Tag Archives: change

How NASA Scientists Are Turning L.A. into One Big Climate-Change Lab

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From airborne to chemicals to sunshine itself, measuring change in the West Coast’s biggest city. Ben Amstutz/Flickr Southern California’s Mount Wilson is a lonesome, hostile peak — prone to sudden rock falls, sometimes ringed by wildfire — that nevertheless has attracted some of the greatest minds in modern science. George Ellery Hale, one of the godfathers of astrophysics, founded the Mount Wilson Observatory in 1904 and divined that sunspots were magnetic. His acolyte Edwin Hubble used a huge telescope, dragged up by mule train, to prove the universe was expanding. Even Albert Einstein made a pilgrimage in the 1930s to hobnob with the astronomers (and suffered a terrible hair day, a photo shows). To keep reading, click here.

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How NASA Scientists Are Turning L.A. into One Big Climate-Change Lab

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#7: Fulcrum 20019-301 Battery-Operated LED Clip-On Task Light

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#7: Fulcrum 20019-301 Battery-Operated LED Clip-On Task Light

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A Snapshot of Drilling on a Park’s Margins

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A Snapshot of Drilling on a Park’s Margins

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Fracking to Unfold Under a Historic Farm

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Fracking to Unfold Under a Historic Farm

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Sea-level rise could be way, way worse than we already thought

Sea-level rise could be way, way worse than we already thought

Petrov Stanislav

Could your city look like this in 2100 (assuming it hasn’t

looked like this already

)?

It might be time to buy that dry suit you’ve had your eye on — or start saving up for a submersible.

“Glaciologists fear they may have seriously underestimated the potential for melting ice sheets to contribute to catastrophic sea-level rises in coming decades,” reports The Independent. Here’s more from NBC News:

Melting glaciers in Antarctica and Greenland may push up global sea levels more than 3 feet by the end of this century, according to a scientific poll of experts that brings a degree of clarity to a murky and controversial slice of climate science.

Such a rise in the seas would displace millions of people from low-lying countries such as Bangladesh, swamp atolls in the Pacific Ocean, cause dikes in Holland to fail, and cost coastal mega-cities from New York to Tokyo billions of dollars for construction of sea walls and other infrastructure to combat the tides.

“The consequences are horrible,” Jonathan Bamber, a glaciologist at the University of Bristol and a co-author of the study published Jan. 6 in the journal Nature Climate Change, told NBC News. …

The estimates are higher than the controversial figures in the 2007 report from the Intergovernmental Panel on Climate Change (IPCC) of up to 23 inches (59 centimeters) and higher than the unpublished estimates being prepared for the next IPCC report, said Bamber, who is a review editor for that document and has seen the estimates.

Add this to the growing pile of sobering sea-level studies, along with recent ones about how western Antarctica is warming three times faster than the rest of the world and polar ice sheets are melting three times faster than during the ’90s.

Oh, and that one about how historic sea-level rises have been linked to volcanic eruptions.

Lisa Hymas is senior editor at Grist. You can follow her on

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Sea-level rise could be way, way worse than we already thought

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Idiot misinterprets draft U.N. climate report, shares his idiocy with the world

Idiot misinterprets draft U.N. climate report, shares his idiocy with the world

Next September, the United Nations’ Intergovernmental Panel on Climate Change will release its fifth report compiling the scientific evidence of climate change. But, if you’re impatient, you can read it today, thanks to a buffoon associated with a buffoon-clogged website committed to undermining climate change. (We choose not to link to said site because fuck them.)

From The Guardian:

The fifth assessment report (AR5) by the Intergovernmental Panel on Climate Change, which is not due to be published in full until September 2013, was uploaded onto [yet another buffoon-clogged website] on Thursday and has since been mirrored elsewhere on the internet. Several scientists who helped to write the report have confirmed that the draft is genuine.

A little-known US-based climate sceptic called Alex Rawls, who had been accepted by the IPCC to be one of the report’s 800 expert reviewers, admitted to leaking the document.

As the Huffington Post puts it, this “raises questions about the process.” Um, yeah. I’d say. Hey, U.N.? Here’s a tip: Maybe don’t give review copies of important, complex documents to dingbat deniers. Go ahead and write that down; I’ll wait.

Here’s the fun part:

In a statement posted online, [Rawls] sought to justify the leak: “The addition of one single sentence [discussing the influence of cosmic rays on the earth’s climate] demands the release of the whole. That sentence is an astounding bit of honesty, a killing admission that completely undercuts the main premise and the main conclusion of the full report, revealing the fundamental dishonesty of the whole.”

Climate sceptics have heralded the sentence — which they interpret as meaning that cosmic rays could have a greater warming influence on the planet than mankind’s emissions — as “game-changing”.

Yes! Nice work, Mr. Rawls! That’s how science works: If you find even 20 words out of 100,000 that seem like they cast the evidence in a different light, then nothing else matters. Man, you just livened up the holiday party at [Idiot Climate Denier Website]’s offices, which are located in a garage behind an abandoned house somewhere in the low hills of post-Manhattan Project New Mexico, probably.

