US costing twice any other country I went to. Mobile plans in Asia are cheap as chips.
The downside of my phone is its battery life. On a good day, I realistically get about 20 hours of charge. When I use GPS to record my track this goes down to as few as 4 hours. It helps to have spare batteries, especially since there isn’t always the opportunity to recharge each night. Extra batteries can be ordered inexpensively online (e.g. Ebay) before you travel.
It is useful to be able to charge two batteries at once. This can be done by plugging in the phone to the outlet, but also by using a universal external charger. Expensive in developed countries and available cheaply online, I found one in Indonesia for a few dollars. These chargers come in all shapes and sizes but the essential ingredients are an adjustable clamp to hold the battery in place and some movable prongs to make contact with the metal bits on your battery.
I signal a full battery by putting an elastic/hairband around it (right), otherwise I know it is dead and needs charging.
4. See-through plastic bags and a dry sack. Being so gadget-heavy, I dread being caught out in the rain. I can go without a raincoat, but I need something to keep the phone dry. This is why this blog has so few pictures of me getting caught out in wild weather.
In Australia, I spent too much money at a camping store buying a rubberized waterproof bag, the kind designed to keep items dry if a canoe capsizes. Much cheaper but slightly less durable are heavy-duty Ziploc bags. Plastic bags have the added advantage of being clear, meaning that you can see inside without opening the bag. If you are in a wet place, do not open your waterproof bag to check if your items are still dry. That is how things get wet.
Clear plastic bags are also good for organization. They are like folders in a filing cabinet or drawers in a dresser. They can also be stuffed, crushed flat and air-tight sealed, making your luggage more compact.
From left to right, notes from interviews, travel documents, and “junk drawer”. There are also bags for socks, for shirts and so on.
5. A synthetic long-sleeve shirt with a safety pocket. Despite what I said above about overpriced camping stores, I travel with two Mountain Hardwear Canyon long sleeve shirts. I have worn them in every climate, hot and cold, and they even look presentable for semi-formal occasions.
The lightweight and quick-drying material is soft yet indestructible, 70% nylon/30% polyester. When I was thrown head-first from a motorbike in the Philippines, my arms got a nasty road rash through my shirt, but the rolled-down sleeves themselves were completely fine. Meanwhile, my tibia was fractured and my pants were torn to pieces.
The handiest feature of this shirt is a vertical pocket on the chest, sealed with Velcro. This is hard to pick-pocket yet easy to access. It is more convenient than a money belt or security pouch. I do not understand why every shirt and jacket doesn’t have this pocket.
The pocket is the vertical slit just next to my scarf
Sunday, September 30, 2012
Hydrologic Oddities: Uphill Flowing Rivers
Water flows downhill under the influence of gravity and uphill under the influence of money. However, there was recently a case of the Mississippi River flowing backwards because of Hurricane Isaac on 28 August 2012.
The force of the Hurricane’s wind and storm surge piled up water at the mouth of the Mississippi. The force was so strong that it reversed the river’s flow, pushing water as far north as Baton Rouge. According to a US Geological Survey report, the storm made the river go backwards at 182,000 cubic feet per second (5,153 m^3/s), which is about as fast as it normally is going downstream.
Something similar happened during Hurricane Katrina. The river also did an about-face for a few hours during a major earthquake in 1812.
Friday, September 28, 2012
Tornado of Fire in Australia
The Daily Mail has an article about a video of a 30 meter high tornado in Australia. The tornado was made of fire and the most astonishing aspect was the duration of the event. Most such “fire devils” (as opposed to dust devils, which are small tornadoes that kick up dust) only last a few minutes, but this event lasted for over a half hour.
The Daily Mail page contains a gallery of images
The videographer describes the scene like so:
'The weather was perfectly still and it was about 25 degrees celsius - it was an entirely uneventful day.
'Then the next thing a man is yelling 'what the hell is that?' and I turned around and saw a 30-metre fire tornado.
'I was about 300-metres away and there was no wind but the tornado sounded like a fighter jet. My jaw just dropped.'
Mr Tangey, who runs Alice Springs Film and Television, in central Australia, described it as a 'once in ten lifetimes experience'….
If I had known what was about to happen then I would have happily paid $1,000 to watch it.”
Wednesday, September 26, 2012
Two New Google Crisis Response Webpages
In addition to their work during the Bangkok floods of 2011, the Google Crisis Response Team assisted during the recent flood disasters in the US and the Philippines.
The Tropical Storm Isaac map combined information about the path of the storm (past and future) with weather data and recovery resources (e.g. evacuation routes, locations of shelters). The map contained YouTube videos about the storm and high resolution repeat photography for long sections of the Gulf Coast.
The Philippines page includes a Person Finder. Users can either look for a certain person or contribute information about a person’s status. Similar to the other disasters, the Philippines page also showed maps of the flood extent and locations to get help.
