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氷床の質量バランスと気候変動
Edward Hanna1, Francisco J Navarro, Frank Pattyn
1Department of Geography, University of Sheffield, Sheffield S10 2TN, UK. ehanna@sheffield.ac.uk
Nature
|June 7, 2013
まとめ
新しいデータは,グリーンランドが氷の質量をより速く失っていることを示し,南極の氷の損失は,以前考えられていたよりも少ない可能性があることを示しています. 東南極,西南極,南極半島については,重要な不確実性が残っています.
科学分野:
- 氷河学 氷河学とは
- 気候変動科学 気候変動科学
- 地球システム科学 地球システム科学
背景:
- 2007年の気候変動に関する政府間パネル第4次評価報告書 (IPCC AR4) は,氷床の質量バランスのベースラインを提供した.
- その後の進歩には,新しい観測データと強化された気候モデルが含まれています.
- 氷床の動態を理解することは,海面上昇の予測に不可欠です.
研究 の 目的:
- IPCC AR4以降の氷床質量バランス研究の進展をレビューする.
- グリーンランドと南極の現在の氷の減少率を評価するために.
- 氷床の質量変化の残りの不確実性を特定するために.
主な方法:
- 氷床の質量バランスの新しい衛星観測の分析.
- 気候変動に対する氷床の反応の改善されたコンピューターシミュレーションの評価.
- 過去6年間の研究成果をまとめました.
主要な成果:
- グリーンランドは,氷の質量減少が加速していることを経験しています.
- 南極の氷の損失の推定値は,最近のいくつかの出版物で示唆されているよりも低いかもしれません.
- 東南極,西南極,南極半島における質量変化に関する重大な不確実性は残っている.
結論:
- グリーンランドの氷の減少がますます明らかになっている一方で,南極の氷の動態は複雑で不確実なままです.
- 南極の氷床の質量バランスの不一致を解決するためにさらなる研究が必要である.
- 継続的なモニタリングと改善されたモデリングは,正確な気候変動影響評価に不可欠です.
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