Interpretation of the GRACE-derived mass trend in Enderby Land, Antarctica

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概要

• 論文の詳細を見る

• Monthly gravity solutions of the Gravity Recovery and Climate Experiment (GRACE) reveal three areas in Antarctica with striking interannual mass trends. The positive mass trend in Enderby Land, East Antarctica, is poorly understood because of uncertainties in the surface ice-sheet mass balance, post-glacial rebound (PGR), and processing of GRACE data. In this study, we compare the GRACE mass trends with values estimated from in situ snow-stake measurements, and Ice Cloud and land Elevation Satellite (ICESat) data. The mass trends estimated from ICESat data show a strong correlation with GRACE mass trends. In contrast, the snow-stake data show discrepancies with temporal variations in GRACE mass, especially in 2006. The discrepancies are probably associated with basal ice-sheet outflow, which is difficult to observe using snow stakes. We conclude that the bulk of the GRACE mass trend can be explained by snow accumulation and basal ice-sheet outflow.

• 国立極地研究所の論文

著者

• Doi Koichiro

  National Institute of Polar Research, Sokendai, Midori-cho 10-3, Tachikawa-city, Tokyo 190-8518, Jap

• Motoyama Hideaki

  National Institute Of Polar Research

• Motoyama Hideaki

  National Institute Of Polar Research Tokyo Japan

• Yamamoto Keiko

  Department Of Geophysics Graduate School Of Science Kyoto University Kyoto Japan

• Fukuda Yoichi

  Department of Geophysics, Graduate School of Science, Kyoto University

• Doi Koichiro

  National Institute Of Polar Research

• Doi Koichiro

  National Institute Of Polar Research Tokyo Japan

• Fukuda Yoichi

  Department Of Geophysics Graduate School Of Science Kyoto University Kyoto Japan

• Fukuda Yoichi

  Department Of Geophysics Graduate School Of Science Kyoto University

• Yamamoto Keiko

  Department Of Basic Allied Medicine School Of Health Sciences Gunma University

• Motoyama Hideaki

  National Inst. Of Polar Res. 10-3 Midori-cho Tachikawa-shi Tokyo 190-8518 Jpn

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