Tuesday, September 25, 2012
10 Mottos for Travel and Life
As long as you look like you know where you are going, no one will ask any questions. It also helps to know where you are going.
Where you look is where you will go. For example, if you are riding a motorbike and keep your eyes on a tree, you will unconsciously steer towards the tree and hit it.
Get food, water and sleep. Even if you are in the middle of a disaster, do not unnecessarily deprive your basic needs otherwise you will get cranky. I have snacked while being robbed.
Do not assume that the laws in other countries (or even your own) make sense. Also, wild animals are unpredictable and do not think like you. Nature and customs officers do not care about your preconceived notions.
Do not lie to a group of strangers about your ability to play an unusual musical instrument (e.g. a didgeridoo or a banjo). Inevitably, someone will find one and ask you to give a performance.
The worst case scenario rarely happens. If it does, at least you will get a good story out of it. Unfortunately, the best case scenario is also rare.
Meet locals and accept hospitality when offered. Tourism is about new places, travel is about new people. My most rewarding experiences this year have involved home-cooked meals.
Set many small goals instead of a few giant goals. When it is all over, you do not want to feel you achieved nothing.
Go home before you feel you have to. Start your return journey before you get exhausted else you will not make it back.
Hold on tightly. Let go lightly...
Monday, September 24, 2012
An Earthquake Made the River Rise
When I think of earthquakes and rivers, I imagine the scene in the Superman movie where Lex Luthor’s bomb sets off an earthquake and ruptures Hoover Dam.
Dambreak scene from the 1978 Superman Movie.
Natural disasters can cause problems with the cracking of structures, but earthquake-induced total failures of dams are relatively rare. That said, there are accounts of earthquakes happening after the construction of dams. Large lakes filling put new stresses on the landscape until conditions reach a breaking point. The filling of Lake Mead/Hoover Dam caused earthquakes. As you can imagine, there are karmic cases of large dams causing large quakes that damage the dams themselves (e.g. Hsinfengkiang in China in 1962, and at Koyna, in India in 1967).
More interesting are the effects that earthquakes have on the natural flow of rivers, some of which can be long lasting. About 10 years ago, scientists Montgomery and Manga collected examples of earthquakes changing the water levels in wells and rivers. They found “Detectable streamflow changes occur in areas within tens to hundreds of kilometers of the epicenter, whereas changes in groundwater levels in wells can occur hundreds to thousands of kilometers from earthquake epicenters.” Manga also helped write a book chapter on changes in rivers after earthquakes and highlighted the case of a 1989 California earthquake that made rivers come up from 4 to 24 times their original size for a period lasting weeks to months.
In 2010 the colossal magnitude 8.8 earthquake happened in Chile. According to studies published this summer, initially the river levels dropped but then, hours to days later, the rivers as much as quadrupled their original size. The shaking of the soils redistributed the groundwater up towards the surface and fairly soon plants started accessing this water for transpiration causing a larger fluctuation in the river between night and day.
There are also short-lasting (i.e. minutes to hours) dramatic changes in river flow. In 1812, the Mississippi River ran backwards following a magnitude 7 quake in 1812. Boatmen were jolted awake in the middle of the night to find themselves being washed upstream “at the speed of the swiftest horse” and having to hold onto their hats to keep them from flying off. There were accounts of sudden large holes opening in mid-river as much as 10 meters/33 feet deep with water spilling vertically into them.
Saturday, September 22, 2012
Heat Hunting in Australia (My Hottest Day)
The announcement about the fall of Libya’s hottest temperature record got me remembering about some adventure climatology I did a few years ago in Australia. I wanted to find the exact hottest spot in the city on the hottest day of the year. Can you guess where it was and how hot it was? Here are some excerpts from 2 events. First, infamous Black Saturday (7 February 2009). At the time, few realized the extent of the wildfires going on around Melbourne but we could see plumes of smoke from our apartment and had ash on our windows:
“Today was quite a day. Melbourne finally broke the all-time all-year maximum temperature record, 115.5 F/46.4 C. 
At the height of the heat at about 3:40pm I grabbed my personal thermometer and ran outside to see if I could find the hottest surface temperature (the "skin" temperature, the surface of the ground as opposed to the air temperature a couple feet off the ground which is what you see above) around our neighborhood.
In grad school in Arizona we would run out and see if we could fry an egg on the sidewalk on the hottest day of the year. Turns out you can't. Sidewalks aren't that hot, you need something like an motor oil stained manhole cover or the metal hood of a black car. Even then the best you can get is over-easy, a little less than totally runny.
There's so many clichés about heat... But they were all true, when I walked out into the 5% humidity and 50 km/hr winds, it was like being blasted in the face by a pizza oven wrapped in a sauna nestled in a box of hair dryers... on a tin roof... in Hades... with the heat on. Anyhow my thermometer is made to measure liquids so it wasn't quite designed for the task, but here's the best I could do today...
