Light-absorbing snow impurity concentrations measured on Northwest Greenland ice sheet in 2011 and 2012
-
- AOKI Teruo
- Meteorological Research Institute Meteorological Research Institute
-
- MATOBA Sumito
- Institute of Low Temperature Science, Hokkaido University Institute of Low Temperature Science, Hokkaido University
-
- YAMAGUCHI Satoru
- 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
-
- TANIKAWA Tomonori
- Earth Observation Research Center, Japan Aerospace Exploration Agency Earth Observation Research Center, Japan Aerospace Exploration Agency
-
- NIWANO Masashi
- Meteorological Research Institute Meteorological Research Institute
-
- KUCHIKI Katsuyuki
- Meteorological Research Institute Meteorological Research Institute
-
- ADACHI Kouji
- Meteorological Research Institute Meteorological Research Institute
-
- UETAKE Jun
- Transdisciplinary Research Integration Center Transdisciplinary Research Integration Center National Institute of Polar Research National Institute of Polar Research
-
- MOTOYAMA Hideaki
- National Institute of Polar Research National Institute of Polar Research
-
- HORI Masahiro
- Earth Observation Research Center, Japan Aerospace Exploration Agency Earth Observation Research Center, Japan Aerospace Exploration Agency
Bibliographic Information
- Other Title
-
- 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)
Description
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.
Journal
-
- Bulletin of Glaciological Research
-
Bulletin of Glaciological Research 32 (0), 21-31, 2014
THE JAPANESE SOCIETY OF SNOW AND ICE
- Tweet
Keywords
Details 詳細情報について
-
- CRID
- 1390001204664957440
-
- NII Article ID
- 120005472231
- 130004679717
-
- ISSN
- 18848044
- 13453807
-
- HANDLE
- 2115/56971
-
- Text Lang
- en
-
- Data Source
-
- JaLC
- IRDB
- Crossref
- CiNii Articles
- KAKEN
- OpenAIRE
-
- Abstract License Flag
- Disallowed