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Ice sheet mass loss caused by dust and black carbon accumulation


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タイトル: Ice sheet mass loss caused by dust and black carbon accumulation
著者: Goelles, T. 著作を一覧する
Bøggild, C. E. 著作を一覧する
Greve, R. 著作を一覧する
発行日: 2015年 4月23日
出版者: Copernicus Publications on behalf of the European Geosciences Union
誌名: The Cryosphere
巻: 9
号: 5
開始ページ: 1845
終了ページ: 1856
出版社 DOI: 10.5194/tc-9-1845-2015
抄録: Albedo is the dominant factor governing surface melt variability in the ablation area of ice sheets and glaciers. Aerosols such as mineral dust and black carbon (soot) accumulate on the ice surface and cause a darker surface and therefore a lower albedo. The darkening effect on the ice surface is currently not included in sea level projections, and the effect is unknown. We present a model framework which includes ice dynamics, aerosol transport, aerosol accumulation and the darkening effect on ice albedo and its consequences for surface melt. The model is applied to a simplified geometry resembling the conditions of the Greenland ice sheet, and it is forced by several temperature scenarios to quantify the darkening effect of aerosols on future mass loss. The effect of aerosols depends non-linearly on the temperature rise due to the feedback between aerosol accumulation and surface melt. According to our conceptual model, accounting for black carbon and dust in future projections of ice sheet changes until the year 3000 could induce an additional volume loss of 7 %. Since we have ignored some feedback processes, the impact might be even larger.
資料タイプ: article
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: Greve Ralf


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