145.5 F/63 C. Hot damn! It was right outside our door actually, in front of a construction site, it's a large thick metal slab out in the street and the hottest temperatures were right in the middle. Later on I started to think I could do even better on some of the tram tracks going down the middle of Toorak Street... but then a confused policeman came along and rousted me.
Later on we had blackouts in our apartment. And Christine remarked that this might be the first time she hasn't felt cold. But the heat was over in 10 minutes, as you can see when the winds and my first showers came through.”
Then there was this event from 11 January 2010:
Today looked like it was going to be a scorcher, so this morning I called in sick with a terrible "cold". Right around 4:30 when it appeared like the airport temperature had reached its peak (110 F, 43C), I donned my cashmere wool overcoat and hat and set out.
First stop was the tram rails at Chapel and Toorak. In theory, a great spot, but I think I'm going to give up on this one. I only had the thermometer down for half a minute before the cars at the stoplight started to honk.
Where the construction site was last year, there's a skyscraper now. On the first floor is the Outpost Cafe, a high end coffee place that has a fancy contraption that makes a cup of coffee, one drip at a time over about 4 hours.
Those black metal plates below the windows were just about perfect and they had been facing the sun all day. As I got closer I saw that a couple flies had foolishly landed on the wall and were burnt to a crisp on the spot!
And the verdict is...
165 F/ 74 C, blowing away my record last year by over 11 degrees C! In theory, that really is hot enough to cook an egg (>158 F, 70 C).
Friday, September 21, 2012
Dead Heat: The Toppling of the World’s Hottest Temperature Record
Last week forecaster Jan Null sent out an announcement about how Death Valley has moved up into the top spot of (officially recorded) hottest place on earth:
The World Meteorological Organization (WMO) has stripped Libya of their world hottest temperature record; set at El Azizia on September 13, 1922. The “new” world record hottest temperature is now the 134 set at Greenland Ranch in Death Valley, CA on July 13, 1913. Here’s the Press Release. It was the tireless efforts of Chris Burt, author of Extreme Weather and the Weather Historian for Weather Underground, that helped spur the [World Meteorological Organization] to reexamine and ultimately delete the El Azizia record.
A photograph of the trading post at El Azizia, Libya taken in 1923
The old record fell because it was on old-style thermometer (even by 1922 standards) and was likely misread by a new observer on his second day at work. It was a hot day, but the record did not seem plausible when compared to other nearby stations reporting at the same time.
Chris Burt has an interesting blog with personal accounts and original investigation into this and other weather extremes. The blog includes a compelling 25 minute detective story documentary about the El Azizia record with dramatic accounts of the disappearance of the Libyan chief climatologist during last year’s revolution. There are also announcements in USA Today and Reuters.
Note that this record is for the hottest official air temperature recorded by a thermometer. There are measurements of the exact hottest place on earth (70 C/160 F surface temperature in the Lut Desert outside Kerman, Iran) but that is of the temperature of the ground as sensed by a satellite. Read more about my trip to that Iranian desert and its vast hand-dug underground canals.
Monday, September 17, 2012
Forecasts At the Airport (a Case Against Knowing Uncertainty)
The departure board at London Gatwick airport currently lists all flights as being on time. Some of these are probably lies, and knowing lies at that.
When planes are delayed or cancelled, the passengers are only let in on this once there is virtual certainty that the flight will be off schedule. Even then, the passengers are updated through a slow creep in the numbers. First, a delay of five minutes is announced, then twenty and then…
When compared to what actually happens, these “predictions” are clearly biased. The forecasts are always too optimistic. Planes never leave earlier than the advertised times.
Someone in the airport (e.g. in the flight control tower) has unbiased information about when the planes will likely take off but there is a good reason to not give that data directly to the public.
Imagine a parallel universe without bias on the departure board, where half the planes leave early and half leave late. Passengers would check the board and perhaps some would decide they have enough time to get another coffee. It would be clearly upsetting to come back “on time” and discover the plane already left. People also get very mad when buses or trains run ahead of schedule.
A recent NYT article “The Weatherman Is Not a Moron” described the river-forecasting equivalent of such a catastrophic “missed the flight” scenario:
The Weather Service has struggled over the years with how much to let the public in on what it doesn’t exactly know. In April 1997, Grand Forks, N.D., was threatened by the flooding Red River … [The Weather Service] predicted that the Red would crest to 49 feet, close to the record…The waters, in fact, crested to 54 feet. It was well within the forecast’s margin of error, but enough to overcome the levees and spill more than two miles into the city… The Weather Service had explicitly avoided communicating the uncertainty in its forecast to the public, emphasizing only the 49-foot prediction. The forecasters later told researchers that they were afraid the public might lose confidence in the forecast if they had conveyed any uncertainty.
Times have changed….
