"In a sustainable community, resource consumption is balanced by resources assimilated by the ecosystem. The sustainability of a community is largely determined by the web of resources providing its food, fiber, water, and energy needs and by the ability of natural systems to process its wastes. A community is unsustainable if it consumes resources faster than they can be renewed, produces more wastes than natural systems can process or relies upon distant sources for its basic needs."
Showing posts with label ice caps. Show all posts
Showing posts with label ice caps. Show all posts

Wednesday, January 29, 2014

If There's Global Warming ... Why Is It So Cold?

It's that time of year, the perennial "It's snowing so it can't be warming" season - or, as scientists call it, "winter". Depends on where you're standing, actually -- I stood on a frozen lake with Dr. Jeff Masters to discuss the current planetary changes, but at the same time, in Alaska, historic warm temperatures were unfolding, and across the west, the deepest drought in decades...

Saturday, September 28, 2013

Climate change? Try catastrophic climate breakdown

Already, a thousand blogs and columns insist the Intergovernmental Panel on Climate Change's new report is a rabid concoction of scare stories whose purpose is to destroy the global economy. But it is, in reality, highly conservative.

In other words, it's perhaps the biggest and most rigorous process of peer review conducted in any scientific field, at any point in human history.

There are no radical departures in this report from the previous assessment, published in 2007; just more evidence demonstrating the extent of global temperature rises, the melting of ice sheets and sea ice, the retreat of the glaciers, the rising and acidification of the oceans and the changes in weather patterns. The message is familiar and shattering: "It's as bad as we thought it was."

What the report describes, in its dry, meticulous language, is the collapse of the benign climate in which humans evolved and have prospered, and the loss of the conditions upon which many other lifeforms depend. Climate change and global warming are inadequate terms for what it reveals. The story it tells is of climate breakdown.

This is a catastrophe we are capable of foreseeing but incapable of imagining. It's a catastrophe we are singularly ill-equipped to prevent.

The IPCC's reports attract denial in all its forms: from a quiet turning away – the response of most people – to shrill disavowal. Despite – or perhaps because of – their rigours, the IPCC's reports attract a magnificent collection of conspiracy theories: the panel is trying to tax us back to the stone age or establish a Nazi/communist dictatorship in which we are herded into camps and forced to crochet our own bicycles. (And they call the scientists scaremongers …)

In the Mail, the Telegraph and the dusty basements of the internet, Friday's report (or a draft leaked a few weeks ago) has been trawled for any uncertainties that could be used to discredit. The panel reports that on every continent except Antarctica, man-made warming is likely to have made a substantial contribution to the surface temperature. So those who feel threatened by the evidence ignore the other continents and concentrate on Antarctica, as proof that climate change caused by fossil fuels can't be happening.

They make great play of the IPCC's acknowledgement that there

has been a "reduction in surface warming trend over the period

1998–2012", but somehow ignore the fact that the past decade

is still the warmest in the instrumental record.

They manage to overlook the panel's conclusion that this slowing of the trend is likely to have been caused by volcanic eruptions, fluctuations in solar radiation and natural variability in the planetary cycle.

Were it not for man-made global warming, these factors could have made the world significantly cooler over this period. That there has been a slight increase in temperature shows the power of the human contribution.

But denial is only part of the problem. More significant is the behaviour of powerful people who claim to accept the evidence. This week the former Irish president Mary Robinson added her voice to a call that some of us have been making for years: the only effective means of preventing climate breakdown is to leave fossil fuels in the ground. Press any minister on this matter in private and, in one way or another, they will concede the point. Yet no government will act on it.

As if to mark the publication of the new report, the Department for Business, Innovation and Skills has now plastered a giant poster across its ground-floor windows: "UK oil and gas: Energising Britain. £13.5bn is being invested in recovering UK oil and gas this year, more than any other industrial sector."

The message couldn't have been clearer if it had said "up yours". It is an example of the way in which all governments collaborate in the disaster they publicly bemoan. They sagely agree with the need to do something to avert the catastrophe the panel foresees, while promoting the industries that cause it.

