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Recent Changes in the Ventilation of the Southern Oceans

Wed, 2013-02-06 21:51 — Kathy Gilbeaux

sciencemag.org - Darryn W. Waugh1,Francois Primeau2,Tim DeVries3,Mark Holzer4 - February 1, 2013

Abstract

Surface westerly winds in the Southern Hemisphere have intensified over the past few decades, primarily in response to the formation of the Antarctic ozone hole, and there is intense debate on the impact of this on the ocean's circulation and uptake and redistribution of atmospheric gases. We used measurements of chlorofluorocarbon-12 (CFC-12) made in the southern oceans in the early 1990s and mid- to late 2000s to examine changes in ocean ventilation. Our analysis of the CFC-12 data reveals a decrease in the age of subtropical subantarctic mode waters and an increase in the age of circumpolar deep waters, suggesting that the formation of the Antarctic ozone hole has caused large-scale coherent changes in the ventilation of the southern oceans.

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Detecting Ozone- and Greenhouse Gas–Driven Wind Trends with Observational Data

Wed, 2013-02-06 21:00 — Kathy Gilbeaux

sciencemag.org - Sukyoung Lee1,Steven B. Feldstein1 - February 1, 2013

Abstract

Modeling studies suggest that Antarctic ozone depletion and, to a lesser degree, greenhouse gas (GHG) increase have caused the observed poleward shift in the westerly jet during the austral summer. Similar studies have not been performed previously with observational data because of difficulties in separating the two contributions. By applying a cluster analysis to daily ERA-Interim data, we found two 7- to 11-day wind clusters, one resembling the models' responses to GHG forcing and the other resembling ozone depletion. The trends in the clusters' frequency of occurrence indicate that the ozone contributed about 50% more than GHG toward the jet shift, supporting the modeling results. Moreover, tropical convection apparently plays an important role for the GHG-driven trend.

http://www.sciencemag.org/content/339/6119/563.abstract

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Major Storm Accelerated Arctic Sea Ice Loss, Study Finds

Mon, 2013-02-04 22:10 — Kathy Gilbeaux

climatecentral.org - by Andrew Freedman - February 1, 2013

(LINKS TO STUDY - LOCATED AT THE BOTTOM)

The "Great Arctic Cyclone of 2012," which struck the Arctic at the height of the sea ice melt season in early August, was not responsible for causing sea ice extent to plunge to a record low just a few weeks later. That is one of the conclusions of a new study published in the journal Geophysical Research Letters. It is the first study to quantify the impacts that the storm had on the fragile Arctic sea ice cover, which has been rapidly shrinking and thinning in response to rapid Arctic warming.

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Global Drought Monitor

Sun, 2013-01-27 14:14 — Maeryn Obley

An working example of the Global Drought Monitor, focusing on Eurasia and Africa.

Image: An working example of the Global Drought Monitor, focusing on Eurasia and Africa.

drought.mssl.ucl.ac.uk - Benjamin Lloyd-Hughes and Mark Saunders

The Global Drought Monitor  is a free internet application which monitors the severity of drought worldwide on an ongoing basis. The product will aid humanitarian relief by assisting warnings of potential food, water and health problems. The Global Drought Monitor  will also benefit the general public, government and industry by improving awareness of droughts and their impacts.

(VIEW WEBSITE)

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A Strong Message Sent from the Cabinet of the Maldives back in October 2009

Tue, 2013-01-15 00:45 — admin

An underwater Cabinet Meeting in the Maldives drives home the point of the effects carbon emissions are having on our environment a sea levels rise.

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CIA-commissioned report on climate change released

Thu, 2012-11-15 00:58 — Maeryn Obley

2010 Drought in Russia. (c) New York Times.

Image: 2010 Drought in Russia. (c) New York Times.

foreignpolicyblogs.com - November 10th, 2012 - Mia Bennett

The National Academy of Sciences (NAS) and National Research Council (NRC) have released a report commissioned by the CIA and various other American intelligence agencies on the security threats posed by climate change. The report’s goal is to inform intelligence agencies as to how to best carry out monitoring to anticipate climate-related disasters, help prevent them from occurring, and, when they do, respond to emergencies. The report investigates how climate change could potentially induce social and political stresses that will affect U.S. security over the next decade.

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Stop Talking About the Weather and Do Something: Three Ways to Finance Sustainable Cities

Sat, 2012-11-10 23:12 — Maeryn Obley

Submitted by Albert Gomez

hbswk.hbs.edu - November 6th, 2012

The wrath of Hurricane Sandy has illuminated a fundamental question: How do we ensure that our cities are resilient in the face of inevitable future disasters? A destroyed city is not a sustainable city. I'm making the case that it's time to stop complaining about climate change.

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The Great Transition, Part II: Building a Wind-Centered Economy

Sun, 2012-11-04 12:39 — Maeryn Obley

earth-policy.org - October 31st, 2012 - Lester R. Brown

In the race to transition from fossil fuels to renewable sources of energy and avoid runaway climate change, wind has opened a wide lead on both solar and geothermal energy. Solar panels, with a capacity totaling 70,000 megawatts, and geothermal power plants, with a capacity of some 11,000 megawatts, are generating electricity around the world. The total capacity for the world’s wind farms, now generating power in about 80 countries, is near 240,000 megawatts. China and the United States are in the lead.

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The battle against Big Energy's rush to ruin our planet

Fri, 2012-11-02 19:30 — Maeryn Obley

One plume of oil from BP's 2010 Deepwater Horizon well blowout produced a slick 22 miles long and a mile wide. Photograph: Ted Jackson/Times Picayune/AP

Image: One plume of oil from BP's 2010 Deepwater Horizon well blowout produced a slick 22 miles long and a mile wide. Photograph: Ted Jackson/Times Picayune/AP

guardian.co.uk - October 31st, 2012 - Daryl Hannah

Extreme killer superstorms, historic drought, vanishing sea ice, an increase in ocean acidity by 30%, the hottest decade on record and mega forest fires have increasingly become our new reality.

"That's all happened when you raise the temperature of the earth one degree," says author Bill McKibben, "[t]he temperature will go up four degrees, maybe five, unless we get off coal and gas and oil very quickly." Additional temperature rises could compromise our safety and cause incalculable damage from a large number of billion-dollar disasters in coming years – if we don't address our emissions, insist upon an appropriate climate policy and curtail the rogue fossil fuel industry.

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Sandy forces climate change on US election despite fossil fuel lobby

Thu, 2012-11-01 21:38 — Maeryn Obley

Currie Wagner looks over the debris from his grandmother Betty Wagner's house, destroyed by Sandy, in New Jersey. Photograph: Julio Cortez/AP

Image: Currie Wagner looks over the debris from his grandmother Betty Wagner's house, destroyed by Sandy, in New Jersey. Photograph: Julio Cortez/AP

guardian.co.uk - October 31st, 2012 - Bill McKibben

Here's a sentence I wish I hadn't written – it rolled out of my Macbook in May, part of an article for Rolling Stone that quickly went viral:

    "Say something so big finally happens (a giant hurricane swamps Manhattan, a megadrought wipes out Midwest agriculture) that even the political power of the industry is inadequate to restrain legislators, who manage to regulate carbon."

I wish I hadn't written it because the first half gives me entirely undeserved credit for prescience: I had no idea both would, in fact, happen in the next six months.

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