Since [the Grand Forks flood], the National Weather Service has come to recognize the importance of communicating the uncertainty in its forecasts as completely as possible… “No forecast is complete without some description of that uncertainty.” [said Max Mayfield]
Still, just like how there are biases in flight departure times, there are biases in the weather forecasts:
In what may be the worst-kept secret in the business, numerous commercial weather forecasts are also biased toward forecasting more precipitation than will actually occur… For years, when the Weather Channel said there was a 20 percent chance of rain, it actually rained only about 5 percent of the time.
People don’t mind when a forecaster predicts rain and it turns out to be a nice day. But if it rains when it isn’t supposed to, they curse the weatherman for ruining their picnic. “If the forecast was objective, if it has zero bias in precipitation,” Bruce Rose, a former vice president for the Weather Channel, said, “we’d probably be in trouble.”
In flood forecasting, there seems to be a tolerance for false alarms. Occasionally crying wolf is not bad compared to letting the wolf in to make a big mess of everything (even if only once).
However, whose responsibility is it to make sure the wolf stays out? It is the airport’s responsibility to give good information to the passengers. It is the passenger’s responsibility to be at the gate on time. Similarly, the forecaster is not responsible for the flood damages, but he has a duty to provide good information to decision makers and the public. But don’t people with more information make better decisions? Is it fair to restrict what the public knows? Do more people catch their flights because they don’t know the whole story of what could happen?
Max Mayfield said in the NYT article that “No forecast is complete without some description of… uncertainty.” Scientists (myself included) are falling over themselves to come up with new and better ways of quantifying forecast uncertainty; this is one of today’s most active research topics in hydrology (and meteorology and climate change). There are stacks of reports going back more than thirty years saying that forecasts that communicate uncertainty have more value than forecasts that only give one number (the river will reach 52 feet).
Some of the more informative alternatives include a credible range (there is a 90% chance that the river will reach between 48 and 55 feet) or the chance of a relevant threshold (there is a 35% chance of the river going above the levees) or an ensemble (any of the following scenarios could happen: 48 feet, 49 feet, 51 feet, 54 feet…).
Imagine the confusion and frustration if the airport departure board listed ensembles:
London to Paris, possible departure times include 8:30, 8:32, 8:37, 8:40, 8:55.
It may be entirely true that there is a “90% chance this flight will leave between 8:30 and 8:45” but is this enough information to help the user make a decision? Although ensemble forecasts are technically feasible, river forecasters often feel like they are shirking their duties by asking users to wade through a mass of possible scenarios. Yet, scientists bristle at the idea of giving users only one number. “You can’t pick one number, because that depends on the risk tolerance of the user and every user is different.” What is a conservative forecast for one user is risky for another.
For example, my return flight to London has a tight connection. The board of departures says “what is the earliest possible time that the planes could leave?” I could plan better if I knew the latest possible time the flight could leave (or, say, the chances of being delayed by more than 15 minutes). I could decide for myself if that was an acceptable risk. I resent not knowing.
But I’m not going to get that information however. Why not?
It is partly because most people are terribly inexperienced at thinking about chances in their daily lives. Answer this question:
“I am 80% confident that the average distance between the centers of the earth and the moon is between ____ and ____ kilometers/miles.”
Try it. Write down your range. The answer is here.
So far, I have asked 40 scientists and operational forecasters to give their ranges. If people were good at quantifying their uncertainty then about 32 people (80%) would give ranges that contain the true distance. Instead, only 10 people (25%) have. This means that people (even those that predict for a living) give too narrow of a range and are overconfident in what they think they know.
Therefore, even if they were armed with the information “there is a 75% chance of the flight leaving in 10 minutes”, passengers would be largely unprepared to come up with the rest of the information necessary to make a good decision (e.g. in those 10 minutes, there is a 80% chance I could successfully get coffee, 90% chance of getting to the bathroom, 40% chance of getting both coffee and bathroom, and so on).
That said, with practice and feedback, people get better at sizing up risks. Once they learn that they are overconfident, people start to widen the range of their guesses. However, it takes some discipline to look back at past forecasts. Also, the feedback loop rarely closes in practice, especially if it is something that people do infrequently (e.g. navigate an unfamiliar airport, protect against an unprecedented flood).
But I’ll start the process by collecting my first data point. My flight was supposed to leave at 8:20. We touched off at 8:24. I probably wouldn’t have had time for another coffee.
Tuesday, September 11, 2012
The River Runs Red (Yangtze, China)
The Yangtze River at Chongqing has mysteriously turned scarlet this week.
Amused locals are collecting souvenir bottles of the tomato juice-colored water.
The contrast is greatest where the polluted Yangtze (left) meets the Jialin (right).
No one is sure why the river has changed color, but this is not the first time something like this has happened. When a dye producing company dumped stocks into the Jain river, the result was described as “hellish”.
Blood-colored water in a separate incident on the Jian River in the city of Luoyang.
