ガス水素省の下にある,臨界圧のフリーガスの貯蔵庫
Matthew J Hornbach1, Demian M Saffer, W Steven Holbrook
1Department of Geology and Geophysics, University of Wyoming, Laramie, Wyoming 82071, USA. mhornbac@uwyo.edu
Nature
|January 9, 2004
まとめ
メタン水素は気候変動に影響するが,放出メカニズムは不明である. この研究は,水素酸塩の下にある重要なフリーガスゾーンを明らかにし,温暖化への感受性とメタンの急速な放出の可能性を示唆しています.
科学分野:
- 地球科学 地球科学 地球科学
- 気候科学 気候科学
- 地質物理学 地質物理学とは地質物理学です.
背景:
- 古代海洋学的データは,メタン水素が地球温暖化に影響を及ぼすことを示唆しています.
- 温暖化期間中のメタンの放出メカニズムは十分に理解されていません.
- 水素省の下にあるフリーガスゾーンは制限なしです.
研究 の 目的:
- フリーガスゾーンの厚さの機械的調節を故障滑りで評価する.
- 環境変化に対する水分県の感受性を理解する.
- フリーガス貯蔵庫からのメタンの放出の可能性を定量化するために.
主な方法:
- 断層滑りとガス柱の厚さの機械分析.
- フリーガスゾーンのダイナミクスのモデリング.
- グローバルフリーガス貯蔵庫の大きさの推定.
主要な成果:
- ほとんどの盆地水分県の下には,重要なガス柱の厚さが存在する.
- これらの地域は機械的に不安定で,環境の変化に敏感です.
- グローバルなフリーガス貯蔵庫は,総水素結合メタンの有意な部分を保持している可能性があります.
結論:
- 断層滑行は,相互接続されたフリーガスゾーンの最大厚さを機械的に調節することができます.
- ガス水素省は,気候変動に対する高い感受性を示す,失敗に瀕している.
- 海底温度が5°C上昇すると,2000ギガトンのメタンが放出され,迅速な放出メカニズムが提供される.
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