氷床の質量バランスの調整された推定値

Andrew Shepherd¹, Erik R Ivins, Geruo A

¹School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK. ashepherd@leeds.ac.uk

Science (New York, N.Y.)

|December 1, 2012

まとめ

地球の極地氷床は質量を失い,海面上昇に貢献しています. 衛星データを組み合わせることで,これらの重要な気候変動測定の確実性が向上します.

科学分野:

地球科学地球科学地球科学
氷河学氷河学とは
気候科学気候科学

背景:

極地氷床の質量バランスの正確な推定は,世界の海面上昇を理解するために非常に重要です.
以前の研究は,しばしば単一の衛星方法に依存しており,不確実性をもたらしました.

研究の目的:

衛星データの組み合わせを用いて地球の極地氷床の質量バランスを推定する.
氷床の質量バランスの推定のための異なる衛星方法の間の合意を評価する.
極地の氷床が世界の海面上昇に与える影響を判断する.

主な方法:

衛星高度計,干渉計,重力計のデータセットを組み合わせたものです.
共通の地理的地域,時間間隔,そして表面質量バランスと氷河の同静的調整のためのモデルを利用した.
1992年から2011年の間にグリーンランド,東南極,西南極,南極半島に関するデータを分析した.

主要な成果:

異なる衛星方法,特にグリーンランドと西南極については,良好な一致が見られた.
衛星データセットを組み合わせることで,質量均衡の推定の確実性が向上しました.
1992年以来,北極の氷床は世界の海面上昇に年間平均0.59±0.20mmの貢献をしてきた.

結論:

結合された衛星アプローチにより,極地の氷床の質量バランスのより堅実な推定が得られる.
北極の氷床は,現代の世界の海面上昇に大きく,測定可能な貢献をしている.
統合された衛星技術を用いた継続的なモニタリングは,気候変動の影響を追跡するために不可欠です.

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