Monday, September 10, 2012
US Drought Impacts: From Power to Popcorn
Last week I met Andreas Weigel, a climate analyst with Cargill (a multinational food producing and processing company) and when I asked him about the drought, the response was an animated mix of awe and fear. With droughts causing failures in both the Russian and US harvests, all eyes are trained on the rainfall in Brazil. The Russian drought cost 1.2 billion dollars in agriculture losses and the impacts in the US will be several times that. Just the uninsured damage to cracking house foundations is on the order of 1 billion dollars.
Weigel was at the European Center for Medium Range Weather Forecasts seminar on seasonal forecasting, along with the top scientists and other analysts (from energy companies, banks and relief agencies, among others). The skill of the weeks-to-months ahead forecasts is modest, but even the slightest signal can help with planning or give a competitive advantage.
It is hard to declare victory for this year’s forecasts (indeed Climate Central highlights their failures: “the sea surface temperature pattern “would suggest drought,” but … forecasters completely missed the scale and scope of the disaster that has been unfolding during the past few months.”)
How bad is it? The drought maps leak red like the US has taken a slug to the gut. By some measures (e.g. area-wise) it’s the largest US drought in 50 years. It has been described as a “silent tsunami” sweeping across the country.
What’s remarkable about drought is that it is so hard to picture. It is more about something not happening (the eerie silence of the grain processing plants, the stunted size of the crops), than something happening (torrents of water tumbling cars down a channel). It’s a creeping disaster that is easy to deny and slow to recover from. The fingers of the drought’s influence are likely touching your life, even overseas.
Some have said that there could be a shortage of popcorn. It is not like there will be empty shelves, but the quality will be lower and it will be more expensive. That said, popcorn has one of the highest markups of any product on the market. There are pennies worth of corn in a tub of movie popcorn- the box costs more than the product. Even then, what has ten times the markup of popcorn? Bottled water.
The rise in the price of corn will have a trickle down effect, perhaps making your monthly grocery bill about 20-30% more expensive. This will be magnified even further when it comes to prices of meat (because corn is used as animal feed). Right now farmers are selling off their animals in record numbers in anticipation of not being able to afford to feed them. The result is a lower price of meat in the short term because the supply is high, but the price will shoot up when those supplies run out.
The other major impact will be in energy production and prices. John Daly has some analysis at oilprice.com. From that article:
“virtually all power plants, whether they are nuclear, coal, or natural gas-fired, are completely dependent on water for cooling. Hydroelectric plants require continuous water flow to operate their turbines. Given the drought, many facilities are overheating and utilities are shutting them down or running their plants at lower capacity. Few Americans know (or up to this point have cared) that the country’s power plants account for about half of all the water used in the United States. For every gallon of residential water used in the average U.S. household, five times more is used to provide that home with electricity via hydropower turbines and fossil fuel power plants, roughly 40,000 gallons each month.”
“”In summer you often get a double whammy. People want their air-conditioning and drought gets worse. You have more demand for electricity and less water available to produce it. That is what we are seeing in the Midwest right now, power plants on the edge”… In July U.S. nuclear-power production hit its lowest seasonal levels in nine years as drought and heat forced Nuclear power plants from Ohio to Vermont to slow output.”
Friday, August 3, 2012
Five tips for traveling and living (150th post)
Fairly soon will be to the one year anniversary of starting traveling around the world. I began in August 2011 in Perth, Australia and last week I was in Perth, Scotland (hosted by river forecasters at the Scottish Environment Protection Agency). I gathered 43 new stamps in my passport, including for such places as Iran, Nepal and the Democratic Republic of the Congo.
Given that this is also the 150th post on this blog, it seems time to reflect on the experience of traveling. Before I started, I sought all kinds of advice on the Internet and from friends and family. Many people said much the same thing (e.g. every new traveler packs too much stuff). Some of the advice was contradictory (e.g. “don't put all your eggs in one basket” vs “sometimes you can only cross a river successfully with a running start”). I got myself in innumerable unfamiliar and unpredictable situations, but a few mantras saw me through. Even if you are not traveling, maybe these are still words to live by.
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When clean and dirty laundry mix, it all becomes dirty laundry.
In some contexts “dirty laundry” means secrets and things in one's personal life, but for traveling this is literally a good idea. I have a bad habit of mixing sorted items in with junk, making it all junk. Or I will organize my pack in the morning and then dump out its entire contents in the evening, only to have to organize it again the next morning. At work, I will clean up some data or edit some writing without marking what is finished or not. Similarly, I spend too much time re-reading old emails to see if there were any follow-up items I am missing. Mixing the bad in with the good leads to unnecessary re-evaluation of the good and less attention to the bad.
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Asking for what you want increases your chances of getting it.