It doesn't matter how many windmills or solar panels or nuclear plants you build if you are not simultaneously retiring fossil fuel production. We need a global programme whose purpose is to leave most coal and oil and gas reserves in the ground, while developing new sources of power and reducing the amazing amount of energy we waste.

But, far from doing so, governments everywhere are still seeking to squeeze every drop out of their own reserves, while trying to secure access to other people's. As more accessible reservoirs are emptied, energy companies exploit the remotest parts of the planet, bribing and bullying governments to allow them to break open unexploited places: from the deep ocean to the melting Arctic.

And the governments who let them do it weep sticky black tears over the state of the planet. More

 

Friday, September 20, 2013

Top 10 cities most at risk of natural disaster

Earthquakes, Floods, Storms, Tsunamis, Etc...

All the natural disasters in the news lately made us wonder what parts of the world were most threatened by things like floods & earthquakes. Massive reinsurer Swiss Re (a reinsurance company sells insurance to insurance companies, allowing them to offload some risks...) has a new report titled "Mind the risk: A global ranking of cities under threat from natural disasters" (pdf) that sheds some light on exactly that. Using their sophisticated modelling software and huge database of past events, they came up with a probabilistic ranking.

There are all kinds of ways to look at the data, but here are some of the most interesting variations.


Swiss Re/Screen capture
There are all kinds of ways to look at the data, but here are some of the most interesting variations.

 

Swiss Re/Screen capture

The list changes a bit if we look at it by "working days lost". More European and US cities appear on the top 10.

If we look at just earthquake risk, this is what the top 10 looks like for both people affected and working days lost: More

 

Thursday, September 12, 2013

Industrial Soot Linked to the Abrupt Retreat of 19th Century Glaciers

A NASA-led team of scientists has uncovered strong evidence that soot from a rapidly industrializing Europe caused the abrupt retreat of mountain glaciers in the European Alps that began in the 1860s, a period often thought of as the end of the Little Ice Age.

The research, published Sept. 3 in the Proceedings of the National Academy of Sciences, may help resolve a longstanding scientific debate.

In the decades following the 1850s, Europe underwent an economic and atmospheric transformation spurred by industrialization. The use of coal to heat homes and power transportation and industry in Western Europe began in earnest, spewing huge quantities of black carbon and other dark particles into the atmosphere.

Black carbon is the strongest sunlight-absorbing atmospheric particle. When these particles settle on the snow blanketing glaciers, they darken the snow surface, speeding its melting and exposing the underlying glacier ice to sunlight and warmer spring and summer air earlier in the year. This diminishing of the snow cover earlier in each year causes the glacier ice to melt faster and retreat.

The Little Ice Age, loosely defined as a cooler period between the 14th and 19th centuries, was marked by an expansion of mountain glaciers and a drop in temperatures in Europe of nearly 1.8 degrees Fahrenheit (1 degree Celsius). But glacier records show that between 1860 and 1930, while temperatures continued to drop, large valley glaciers in the Alps abruptly retreated by an average of nearly 0.6 mile (1 kilometer) to lengths not seen in the previous few hundred years. Glaciologists and climatologists have struggled to reconcile this apparent conflict between climate and glacier records.

"Something was missing from the equation," said Thomas Painter, a snow and ice scientist at NASA's Jet Propulsion Laboratory in Pasadena, Calif., who led the study. "Before now, most glaciologists believed the end of the Little Ice Age came in the mid-1800s when these glaciers retreated, and that the retreat was due to a natural climatic shift, distinct from the carbon dioxide-induced warming that came later in the 20th century. This result suggests that human influence on glaciers extends back to well before the industrial temperature increases."

To help the scientists understand what was driving the glacier retreat, Painter and his colleagues turned to history. The researchers studied data from ice cores drilled from high up on several European mountain glaciers to determine how much black carbon was in the atmosphere and snow when the Alps glaciers began to retreat. Using the levels of carbon particles trapped in the ice core layers, and taking into consideration modern observations of how pollutants are distributed in the Alps, they were able to estimate how much black carbon was deposited on glacial surfaces at lower elevations, where levels of black carbon tend to be highest.

