2017 Fiscal Year Final Research Report
Understanding the process of dark ice expansion on glaciers in the Arctic region
Project/Area Number |
15K16120
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Multi-year Fund |
Research Field |
Environmental dynamic analysis
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Research Institution | National Institute of Polar Research |
Principal Investigator |
Nagatsuka Naoko 国立極地研究所, 研究教育系, 研究員 (30733208)
|
Research Collaborator |
Mateiu Ramona
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Project Period (FY) |
2015-04-01 – 2018-03-31
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Keywords | 氷床・氷河の暗色化 / 氷床・氷河上の不純物 / 氷床.氷河融解 / 黒色炭素 / 北極 / グリーンランド / Sr-Nd同位体比 |
Outline of Final Research Achievements |
In order to better understand the dark ice expansion on glaciers in the Arctic, we analyzed dark-colored surface dust (minerals and glacial microbes) and black carbon. Based on our analysis, a major contributor to the dark ice surface of glaciers in northwestern Greenland is likely to be minerals derived from surrounding moraines and englacial dust that was deposited in the past in the accumulation area, traveled through the ice sheet, and outcropped again in the ablation zone, which can accelerate glacial melting by reducing the surface albedo. Furthermore, the Scanning Electron Microscope analysis revealed that there are spatial variations in the morphology of black carbon in the Arctic snow, which can effect on theri light absorption, showed large variation among the region.
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Free Research Field |
雪氷学
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