People will stop and give you a ride if you stick out your thumb, more so than if you simply look forlorn in the rain by the side of the road. When you approach others, you also have more control over the interaction. Otherwise, you will be at the mercy of that “friendly stranger” who pounces just as you get off the plane/train/boat/bus; that person does not have your best interests in mind and should be avoided. Criminals will seek you out, but the random person you seek out for assistance is not likely to improvise some way of taking advantage of you. -
There is no use in continuing to worry about something until you have new information.
One time in India the first leg of my flight was canceled and the airline opted to hire a driver so I could make my connection in the next city. The drive was going to be four hours long but my next flight was leaving in three hours. If I missed the flight in the next city, there would be a cascade of problems following down the line. The driver understood the urgency and was tearing down rugged roads, weaving into oncoming traffic and at times riding with two wheels up on the sidewalk. Four hours is a very long time to stress and stew in my own juices, but there was nothing new I could do to affect the situation.Typical view from the back seat of a breakneck taxi ride.
Instead, I set a time after which I could start worrying again and briefly thought of a few conditions that would cause me to reconsider the plan (e.g. a car accident). I did not think of what to do after an accident happened, I only said I would have to reassess at that time what to do. I could have thought through contingencies A, B, C and so on, and continued to second guess the best course of action but it was going to be wasted effort. Instead I took in the scenery and thought of other things. Eventually, the ride took three and a half hours but I made the next flight because it was delayed (as one learns to expect in India). The moral is that problems of your life will not be resolved in your mind.
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Satisfice – pick the satisfactory and sufficient course of action.
A few days ago I missed the last train out of a city, it was getting dark and I did not have a room to stay in. Since I was going to take the first train out in the morning I did not want to pay much. I wandered around asking about prices and found they varied by about five British pounds. However, I spent an hour walking so my time was worth less than minimum wage.
When considering the costs, I should have taken into account the big picture- the price of the room, the value of my time, the effort of carrying my pack and so on. There were intangible benefits of getting exercise and seeing a relatively scenic part of town. But what was I giving up by continuing to shop around? What could have I been doing instead? Rather than finding the absolute best price I should have thought about what I was willing to pay, chose the first place that met that price, achieved closure and moved on. When I am indecisive, it is often because I am not being honest with myself about the true total costs and what I value. -
Always ask yourself “should I be in this line?”
This rule made it on “the list” after trying to make it to a connecting flight in a Chinese airport. The signage was poor and I just assumed I should follow the others and get in any line I encountered. The longer the line, the more I thought I should be in it. I waited in customs lines I didn't have to, declared currency under the reporting limit, went to the wrong terminal, left security and had to come back in, lined up for domestic when I was going international, lined up for international when going domestic, queued up for the ladies bathroom, and so on.
Now I handle lines by first asking what the line is for and then investing a few seconds to find the fastest lane to be in. Despite my “satisfice” advice above, people too often go to the first lane they find, not bothering to discover the distant unused lanes at the ends. Knowing this, some people do purposefully go to those end lanes, so my strategy is to pick the second to the last lane. Also, I see how many officers are serving a queue- some lanes in passport control have one officer, a few have two in series, meaning that line will go twice as fast. The same applies for picking the line at the grocery or going through a toll booth on a road. There are good reasons why you should not switch lanes mid-wait, best explained by this video:
Know sometimes though that the Bureaucracy is just out to mess with you. I once waited in a line at a Mexico border only to be told I needed something from another counter. When I got to the front of the next line I was greeted by the same person asking “how can I help you?”
If you enjoyed this, please feel free to share your own travel mantras in the comments below.
Monday, July 23, 2012
Are All Disasters a Conspiracy? (Russian Floods)
Earlier this month a flood in the Black Sea region of Krymsk struck in the middle of the night killing close to 200 people. Nearly a foot of rain fell in the mountains and a 20 foot tall wall of water rose in the cities in 15 minutes. Yesterday, Krymsk’s mayor, its district leader and the local emergency services chief were taken into custody for failing to warn the victims. I include background on the issue and some discussion at the end.
Man surveys flood damage in a home
A Russian Federation government report on reliefweb.int gives extensive facts and figures of the disaster and response (e.g. “Emergency psychological aid has been provided in… 11,351 cases”) but vivid narratives can be found in the New York Times:
“Lyudmila Dmitriyevna, 64, said she awoke early Saturday to the sound of voices, stepping onto her third-floor balcony and peering into the gloom.
“It was as if I were looking at a stream of clay,” she said. “It was so loud, there were people screaming in the water, and metal barrels, and animals. It boiled and boiled, it covered the streets and the yards, it was all you could see.”
Like many residents interviewed, she said she suspected that the raging flow was a result of an official decision to release some water from a swollen reservoir in the hills above the city — a theory rebutted by scientists from Russia’s environmental monitoring service, who said Friday’s rains swelled nearby rivers with the equivalent of six months’ average precipitation.
