2012 was among 10 warmest years in global record: NASA/NOAA

Quelle: Scientific American vom 15.01.2013

Last year was among the top 10 warmest in the modern global record, two U.S. climate-watching agencies reported on Tuesday, less than a week after 2012 was declared the hottest ever in the contiguous United States.

WASHINGTON (Reuters) - Last year was among the top 10 warmest in the modern global record, two U.S. climate-watching agencies reported on Tuesday, less than a week after 2012 was declared the hottest ever in the contiguous United States.

The U.S. space agency NASA and the National Oceanic and Atmospheric Administration jointly issued two reports on 2012 world temperatures. NASA ranked last year the ninth-warmest since record-keeping began in 1880, while NOAA found last year was the tenth-warmest.

The difference in the two rankings may be due to NASA's extrapolation of temperatures in areas with no weather stations, particularly near the poles, according to James Hansen, director of NASA's Goddard Institute for Space Studies in New York.

The 2012 global surface temperature, including land and water, was 1 degree F (.56 degree C) warmer than the 1951-1980 average. That was enough to increase extreme high temperatures last year, Hansen reported.

Last year was also the 36th consecutive year with a global temperature hotter than the 20th century average, scientists from the two agencies told a media briefing.

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UC Irvine scientist: Climate change policies not working fast enough

Quelle: SCPR 09.01.2013

A scientist at UC Irvine is calling for greater urgency in the effort to control greenhouse gases.

In a study published in Environmental Research Letters, earth systems scientist Steven J. Davis and three co-authors said carbon emissions are growing faster than ever, prompting them to re-think a strategy on reversing climate change.

“After eight years of mostly delay, the action now required is significantly greater,” the paper concludes.

The only way to significantly slow global warming is through innovation in the field of energy production, they said. They call for new approaches that will support the development of carbon-free energy on a massive scale.

“Doing so would entail a fundamental and disruptive overhaul of the global energy system, as the global energy infrastructure is replaced with new infrastructure that provides equivalent amounts of energy but does not emit carbon dioxide,” they write.

That's in direct opposition to a theory of "wedges" popularized nearly a decade ago, when climate scientists began framing their thinking around the idea that global carbon emissions could be kept in check by a series of small steps.

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US 2012 heat record 'partly due to climate change'

Quelle: BBC vom 09.01.2013

The US sweltered under its hottest year on record in 2012, breaking the previous yearly average by 0.6C (1F), the US government has said.

Last year the average US temperature was 13C (55.3F) amid widespread drought and a mild winter. Scientists said the heat was caused both by global warming and by natural weather variation. But they said the size of the increase over the previous record year, 1998, was unprecedented.

"These records do not occur like this in an unchanging climate," Kevin Trenberth, head of climate analysis at the National Center for Atmospheric Research, said. "And they are costing many billions of dollars."

In 2012, 11 weather-related disasters caused at least $1bn (£623m) in damage, including "superstorm" Sandy and a months-long drought that hit almost two-thirds of the country, according to the National Oceanic and Atmospheric Administration (NOAA).

The drought - the worst in the US since the 1950s - contributed to higher temperatures. Without enough moisture in the soil to evaporate into rainfall, air becomes hotter and dryer.

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Tuesday the 19th. www.sustainable-impact.de