People who study science and respect the rigor of scientific analysis (hereafter, “scientists”) point out that Rawls is an idiot, and a biased one at that. Steve Sherwood, one of the report’s lead authors and a director of the Climate Change Research Center at the University of New South Wales, explains: “You could go and read those paragraphs yourself and the summary of it and see that we conclude exactly the opposite, that this cosmic ray effect that the paragraph is discussing appears to be negligible.” Moreover:

The leaked draft “summary for policymakers” contains a statement that appears to contradict the climate sceptics’ interpretation.

It says: “There is consistent evidence from observations of a net energy uptake of the earth system due to an imbalance in the energy budget. It is virtually certain that this is caused by human activities, primarily by the increase in CO2 concentrations. There is very high confidence that natural forcing contributes only a small fraction to this imbalance.”

By “virtually certain”, the scientists say they mean they are now 99% sure that man’s emissions are responsible. By comparison, in the IPCC’s last report, published in 2007, the scientists said they had a “very high confidence” — 90% sure — humans were principally responsible for causing the planet to warm.

If you’d like a thorough rebuttal of Rawls (which you would), see Skeptical Science’s outline of the minute role solar activity plays. Here’s the key graph:

Skeptical Science

Click to embiggen.

But, you know, we’ve seen this movie before. The prequel was called “Climategate.” Sketchy climate denier steals information, isolates something that he thinks (erroneously) proves his point, trumpets it loudly. How long will it be before Rawls is on Fox News? He will be on before Christmas. Before the end of Hannukah, probably.

The great irony of this huge coup for Rawls and [Terrible Site for Idiots] is that the main critique of the IPCC’s fifth report is that it’s likely to be too conservative in its estimates, leaving out, for example, the effects of thawing permafrost.

The full (very early draft!) report is available online. But if you go to a site hosting it, you likely earn that site money. And since most of the sites are of the [We Hate Science Because Derp] variety, I encourage you not to seek it out. Besides, the honorable Alex Rawls has already saved us the effort of reading the whole thing by isolating the only sentence that matters. And for that, statues will be built in his honor someday, on the barren plains that were once America’s bread basket, just outside the Thunderdome.

Philip Bump writes about the news for Gristmill. He also uses Twitter a whole lot.

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Polar ice sheets are melting three times faster than during the ’90s

Polar ice sheets are melting three times faster than during the ’90s

It’s worse than we thought.

From U.S. News and World Report:

All of Earth’s major polar ice sheets except one have been rapidly losing mass — several gigatonnes per year — since 1992, accounting for about 20 percent of global sea level rise, according to a new report by multiple experts.

Scientists say this is the “clearest evidence yet” of polar ice losses, with nearly two thirds of all ice loss coming from Greenland. The only region with an increasing ice mass is Eastern Antarctica; ice sheets in west Antarctica, Greenland, and the Antarctic peninsula are melting and have caused about a half inch global sea level rise since 1992. …

Between 1992 and 2011, Greenland lost 152 gigatonnes of ice, West Antarctica lost 65 gigatonnes, and the Antarctic Peninsula lost 20 gigatonnes. East Antarctica gained about 14 gigatonnes of ice. A gigatonne is 1 billion metric tons.

mark217

The Antarctic peninsula.

That’s a combined mass equal to about three times all biomass on the Earth. The half inch of ocean rise might also help explain the recent discovery that sea levels are increasing 60 percent faster than expected.

It gets a little worse still. From CNN:

Previous estimates of how much the Greenland and Antarctic ice sheets contributed to the current 3 millimeter-per-year rise in sea levels have varied widely, and the 2007 report of the United Nations’ Intergovernmental Panel on Climate Change left the question open.

While the 19-year average worked out to about 20% of the rise of the oceans, “for recent years it goes up to about 30 or 40%,” said Michiel van den Broeke, a professor of polar meteorology at Utrecht University in the Netherlands. The rest comes from thermal expansion — warmer water takes up more space.

According to the Associated Press, the Antarctic and Greenland ice sheets lost three times as much ice annually between 2005 and 2010 as during the 1990s.

The findings, released today, use the hot new tool in data analysis: averaging. Well, sort of. From The Washington Post:

The study by an international group of 47 experts who study satellite mapping data — led by Erik Ivins, a scientist at NASA’s Jet Propulsion Laboratory, and Andrew Shepherd, a professor of earth observation at the University of Leeds — is the first to pull together 50 different ice-sheet-loss estimates over two decades and reconcile the research methods and findings into a single report.

As a result, the new findings “are now two to three times more reliable” than ice-melt and sea-level-rise estimates in studies used by the Intergovernmental Panel on Climate Change to compile its most recent report in 2007, Shepherd said.

So in case you were hoping that the calculations were iffy: nope. They’re better.

We now present this new information, as acted out by Rachel Dratch.

Philip Bump writes about the news for Gristmill. He also uses Twitter a whole lot.

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Polar ice sheets are melting three times faster than during the ’90s

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