But those explanations, like the overtures of officials, have done little to win back Ms. Dmitriyevna’s trust. “Putin came, Tkachev came, the mayor came,” she said. “They deny everything. They are protecting their own interests. Why would they protect ordinary people?”
Her husband then took her by the hand and pulled her away from a reporter, saying that if she gave her full name, “they’ll take you out and shoot you.”
The Times also reported:
Survivors erupted in angry shouts when they learned, during a conversation with Gov. Aleksandr Tkachev, that officials received warning of the danger three hours before the wave hit, but had made no attempt to evacuate sleeping residents.
At the time, Mr. Tkachev — an ally of President Vladimir V. Putin — responded sarcastically to the notion that officials should have taken any action, addressing the hecklers as “my dears.”
“What, are you saying we should have gone to everyone?” he said as he struggled to be heard over the angry responses, according to video of the meeting. “That’s impossible. First of all, with what resources? Secondly, what would you have done — just stood up and left your houses?”
The frustration of the residents comes through in quotes from The Guardian:
"No one told us anything," said one woman standing at the city administration building, who asked not to be named. "Our officials say the dam had nothing to do with it, but everyone here knows otherwise."
A spokesman for the prosecutor general's investigative committee said the reservoir was not involved in the intense flooding. Local prosecutors earlier admitted the gates had been opened, but it was too early to say if that caused the flooding. Nearby towns were untouched….
Many if the dead were elderly. Loskutova described how she saved her 76-year-old mother: "I was screaming, 'Mama mama!' The water came in so fast and hard, we could barely break through the windows. I prayed and screamed for her not to let go."
The two women climbed on top of furniture where they stood until the water almost reached the ceiling, then finally they climbed through broken windows and on to the roof, she said.
"Then I sat with her, wet and naked, for 12 hours on the roof." No emergencies officials came, Loskutova said, and eventually her son arrived with a boat and ferried them to a hospital. "Are we not people?" she asked.
“When the whole life just floats away”
The International Herald Tribune has a good analysis of conspiracies around the idea that the reservoir purposefully released water to flood the town. Here is the text of a social media post fueling one of these theories
“Everyone is keeping quiet about this now, but last night my father was working and he says that they called an emergency meeting in the middle of the night to decide whether to open the floodgates of the Neberdzhaevskoye Reservoir,” Andropova wrote. “And what do you think? Of course they decided to open the floodgates! They sacrificed Krymsk and still didn’t manage to prevent the flooding of Novorossiysk. Good job. But at least they should have warned people the water was coming! Why didn’t they send the police ahead with warnings? Why didn’t they turn on the sirens so people would wake up? Now the stores are closed, we have no electricity or food. Krymsk is surrounded by troops, though there is no longer a Krymsk to speak of — just ruins. Many old people died. My friend’s parents have disappeared: they weren’t home when the rescue crews came, but they haven’t been found in the morgue either.”
Russian media has been contending that the reservoir couldn’t have caused the flood:
The dam of this reservoir is… located on the opposite side of Krymsk. Moreover, the emergency discharge of the reservoir is of a glory-hole spillway design which excludes the discharge of any considerable quantity of water.
The local authorities have reported that there was a discharge of water from the reservoirs, but whether they could have contributed to the flood in any considerable manner is a question that remains to be answered. However, the likelihood these reservoirs were in fact sources for the hundreds of thousands of tons of water that flooded Krymsk remains highly questionable on purely technical grounds.
The basin, located deep in the mountains, may have secured the town from total immersion, it appears. Waters levels in the reservoir jumped from 3 million to 8 million cubic meters overnight, so the storage worked as a “safety bag” for the city, securing it from an even worse flood, the Neberdzhaevsky press service says.
Moreover, “Krymsk was flooded much earlier than the reservoir started draining excessive water,” the press service told RIA Novosti. On Sunday the Investigative Committee confirmed that it does not consider a water discharge from the Neberdzhaevsky reservoir as the primary cause of the deluge…Local authorities insist that the true reason for the flood was the record level of precipitation in the region.
Anger was originally directed at the national government but Russian state media has deflected that back to the regional level:
The regional emergency services reported that local authorities had received weather warnings two days before the disaster. They also say the Emergencies Ministry sent out weather warnings by text message through mobile operators.
Pravda goes so far to say that provocateurs are deliberately spreading false information to undermine support for Putin:
Any cataclysm causes a great deal of rumors and the most controversial speculation. For example, victims of the earthquake in Armenia in 1988 sincerely believed that right before the shocks a silver plane appeared in the sky and something was dropped from it. This is a simple property of the human psyche - to try to explain blind violence of nature by human actions and find the cause that triggered the cataclysm. You cannot flog the ocean for drowning the ship.