The team then ran computer models of glacier behavior, starting with recorded weather conditions and adding the impact of the lower-elevation pollution. When this impact was included, the simulated glacier mass loss and timing finally were consistent with the historic record of glacial retreat, despite the cooling temperatures at that time.

"We must now look more closely at other regions on Earth, such as the Himalaya, to study the present-day impacts of black carbon on glaciers in these regions," said Georg Kaser, a study co-author from the University of Innsbruck, Austria, and lead author of the Working Group I Cryosphere chapter of the Intergovernmental Panel on Climate Change's upcoming Fifth Assessment Report.

"This study uncovers likely human fingerprints on our changing environment," said co-author Waleed Abdalati, director of the Cooperative Institute for Research and Environmental Sciences (CIRES) at the University of Colorado Boulder. "It's a reminder that the actions we take have far-reaching impacts on the environment in which we live."

CIRES is a joint institute of the university and the National Oceanic and Atmospheric Administration. Other institutions participating in the study include the University of Michigan - Ann Arbor and the University of California, Davis. The California Institute of Technology in Pasadena manages JPL for NASA. More

Black Soot and Snow, A Warmer Combination -- a report from the Goddard Institute for Space Studies

 

Wednesday, August 21, 2013

Al Gore explains why he’s optimistic about stopping global warming

Al Gore was vice president of the United States from 1993-2001. Since leaving politics, he’s been heavily involved in the campaign to fight global warming, even winning a Nobel Peace Prize for his efforts. And he says he’s more optimistic than ever that the issue has reached “a tipping point.” In this lightly edited interview transcript, he explains why.

Ezra Klein: In 2005, when “An Inconvenient Truth” came out, I remember that the hope was we could keep the carbon load in the atmosphere to 350 parts per million, and the fear was we would hit 400ppm. Now we’ve hit 400ppm and people are hoping to avoid 450ppm. This seems to be getting out of hand, and fast.

Al Gore: We have already crossed the 400 parts per million mark. We crossed it earlier this year. The question now is how high it will go before we begin bending the curve. But in spite of the continued released of 90 million tons of global warming pollution every day into the atmosphere, as if it’s an open sewer, we are now seeing the approach of a global political tipping point.

The appearance of more extreme and more frequent weather events has had a very profound impact on public opinion in countries throughout the world. You mentioned my movie back in the day. The single most common criticism from skeptics when the film came out focused on the animation showing ocean water flowing into the World Trade Center memorial site. Skeptics called that demagogic and absurd and irresponsible. It happened last October 29th, years ahead of schedule, and the impact of that and many, many other similar events here and around the world has really begun to create a profound shift.

A second factor is the sharp and unexpectedly steep decrease in prices for electricity produced from wind and solar and the demand destruction for fossil fuel energy from new efficiency improvements. The difference between 32 degrees fahrenheit and 33 degrees fahrenheit seems larger than just one degree. It’s the difference between water and ice. And by analogy there’s a similar difference between renewable electricity that’s more expensive than electricity from coal and renewable electricity that’s less expensive. And in quite a few countries in the world and some parts of the United States we’ve crossed that threshold and in the next few years we’re going to see that crossed in nations and regions containing most of the world’s population.

Another way to think about this is that back when mobile telephones first appeared, the market projections for how quickly they would increase market share turned out to be not just wrong but way wrong. This is a point made by Dave Roberts at Grist, but the projections made 5-10 years ago for the installation of solar and wind technologies were, similarly, not just wrong but way wrong. We’ve seen a dramatic increase that’s far more rapid than anybody projected and it’s accelerating — not just in the United States but even more rapidly in developing countries.

EK: Do the policy failures of the last decade put more pressure on technological advances to be the source of the solution?

AG: No, I seem them as intertwined. To some extent, the failure of policy at Copenhagen and before that in Washington has put more emphasis on the hopeful developments in technology, but as the conversation is won on global warming — and it’s not won yet but it’s very nearly won — the possibilities for policy changes once again open up.

