Replies to post #79885 on Tornado Alley (PROG)

[sideeki]

But how did all that happen in only 6,000 years?

[StephanieVanbryce]

Climate Loopholes

The House’s approval of the Waxman-Markey climate change bill earlier this month was a remarkable political achievement and an important beginning to the task of reducing greenhouse gas emissions. But in all the last-minute wheeling and dealing, the House bill acquired two big loopholes that the Senate must close.

The first loophole involves coal-fired power plants. Coal is the world’s most abundant fossil fuel — producing more than half the electricity in the United States — and also its dirtiest, with twice the carbon content of natural gas.

The House bill would limit emissions from coal-fired power plants in two ways. It imposes a cap on emissions from all industrial facilities that tightens slowly over time. It also sets tough performance standards on new power plants permitted after 2009, requiring emissions reductions of 50 percent or more. The bill would help underwrite advanced technologies capable of capturing carbon dioxide and storing it underground.

The bill does not, however, impose any performance standards on existing power plants. And it explicitly removes these plants from the reach of the Clean Air Act. This is a mistake. The overall cap on industrial emissions will not be fully effective for a long time, and, meanwhile, the government should be able to impose lower-emissions requirements on the older, dirtiest plants.

There is little doubt that the Clean Air Act authorizes the Environmental Protection Agency to require existing plants to reduce emissions by, say, using cleaner fuels or increasing efficiency. But the House bill says otherwise, at least when it comes to carbon dioxide. The Senate must fix this problem by writing standards for existing plants into its bill or restoring the E.P.A.’s authority to do so. The old plants simply cannot be let off the hook.

The second loophole involves the tricky matter of offsets. Offsets allow polluters who cannot immediately reduce their own emissions to get credit for reducing emissions elsewhere. A rich country can earn credits by helping a poor country save its rain forests. Domestically, a power company can earn credits by, say, helping farmers capture methane emitted by animal waste ponds or cultivate land in ways that help absorb carbon.

Offsets are an important cost containment mechanism since it is usually cheaper for a company to buy offsets in the near term and gain time to install the new technology necessary to eventually meet its targets. But they can be easily manipulated. Academic studies have found that many of the offsets purchased by industrialized countries under the Kyoto treaty turned out to be bogus or produced far less reductions than advertised.

This is a very real danger with some of the offsets in the House bill. For instance, the bill would allow polluters to meet their requirements not by paying farmers to put new conservation techniques in place but by paying them to keep doing things they were already doing. The result is that money changes hands, but the atmosphere is no better off. Offsets must be real and verifiable, or the integrity of the entire scheme is at risk.

There are risks here. The Senate has already rejected much weaker bills. But the political climate is more favorable now than it has ever been, and Senate Democrats should not settle for half-measures.

http://www.nytimes.com/2009/07/22/opinion/22wed11.html

[StephanieVanbryce]

Revealed: the secret evidence of global warming Bush tried to hide
Photos from US spy satellites declassified by the Obama White House provide the first graphic images of how the polar ice sheets are retreating in the summer. The effects on the world's weather, environments and wildlife could be devastating


Satellite images of polar ice sheets taken in July 2006 and July 2007 showing the retreating ice during the summer.

Graphic images that reveal the devastating impact of global warming in the Arctic have been released by the US military. The photographs, taken by spy satellites over the past decade, confirm that in recent years vast areas in high latitudes have lost their ice cover in summer months.

The pictures, kept secret by Washington during the presidency of George W Bush, were declassified by the White House last week. President Barack Obama is currently trying to galvanise Congress and the American public to take action to halt catastrophic climate change caused by rising levels of carbon dioxide in the atmosphere.

One particularly striking set of images - selected from the 1,000 photographs released - includes views of the Alaskan port of Barrow. One, taken in July 2006, shows sea ice still nestling close to the shore. A second image shows that by the following July the coastal waters were entirely ice-free.

The photographs demonstrate starkly how global warming is changing the Arctic. More than a million square kilometres of sea ice - a record loss - were missing in the summer of 2007 compared with the previous year.

Nor has this loss shown any sign of recovery. Ice cover for 2008 was almost as bad as for 2007, and this year levels look equally sparse.

"These are one-metre resolution images, which give you a big picture of the summertime Arctic," said Thorsten Markus of Nasa's Goddard Space Flight Centre. "This is the main reason why we are so thrilled about it. One-metre resolution is the dimension that's been missing."

Disappearing summer sea ice poses considerable dangers, scientists have warned. Ice shelves are used by animals such as polar bears as platforms for hunting seals and other sea creatures. Without them, they could starve. In addition, ice reflects solar radiation. Without that process, the Arctic sea could warm up even more. The phenomenon threatens to set off runaway heating of the planet, say climatologists.

The latest revelations have triggered warnings from scientists that they no longer have the funds to keep a comprehensive track of climate change. Last week the head of the US's National Oceanic and Atmospheric Administration (NOAA), Professor Jane Lubchenco, warned that the gathering of satellite data - crucial to predicting future climate changes - was now at "great risk" because America's ageing satellite fleet was not being replaced.

"Our primary focus is maintaining the continuity of climate observations, and those are at great risk right now because we don't have the resources to have satellites at the ready and taking the kinds of information that we need," said Lubchenco, who was appointed by Obama. "We are playing catch-up."

Even before her warning, scientists were saying that America, the world's scientific superpower, was virtually blinding itself to climate change by cutting funds to the environmental satellite programmes run by the Oceanic and Atmospheric Administration and Nasa. A report by the National Academy of Sciences this year warned that the environmental satellite network was at risk of collapse.

In February, a Nasa satellite carrying instruments to produce the first map of the Earth's carbon emissions crashed near Antarctica only three minutes after lift-off.

The satellite would have measured carbon emissions at 100,000 points around the planet every day, providing a wealth of data compared to the 100 or so fixed towers currently in operation in a land-based network.

The NOAA is under additional pressure to provide environmental data because of the re-emergence of the El Niño climate phenomenon, where warming of the tropical Pacific causes heatwaves, droughts and flooding around the world. June's land and sea surface temperatures were the second hottest on record, and scientists are predicting this will be the warmest decade in recorded history. The last major El Niño was in 1998, the hottest year in recorded history.

The Obama administration has already taken steps to tackle America's flagging scientific lead. The president's economic recovery plan allotted $170m (£100m) to help close the gaps in climate modelling. The NOAA is seeking an additional $390m in its 2010 budget to upgrade environmental satellites, and help make data more available to researchers and government officials.

http://www.guardian.co.uk/environment/2009/jul/26/climate-change-obama-administration