Science daily: Earth Science News

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ScienceDaily: Earth Science News

New report on the state of polar regions

Posted: 03 Apr 2012 04:37 PM PDT

A new synthesis of reports from thousands of scientists in 60 countries who took part in the International Polar Year (IPY) 2007-08, is the first in over 50 years to offer a benchmark for environmental conditions and new discoveries in the polar regions.

Amount of coldest Antarctic water near ocean floor decreasing for decades

Posted: 03 Apr 2012 12:38 PM PDT

Scientists have found a large reduction in the amount of the coldest deep ocean water, called Antarctic Bottom Water, all around the Southern Ocean using data collected from 1980 to 2011.

U. S. Temperatures hit record highs in March

Posted: 03 Apr 2012 12:35 PM PDT

Compared to seasonal norms, March 2012 was the warmest month on record in the 48 contiguous U.S. states. Temperatures over the U.S. averaged 2.82 C (almost 5.1 degrees Fahrenheit) warmer than normal in March.

Coral links ice sheet collapse to ancient ‘mega flood’

Posted: 03 Apr 2012 10:55 AM PDT

Coral off Tahiti has linked the collapse of massive ice sheets 14,600 years ago to a dramatic and rapid rise in global sea-levels of around 14 meters.

Photoperiodism may slow the range shift of species northwards

Posted: 03 Apr 2012 08:16 AM PDT

Climate change is predicted to promote species’ range shifts and invasions from southern latitudes northwards. However, climate change does not affect the seasonal variation in day length. The length of the day in northern latitudes still depends on the position of the Earth in relation to the Sun. The photoperiodism of species — in other words, their ability to adapt to seasonal variation in day length and quality of light — plays an important role when species attempt to expand their distribution range northwards, experts report.

Pollen can protect mahogany from extinction

Posted: 03 Apr 2012 08:14 AM PDT

New research could help protect one of the world’s most globally threatened tree species – the big leaf mahogany – from extinction.

New light shone on photosynthesis

Posted: 03 Apr 2012 05:52 AM PDT

One of the outstanding questions of the early Earth is how ancient organisms made the transition from anoxygenic (no oxygen produced) to oxygenic photosynthesis. Scientists have now moved closer to solving this conundrum.
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