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アジア高山域の氷河質量収支 : 衛星重力観測の再考
| Title: | アジア高山域の氷河質量収支 : 衛星重力観測の再考 |
| Other Titles: | Glacier mass balance in Asian high mountains : Reconsideration of satellite gravimetry estimates |
| Authors: | 松尾, 功二 Browse this author | | 日置, 幸介 Browse this author →KAKEN DB |
| Keywords: | 氷河 | | アジア高山域 | | 質量収支 | | 宇宙測地観測 | | 重力衛星GRACE | | Glaciers | | High Mountain Asia | | Mass balance | | Space geodetic observation | | GRACE gravity satellite |
| Issue Date: | Jan-2014 |
| Publisher: | 日本雪氷学会 |
| Journal Title: | 雪氷 |
| Volume: | 76 |
| Issue: | 1 |
| Start Page: | 45 |
| End Page: | 57 |
| Abstract: | 重力衛星GRACE やレーザー高度衛星ICESat のような宇宙測地衛星が台頭したことで，アジア高山域が有する広大な山岳氷河群の質量収支を，遠隔から連続的に計測できるようになった．これまでMatsuo and Heki（2010）とJacob et al.（2012）によって，GRACE重力データから，アジア高山域の氷河質量収支が推定された．しかしながら，その結果は，前者が年平均−47 Gt の顕著な減少，後者が年平均−11 Gt の僅かな減少，と互いに大きく異なっていた．本稿では，これら2つの研究について詳しく解説し，GRACE でアジア高山域を観測する際に配慮すべき幾つかの重要点を記述する．それらを把握した上で，新たなGRACE データ（Release05）と解析手法を用いて，アジア高山域の氷河質量収支を再推定する．最後に，ICESat を用いた近年の研究報告について解説する． | | The advent of space geodetic satellites as represented by the gravimetry satellite GRACE and the laser altimetry satellite ICESat has enabled remote and continuous monitoring of the glacier mass balance in extensive areas of Asia high mountains. As of now, the glacier mass balance there has been estimated by Matsuo and Heki (2010) and Jacob et al. (2012) using GRACE gravity data. However, these two estimates are significantly different each other, i.e. the former suggests substantial ice loss of〜47Gt yr−1, and the latter does slight ice loss of〜11 Gt yr−1. In this article, we review these two studies and describe several important points to consider when studying Asian high mountains with GRACE. Then we re-estimate the glacier mass balance there using the latest GRACE data set (Release05) and the new inversion technique. We also review the latest reports based on the ICESat laser altimetry. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/57022 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 日置 幸介
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