We are seeing dramatic progress towards new policies in China, Korea, Ireland. We’ve seen a coal tax in India. We’ve seen changes in Australia, the largest coal producing nation. We’ve seen Mexico take a leadership position. We’ve seen action in California and other states. And some 17 other countries are in various stages of adopting either a cap and trade or carbon tax or both. If China follows through in its stated intention to move its cap-and-trade pilot program into a nationwide program in two years, then we’ll see a new center of gravity in the global energy marketplace that will accelerate the shift towards a market-based set of policies that will speed up the phase-out of coal-based electricity.

EK: Let me push back on your optimism here. To again use “An Inconvenient Truth” as a time marker, when that came out, Republicans in the Senate were still introducing bills to fight climate change through policies like cap-and-trade or cap-and-dividend. In 2008, there was a cap-and-trade plan in the McCain/Palin platform. In 2009, Waxman-Markey passed the House. But since then, Republican opposition has solidified, and cap-and-trade and carbon tax ideas seem completely off-the-table in American politics.

AG: Well, it’s not unusual to find big political shifts that take place beneath the surface before they’re visible above the surface. A lot of Republicans have shared with me privately their growing discomfort with the statements of some of the deniers in their ranks. Even though they’re not yet willing to come back to advocate constructive policies, there is definitely movement. You have now the formation of the first organized caucus in the Senate, with Sen. Sheldon Whitehouse joining with others in a hard-hitting effort.

But you see it at the local level a bit more than at the national level. You see these state initiatives and laws. And you see maybe the biggest shift of all in the business community. I think that in order to be competitive internationally we’ll have to make the shift towards a price on carbon. People are increasingly aware that we’re already paying the costs of carbon and so it makes sense to put a price on it.

EK: But to play the pessimist again, wouldn’t carbon prices in other countries give us a competitive advantage the longer we resist them at home? It seems that if India is taxing fossil fuels and we’re not, that’s a slight edge for us. It’s easy to imagine it becoming a kind of protectionist, save-our-manufacturing-sector issue.

AG: It’s certainly something that can’t be dismissed out of hand. But remember the World Trade Organization rules explicitly allow the recapture of carbon taxes at the border, much in the manner of a value-added tax. The U.S. is in danger if it did not change of being subjected to those recapture provisions. And as the cost curve for renewable electricity continues plunging, the low-cost electricity in the future will be renewables. At Apple, for example, 100 percent of its server farms and headquarters are on renewables, and they’re on the way to 100 percent for the company. Google is going down the same road. The pressure is only going to build as the price of renewable electricity continues to fall.

That’s even more true as the consequences to society and to the future of human civilization become ever more apparent to people. Once questions are resolved into a choice between right and wrong, then the laws change. It happened with civil rights. It’s happening now with gay rights. It happened with apartheid and, in an earlier era, with abolition. And this is now being resolved into a question of right and wrong.

EK: What do you think of the Obama administration’s intentions to push regulatory approaches to limiting carbon emissions?

AG: I’m very encouraged. I thought the president’s speech on climate was terrific and it followed the inspiring comments in his inaugural address and his post-election State of the Union. And remember the impact of policy direction on business calculations is forward-looking. When business begins to understand the direction of policy, they have to start adjusting to where the policy is going. When you look at the EPA process, it’s undeniably clear that there will be a price on carbon one way or the other. Then when you look at the movement in other countries and the states and local measures being enacted, the direction is now quite clear and businesses are making plans to adjust to it.

EK: You’ve moved from the world of politics to the world of technology. How has that changed your view of how much technology can do to solve this problem, and in particular, has it changed your view on various geoengineering schemes?

AG: Let me deal with the geoengineering part of your question first. That’s complex because there are some benign geoengineering proposals like white roofs or efforts to figure out a way to extract CO2 from the atmosphere , though no one has figured out how to do that yet. But the geoengineering options most often discussed, like putting sulfur dioxide into the atmosphere or orbiting tinfoil strips — these are simply nuts. We shouldn’t waste a lot of time talking about them. Some people will anyway, but they’re just crazy.

