Soot from Canadian wildfires may have increased Greenland ice melt
Soot from Canadian wildfires may have increased Greenland ice melt
03 October 2014
published by www.adn.com
Greenland — Researchers studying Greenlands massive ice-sheet are making some worrisome findings.
Danish-born glaciologist Jason Box who has studied glaciers for two-decades is in the second year of a study called the Dark Snow Project. He is with the Geological Survey of Greenland and Denmark.
They found that soot is covering immense areas of the ice-sheet, darkening and increasing its heat absorption, causing melting to increase. The soot may be from a variety of sources including burning of coal, diesel, dung and wood.
Its also thought that greatly increased soot this year is due to the record number of fires in Canadas Northwest Territories. Some 8.6 million acres of forest went up in smoke in the Northwest Territories alone this year, while many other huge wildfires occurred in all provinces in Canadas boreal forest area. Although its considered the end of the fire season, several wildfires are still burning.
Melting attributed to conditions created by human-induced climate change
Mike Flannigan, of the University of Alberta Director of the Western Partnership for Wildland Fire Science says, forest fires used to average about 2.5 million acres a year, but now average double that saying its due to human induced climate change.
A French research team also reports increased dust covering the glacier. They indicate it may come from elsewhere in the Arctic as snow cover melts earlier in the season because of climate change.
As the Greenland sheet is darkened, its albedo or the reflective quality of the white snow and ice is diminished. Scientists say even a slight reduction in the albedo will have a significant affect on the ice sheet.
A recent study using the European Cryosat2 and based on reprocessed and improved data between 2003 and 2008, reports an average trend of ice-loss of Greenlands ice sheet of over 190 cubic kilometers (45.5 cubic miles) per year. Analysis of ice loss from GRACE estimates are somewhat lower but still surprisingly worrisome at 145 cubic kilometers (35 cubic miles) a year.
Box says the increased melting will have an effect on sea-level rise around the world.
The findings of Box and his team have yet to be peer-reviewed but he released the images this week in hopes that those attending the international climate talks at the UN would get the message.
