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Archive for Antarctic

Forests as Rainmakers: New Study Lends Credence to Controversial Theory

New research suggests a controversial theory for forests as rainmakersIt seems intuitive that large forests exist in areas where there is a lot of rainfall. But what if the converse were true. What if forests themselves were a significant factor in causing rainfall?

That was the hypothesis first put forward by scientists Anastassia Makarieva and Victor Gorshkov in a 2006 paper published in Hydrology and Earth System Sciences. A follow-up study performed by the pair and three other scientists lends credence to the controversial theory they have developed.

If true, the atmospheric model the scientists have developed “could revolutionize the way we understand local climates, and their vulnerability, with many major implications,” according to the Center for International Forestry Research (CIFOR), which participated in the new study.

“It suggests, for instance, that by strategically replanting forests we could attract rainfall into desert and arid regions like the African Sahel, where drought has for years ravaged crops and induced famine. Likewise, significant forest loss could transform lush tropical regions into arid landscapes.” Read More→

Above Average Temperatures for November Keep U.S. on Track for Record Hot Year

November temperatures above average globally for the 333rd month in a rowOn Monday, scientists from the National Oceanic and Atmospheric Administration (NOAA) said that for the 333rd consecutive month November 2012 brought higher than average global temperatures. In fact, the last time November temperatures dropped below the 20th century average was in 1976. Last month global average temperature over land and oceans was 56.41°F, or the 5th highest recorded average land/sea temperatures during any November since 1880, 1.21°F warmer than the global 20th century average. The last time any month dipped below the long-term average was February 1995, 28 years ago.

The above average November temperatures in the contiguous United States brings the nation close to setting the record for the hottest year since record-keeping began in 1880. Average temperatures in the lower 48 states was 44.1°F, 2.1° above the 20th century average. While above-average, November 2012 ranks as just the 20th warmest November on record in the lower 48 but still enough to keep the year on track as the hottest on record in the US. The period from January through November 2012 is the warmest on record for the United States. Read More→

Video Friday: Temperature Leads CO2? The 800-Year Lag

Potholer54 (a.k.a Peter Hadfield) tackles a common myth about climate change often called the “800-year lag.”  Antarctic ice core data shows CO2 lagging temperature during periods of deglaciation; this has been well understood for decades. Despite this, many climate change “skeptics” ignore the full picture of numerous studies over the years and assert these data of ancient deglaciation “proves” that CO2 does not cause global warming

Enviro News Wrap: The Bright Side of Solar; Wind Power Matures; How the Koch Brothers Influence Environmental Policy, and more…

The Latest Environmental News HeadlinesGlobalWarmingisReal contributor Anders Hellum-Alexander wraps-up the climate and environmental news headlines for the past week:

50 Million Year Old Fossil Clams Shed Light on El Nino and Global Warming

One current climate theory suggests that global warming could result in El Nino conditions becoming permanent as opposed to occurring in prevailing two-to seven-year cycles. New research based on a study of a long-lived species of fossilized clam that lived of the coast of Antarctica indicates that was not the case during the early Eocene, when the Earth was as warm as it’s been in the last 65 million years.

El Nino is characterized by unusually warm ocean temperatures in the eastern equatorial Pacific, which can result in torrential rains in Peru and drought in Australia. It’s “the warm phase of a large oscillation in which the surface temperature of the tropical Pacific varies, causing changes in winds and rainfall patterns,” explains the Physorg,com report. The complete phenomenon is known as the El Nino Southern Oscillation, or ENSO.

Prevailing climate theory suggests that global warming could cause the ENSO to collapse and would result in permanent El Nino conditions. Read More→