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Freshwater Runoff From Greenland Ice Sheet Will More Than Double By End Of Century

Date:
June 12, 2008
Source:
University of Alaska Fairbanks
Summary:
The Greenland Ice Sheet is melting faster than previously calculated according to a recently released scientific paper. The study is based on the results of state-of-the-art modeling using data from the Intergovernmental Panel on Climate Change as well as satellite images and observations from on the ground in Greenland.

Southern tip of Greenland on November 2, 2001. New data shows that the Greenland Ice Sheet is melting faster than previously calculated.
Credit: Jacques Descloitres, MODIS Land Rapid Response Team, NASA/GSFC

The Greenland Ice Sheet is melting faster than previously calculated according to a scientific paper by University of Alaska Fairbanks researcher Sebastian H. Mernild published recently in the journal Hydrological Processes.

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The study is based on the results of state-of-the-art modeling using data from the Intergovernmental Panel on Climate Change as well as satellite images and observations from on the ground in Greenland.

Mernild and his team found that the total amount of Greenland Ice Sheet freshwater input into the North Atlantic Ocean expected from 2071 to 2100 will be more than double what is currently observed. The current East Greenland Ice Sheet freshwater flux is 257 km3 per year from both runoff and iceberg calving. This freshwater flux is estimated to reach 456 km3 by 2100.

Mernild’s results further show a change in total East Greenland freshwater flux from today’s values of 438 km3 per year to 650 km3 per year by 2100. This indicates an increase in global sea level rise estimates from 1.1 millimeters per year to 1.6 millimeters per year.

“The Greenland Ice Sheet mass balance is changing as a response to the altered climatic state,” said Mernild. “This is faster than expected. This affects freshwater runoff input to the North Atlantic Ocean, and plays an important role in determining the global sea level rise and global ocean thermohaline circulation.”

Mernild is conducting the research as part of the University of Alaska’s International Polar Year efforts. He was appointed a University of Alaska IPY postdoctoral fellow by UA president Mark Hamilton in 2007.


Story Source:

The above story is based on materials provided by University of Alaska Fairbanks. Note: Materials may be edited for content and length.


Journal Reference:

  1. Mernild et al. Climatic control on river discharge simulations, Zackenberg River drainage basin, northeast Greenland. Hydrological Processes, 2008; 22 (12): 1932 DOI: 10.1002/hyp.6777

Cite This Page:

University of Alaska Fairbanks. "Freshwater Runoff From Greenland Ice Sheet Will More Than Double By End Of Century." ScienceDaily. ScienceDaily, 12 June 2008. <www.sciencedaily.com/releases/2008/06/080612090919.htm>.
University of Alaska Fairbanks. (2008, June 12). Freshwater Runoff From Greenland Ice Sheet Will More Than Double By End Of Century. ScienceDaily. Retrieved November 24, 2014 from www.sciencedaily.com/releases/2008/06/080612090919.htm
University of Alaska Fairbanks. "Freshwater Runoff From Greenland Ice Sheet Will More Than Double By End Of Century." ScienceDaily. www.sciencedaily.com/releases/2008/06/080612090919.htm (accessed November 24, 2014).

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