To the broader part of your question, innovation is already playing a major role in bringing about new potential solutions to the climate crisis. The tech world had a bitter experience after the burst of enthusiasm in 2005 and 2006 because of a perfect storm made up of four elements: First, the great recession, which had a huge, destructive impact on business generally. Number two, the Chinese juggernaut, which subsidized the production of several prominent renewable energy technologies to the point where their sales price fell below the price of production in the West. Third, the shale gas boom dropped the retail price of electricity to levels below what many renewable energy plans needed to be viable. And fourth there was the policy failure I mentioned earlier in the U.S. Senate and Copenhagen. And all the while there was this massively funded climate denier campaign by the Koch Brothers and Exxon-Mobile and others that hired tobacco industry veterans to work with them on consumer advertising and lobbying activities.

But that setback was only temporary because reality has a way of reasserting itself. There has been a 100-fold increase in the number of extreme, high-temperature events around the world in the distribution curve. And people have noticed for themselves — the rain storms are bigger, the droughts are deeper and the fires are more destructive. All of these things have not escaped notice and people are connecting the dots. The cumulative amount of energy trapped by manmade global warming pollution each day in the earth’s atmosphere is now equal to the energy that would be released by 400,000 Hiroshima bombs going off every 24 hours. It’s a big planet, but that’s a lot of energy.

The consequences are now hard to escape. Every night on the news, it’s like a nature hike through the book of revelations. Eleven states today are fighting 35 major fires! People are noticing this. And simultaneously they’re noticing the sharp drop in the cost of carbon-free, greenhouse gas-free energy, and the combination is pushing us over this political tipping point and the trend is unstoppable.

EK: What’s your response to people who say those events simply can’t be confidently connected to global warming?

AG: The leading scientists have in the last two years changed the way they discuss that particular connection. It’s true that it used to be common for them to say you can’t blame any single extreme weather event on global warming. What you had to say is the odds have shifted and those events are becoming more common and extreme. They’ve now changed their description of that connection. The temperature has increased globally and there’s now 4 percent more water vapor in the Earth’s atmosphere than 30 years ago. As a result, every extreme weather event now has a component of global warming in it.

If you look at superstorm Sandy on October 29th, the ocean water east of New Jersey was nine degrees fahrenheit above average. That’s what put so much more energy into that storm. That’s what put so much more water vapor into that storm. Would there be a storm anyway? Maybe so. Would there be hurricanes and floods and droughts without man-made global warming? Of course. But they’re stronger now. The extreme events are more extreme. The hurricane scale used to be 1-5 and now they’re adding a 6. The fingerprint of man-made global warming is all over these storms and extreme weather events.

EK: Give me the optimistic scenario on what happens next. If all goes well, what do the next few years look like on this issue?

AG: Well, I think the most important part of it is winning the conversation. I remember as a boy when the conversation on civil rights was won in the South. I remember a time when one of my friends made a racist joke and another said, hey man, we don’t go for that anymore. The same thing happened on apartheid. The same thing happened on the nuclear arms race with the freeze movement. The same thing happened in an earlier era with abolition. A few months ago, I saw an article about two gay men standing in line for pizza and some homophobe made an ugly comment about them holding hands and everyone else in line told them to shut up. We’re winning that conversation.

The conversation on global warming has been stalled because a shrinking group of denialists fly into a rage when it’s mentioned. It’s like a family with an alcoholic father who flies into a rage every time a subject is mentioned and so everybody avoids the elephant in the room to keep the peace. But the political climate is changing. Something like Chris Hayes’s excellent documentary on climate change wouldn’t have made it on TV a few years ago. And as I said, many Republicans who’re still timid on the issue are now openly embarrassed about the extreme deniers. The deniers are being hit politically. They’re being subjected to ridicule, which stings. The polling is going back up in favor of doing something on this issue. The ability of the raging deniers to stop progress is waning every single day.

When that conversation is won, you’ll see more measures at the local and state level and less resistance to what the EPA is doing. And slowly it will become popular to propose steps that go further and politicians that take the bit in their teeth get rewarded. I remember when the tide turned on smoking in public places. People thought the late Frank Lautenburg was crazy for proposing a ban on smoking in airplanes, but he was rewarded politically and then politicians began falling all over themselves to do the same. That’s the optimistic scenario. And it’s not just a scenario! It’s happening now! More