Light-absorbing snow impurity concentrations measured on Northwest Greenland ice sheet in 2011 and 2012

AOKI, Teruo; MATOBA, Sumito; YAMAGUCHI, Satoru; TANIKAWA, Tomonori; NIWANO, Masashi; KUCHIKI, Katsuyuki; ADACHI, Kouji; UETAKE, Jun; MOTOYAMA, Hideaki; HORI, Masahiro

Light-absorbing snow impurity concentrations measured on Northwest Greenland ice sheet in 2011 and 2012

AOKI, Teruo; MATOBA, Sumito; YAMAGUCHI, Satoru et al.

Bulletin of Glaciological Research, 2014, 32, 21-31

Permalink : https://hdl.handle.net/2115/56971

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アクセス権	open access
URI	https://hdl.handle.net/2115/56971
タイトル	Light-absorbing snow impurity concentrations measured on Northwest Greenland ice sheet in 2011 and 2012
タイトル	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
著者	AOKI, Teruo ; MATOBA, Sumito ; YAMAGUCHI, Satoru ; TANIKAWA, Tomonori ; NIWANO, Masashi ; KUCHIKI, Katsuyuki ; ADACHI, Kouji ; UETAKE, Jun ; MOTOYAMA, Hideaki ; HORI, Masahiro
e-Rad_Researcher 30354492 著者名 AOKI, Teruo 青木, 輝夫
e-Rad_Researcher 30391163 著者名 MATOBA, Sumito 的場, 澄人
e-Rad_Researcher 70425510 著者名 YAMAGUCHI, Satoru 山口, 悟
著者名 TANIKAWA, Tomonori 谷川, 朋範
e-Rad_Researcher 10515026 著者名 NIWANO, Masashi 庭野, 匡思
e-Rad_Researcher 80442739 著者名 KUCHIKI, Katsuyuki 朽木, 勝幸
著者名 ADACHI, Kouji 足立, 光司
e-Rad_Researcher 40455473 著者名 UETAKE, Jun 植竹, 淳
e-Rad_Researcher 20210099 著者名 MOTOYAMA, Hideaki 本山, 秀明
著者名 HORI, Masahiro 堀, 雅裕
言語	英語
キーワード	Greenland
	snow impurities
	black carbon
	dust
	sublimation
	グリーンランド
	積雪不純物
	ブラックカーボン
	ダスト
	昇華
発行日	2014-08
出版者	The Japanese Society of Snow and Ice
出版者	日本雪氷学会
収録物名	Bulletin of Glaciological Research
巻(号)	32
ページ	21-31
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.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
PISSN	1345-3807
EISSN	1884-8044
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.5331/bgr.32.21