The events in and around Krymsk go far beyond the standard reactions of shocked people to a disaster…Today, despite all rebuttals, despite the fact that an independent group from Krymsk has circled Neverdjayevskaya dam reservoir on an airplane, the attempts to fully refute the belief of the people that a wave was directed at them intentionally, have failed. People started talking about other reservoirs in the region from which the water could go to town. They began to look for other causes of flooding, understanding that the "Novorossiysk" theory had failed. Other theories included "drained water from the site of Grushevka Rosneft", "tried to save Putin's dacha in Praskoveevka," etc.
…On July 9 unidentified vehicles in the streets were announcing to the local residents that the second wave of floods was coming. Allegedly, the dam at the reservoir Neverdjayevskaya broke down and another multi-meter wave of water was approaching the city.
These "warnings" have generated a serious panic in the city, people rushed to the roofs of the houses, traffic jams emerged on the exits from Krymsk. Local authorities tried to calm the citizens down for hours, let the police cars on the streets urging people not to give in to provocations, explained that there was no second wave and the reservoir was fine.
Provocateurs were not found. In a dilapidated, panic-ridden city, the search and identification of criminals has become a real problem. However, the mere appearance of such "warning vehicles" is remarkable. It means only one thing - there is an organized group of provocateurs in Krymsk seeking to undermine the situation, politicize the disaster, and direct anger and frustration of people in the direction advantageous for the manipulators.
The Moscow Times puts a finer point on it (my emphasis added):
This is a well-known psychological phenomenon and very bad news for the authorities. It is common for victims of natural disasters to believe that they were victims of an evil plot of some sort. The famine of 1317 was blamed on Jews, and the black plague epidemic of 1347 was blamed on Jews and witches, who were subsequently burned at the stake.
This is bad news for the authorities because the people of Krymsk do not blame their troubles on Jews, witches, U.S. State Department, foreign agents or anti-government protesters. These once-steadfast supporters of Putin place the blame squarely on the Russian government.
The Christian Science Monitor also calls this a “familiar pattern”:
"There is a by now familiar pattern that repeats itself every time there's an accident," says Nikolai Petrov, an expert with the Carnegie Center in Moscow. "People blame officials, often with good reason, for failing to protect them. Central authorities look for someone on the local level to attach the fault to, and local officials squirm and lie to evade responsibility."
Is it true that victims of natural disasters often believe they were victims of an evil plot? The theme of “Flooded residents direct anger at reservoir operators” was one that I heard commonly this year, such as during the Queensland Floods and in the Manila Typhoons. I heard stories in the Philippines of citizens believing a dam was flooding their city, an idea easily refuted by looking on a map and noticing that the dam was over in the next valley and had no control over the local rivers.
Compare this headline “In terrorist attack, Putin destroyed whole town in Caucasus to save his Black Sea palace” with this story from Bangkok a few months ago “The king refused his palace to be protected from the flood, arguing that the water would just go around it, and it wouldn’t do any good to anybody else. No wonder they like the king here. But there is resentment in the outer provinces of Bangkok, about the suspicion that their neighbourhoods were sacrificed in order to save central Bangkok.” (read more about politics and floods in the US, Bangkok and Jakarta).
The IHT article touches on the central problem with muddling natural and man-made disasters:
“We shouldn’t be making up crimes where there were none,” Shultz added. “Especially since there are plenty of specific and true reasons to be mad at the regime.”
To a Russian, both versions of events are believable — except that a story imputing malice to the authorities is probably more plausible than a sudden natural disaster. We Russians no longer believe anyone who addresses us in the public sphere: the president, the television, the newspapers, the police or bloggers we don’t know personally.
Thus in addition to the tragedy of the people who died in Krymsk, there’s the tragedy of having no hope of ever knowing what really happened to them.
UPDATE: A new theory emerges…Is this also a part of the “familiar pattern”, that a scientist armed with data (measured from outer space, no less) would waltz into a messy and contentious politicized issue? From the financial times:
Lev Denisov, head of the Laboratory of Remote Sensing at the Institute of Geography of the Russian Academy of Sciences, has another theory which many experts say offers a more probable explanation. The flood’s force, he said, was caused by water being channelled through small openings in a raised highway south of the city.
Using photographs taken from the International Space Station, his team pieced together the path of the flood waters, which he said built up behind a 7m-high road embankment south of the town, as well as a raised railway, by late evening on July 6. The waters were held back by logjams of debris which temporarily clogged eight narrow bridge openings.
“When the pressure became too high, the debris clogs burst, unleashing this wall of water,” Mr Denisov told the FT.
He pointed out that the height of the wall of flood water was roughly similar to the height of the highway embankment – 7m – and dismissed the theory that the floods were caused intentionally….
Suren Gazaryan, an ecologist based in southern Russia who was one of the early champions of the artificial cause theory, announced last week on his blog that he had changed his mind. “I came to the conclusion that discharge of water from the Neberdzhaisk reservoir could not be a major cause of the flood, although residents [of Krymsk] adhere to this version,” he said. He said on twitter on Saturday that the highway construction was “an obvious reason” for the floods.





