Greenland Faces Crisis

http://www.thestatecolumn.com/scienc...facing-crisis/


A new study released Friday finds that Greenland has risen in recent years as the rate of ice melting has increased, a startling revelation that scientists attribute to global warming.

Speaking at a conference on Friday, a team of scientists from Ohio State University said a network of 50 GPS stations measured the uplift as the ice loss, noting that the rate of ice loss has accelerated in southern Greenland by 100 billion tons. The study was lead by Ohio State University researcher Michael Bevis.

Mr. Bevis noted that an unusually hot melting season in 2010 accelerated ice loss in southern Greenland by 100 billion tons, which led to large portions of the island’s bedrock rising an additional quarter of an inch. The discovery was noted by the team in a paper released ahead of the conclusion of a key global climate change conference in Durban, South Africa.

“Pulses of extra melting and uplift imply that we’ll experience pulses of extra sea level rise,” said Mr. Bevis. “The process is not really a steady process.”

Mr. Belvis said the only explanation for the strange uplift is the rate of ice melt caused, in part, by global warming. The melting and the resulting rise in sea level is one of the hallmarks of global warming, which has force researchers to resort to using some novel methods to overcome different seasonal and regional signals that obstruct their ability to measure the effect of rising temperatures.

“Really, there is no other explanation. The uplift anomaly correlates with maps of the 2010 melting day anomaly,” Mr. Bevis said. “In locations where there were many extra days of melting in 2010, the uplift anomaly is highest.”

The team of scientists noted that a melting day “anomaly” refers to the number of extra melting days – that is, days that were warm enough to melt ice – relative to the average number of melting days per year over several decades. The occurrence of “melting day anomalies” have increased in recent years as global emissions continue to increase.

Speaking on Friday, Mr. Bevis noted that in 2010, the southern half of Greenland lost an extra 100 billion tons of ice under conditions that scientists would consider anomalously warm.



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