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New study links dust to increased glacier melting, ocean productivity (feedback)
http://www.eurekalert.org/pub_releases/2012-03/uomr-nsl030112.php[font face=Times, Times New Roman, Serif]Public release date: 1-Mar-2012
Contact: Andrew Dechellis
adechellis@rsmas.miami.edu
305-421-4473
University of Miami Rosenstiel School of Marine & Atmospheric Science
[font size=5]New study links dust to increased glacier melting, ocean productivity[/font]
[font size=4]Researchers analyze dust concentrations and their effects off southern Iceland [/font]
[font size=3]MIAMI -- A University of Miami (UM) Rosenstiel School of Marine and Atmospheric Science-led study shows a link between large dust storms on Iceland and glacial melting. The dust is both accelerating glacial melting and contributing important nutrients to the surrounding North Atlantic Ocean. The results provide new insights on the role of dust in climate change and high-latitude ocean ecosystems.
UM Rosenstiel School Professor Joseph M. Prospero and colleagues Joanna E. Bullard and Richard Hodgkins (Loughborough University, U.K.) analyzed six years of dust concentrations collected at the Stórhöfi research station on the island of Heimaey, which is located 17 km (10.5 mi) off the south coast of Iceland. The results show large increases in dust concentration, which can be traced to dust sources adjacent to major glaciers on Iceland.
As the glaciers melt, rivers of black, volcanic-rich sediments flow into the surrounding land and nearby ocean. Intense windstorms, common in the high-latitudes, eventually sweep up the dried sediments. The resulting dust storms are clearly visible in satellite images that show huge dust plumes extending hundreds of kilometers south over the Atlantic Ocean. Iceland glaciers are melting at a high rate due to global warming and to sub-glacial volcanic activity.
"The dust in Iceland dust storms can also have an impact on the glaciers themselves," said Prospero, UM Rosenstiel professor emeritus and lead author on the study. "The black dust deposited on the glacier surface absorbs solar radiation thereby increasing the rates of glacial melting."
...[/font][/font]
Contact: Andrew Dechellis
adechellis@rsmas.miami.edu
305-421-4473
University of Miami Rosenstiel School of Marine & Atmospheric Science
[font size=5]New study links dust to increased glacier melting, ocean productivity[/font]
[font size=4]Researchers analyze dust concentrations and their effects off southern Iceland [/font]
[font size=3]MIAMI -- A University of Miami (UM) Rosenstiel School of Marine and Atmospheric Science-led study shows a link between large dust storms on Iceland and glacial melting. The dust is both accelerating glacial melting and contributing important nutrients to the surrounding North Atlantic Ocean. The results provide new insights on the role of dust in climate change and high-latitude ocean ecosystems.
UM Rosenstiel School Professor Joseph M. Prospero and colleagues Joanna E. Bullard and Richard Hodgkins (Loughborough University, U.K.) analyzed six years of dust concentrations collected at the Stórhöfi research station on the island of Heimaey, which is located 17 km (10.5 mi) off the south coast of Iceland. The results show large increases in dust concentration, which can be traced to dust sources adjacent to major glaciers on Iceland.
As the glaciers melt, rivers of black, volcanic-rich sediments flow into the surrounding land and nearby ocean. Intense windstorms, common in the high-latitudes, eventually sweep up the dried sediments. The resulting dust storms are clearly visible in satellite images that show huge dust plumes extending hundreds of kilometers south over the Atlantic Ocean. Iceland glaciers are melting at a high rate due to global warming and to sub-glacial volcanic activity.
"The dust in Iceland dust storms can also have an impact on the glaciers themselves," said Prospero, UM Rosenstiel professor emeritus and lead author on the study. "The black dust deposited on the glacier surface absorbs solar radiation thereby increasing the rates of glacial melting."
...[/font][/font]
