In a new study reported in Nature, climate scientist Rob DeConto of the University of Massachusetts Amherst and colleagues elsewhere propose a simple new mechanism to explain the source of carbon that fed a series of extreme warming events about 55 million years ago, the Paleocene-Eocene Thermal Maximum (PETM), and a sequence of similar, smaller warming events afterward.
First there was ‘unprecedented melting’ in 2005, then came the new Greenland melting record of 2010 – again to be broken this year, during the hot July of 2012, NASA images show.
Ocean level rise is known as one of the most disquieting effects of global warming, with more than three billion people living on the coast or less than 200 kilometres land inward and one tenth of the world population living … Continue reading
There has been much speculation about what exactly caused the end of the last ice age 10,000 years ago. Some say the Earth’s orbital changes were the cause, others say it was an increase in atmospheric CO2. But although a … Continue reading
Each year at the end of winter the Arctic sea ice reaches its maximum extent. Although unsurprisingly this ice maximum receives less media attention than the annual sea ice minimum in September, combining the two gives a better representation of … Continue reading
Graph of the day: world temperature record between 1880 and 2011, showing annual and 5-year mean temperature, NASA’s Goddard Institute for Space Studies (GISS) data. Image credit: NASA Earth Observatory, Robert Simmon.
To notice something is going on with the world’s ice sheets, you could measure melting water runoff, glacier retreat or use satellites and GPS to measure ice volume decline. Just like measuring sea level rise and temperature this all adds … Continue reading