Light-absorbing snow impurity concentrations measured on Northwest Greenland ice sheet in 2011 and 2012（2011年及び2012年に北西グリーンランド氷床上で観測された光吸収性積雪不純物濃度）
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- AOKI Teruo（青木輝夫）
- Meteorological Research Institute Meteorological Research Institute
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- MATOBA Sumito（的場澄人）
- Institute of Low Temperature Science, Hokkaido University Institute of Low Temperature Science, Hokkaido University
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- YAMAGUCHI Satoru（山口悟）
- Snow and Ice Research Center, National Research Institute for Earth Science and Disaster Prevention Snow and Ice Research Center, National Research Institute for Earth Science and Disaster Prevention
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- TANIKAWA Tomonori（谷川朋範）
- Earth Observation Research Center, Japan Aerospace Exploration Agency Earth Observation Research Center, Japan Aerospace Exploration Agency
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- NIWANO Masashi（庭野匡思）
- Meteorological Research Institute Meteorological Research Institute
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- KUCHIKI Katsuyuki（朽木勝幸）
- Meteorological Research Institute Meteorological Research Institute
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- ADACHI Kouji（足立光司）
- Meteorological Research Institute Meteorological Research Institute
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- UETAKE Jun（植竹淳）
- Transdisciplinary Research Integration Center Transdisciplinary Research Integration Center National Institute of Polar Research National Institute of Polar Research
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- MOTOYAMA Hideaki（本山秀明）
- National Institute of Polar Research National Institute of Polar Research
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- HORI Masahiro（堀雅裕）
- Earth Observation Research Center, Japan Aerospace Exploration Agency Earth Observation Research Center, Japan Aerospace Exploration Agency
書誌事項
- タイトル別名
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- Light-absorbing snow impurity concentrations measured on Northwest Greenland ice sheet in 2011 and 2012
抄録
Light-absorbing snow impurities of elemental carbon (EC), organic carbon (OC), and mineral dust have been measured at three locations at elevations from 1,469 to 1,992 m on August 1, 2011, and at the site SIGMA-A (78°N, 68°W, elevation 1,490 m) on the northwest Greenland ice sheet (GrIS) during the period from June 28 to July 12, 2012. At SIGMA-A, a remarkable snow surface lowering together with snow melting was observed during the observation period in 2012, when a record surface melting event occurred over the GrIS. The concentrations in the surface were 0.9, 3.8, and 107 ppbw for EC, OC, and dust, respectively, at the beginning of the period, which increased to 4.9, 17.2, and 1327 ppbw for EC, OC, and dust, respectively, at the end. The EC and dust concentrations were remarkably higher than those at the three locations in 2011 and the recent measurements at Summit. However, our measurements for EC and OC could be underestimated because a recent study indicates that the collection efficiency of a quartz fiber filter, which we employed, is low. We confirm that the snow surface impurity concentrations were enhanced in the observation period, which can be explained by the effects of sublimation/evaporation and snow melt amplification associated with drastic melting. Scanning electron microscopy analysis of surface snow impurities on July 12 revealed that the major component of snow impurities is mineral dust with size larger than 5 μm, which suggests possible emission source areas are peripheral bare soil regions of Greenland and/or the Canadian Arctic.
収録刊行物
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- 氷河情報センター
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氷河情報センター 32 (0), 21-31, 2014
公益社団法人 日本雪氷学会
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詳細情報 詳細情報について
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- CRID
- 1390001204664957440
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- NII論文ID
- 120005472231
- 130004679717
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- ISSN
- 18848044
- 13453807
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- HANDLE
- 2115/56971
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- IRDB
- Crossref
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可