二酸化硫化物と炭酸塩溶解は,地質学的時間尺度におけるCO2の源として存在しています
Mark A Torres1, A Joshua West1, Gaojun Li2
1Department of Earth Sciences, University of Southern California, Los Angeles, California 90089, USA.
Nature
|March 21, 2014
まとめ
地球の長期の炭素循環の安定性は,これまで認識されていない二酸化炭素 (CO2) 源によって説明されうる:炭酸溶解と結合した硫化物の酸化が強化された. このプロセスは,潜在的に地質上昇によって引き起こされ,地質学的時間尺度におけるシリケート気象によるCO2消費のバランスをとるのに役立ちます.
科学分野:
- 地質化学 地質化学
- 地球科学 地球科学 地球科学
- 古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは
背景:
- 地球の気候の安定性は,地球の内部から排出される二酸化炭素 (CO2) と,シリケート気象によるCO2消費のバランスを取ることに依存しています.
- 紀元期の同位体記録は,山の上昇による気象による二酸化炭素の吸収の増加を示唆しているが,火山による二酸化炭素の吸収は増加せず,炭素循環のパラドックスが生じた.
- この不均衡は,炭素循環の長期的な質量バランスと地化学記録の理解を困難にしています.
研究 の 目的:
- 地質学的な時間スケールに関係する大気中の二酸化炭素 (CO2) の潜在的な一時的な源を調査する.
- カーボンサイクルの長期の質量バランスとケノゾイク時代の同位体記録を調和させるため.
- 大気中のCO2の調節における炭酸溶解と結合した硫化物酸化の役割を調査する.
主な方法:
- セノゾイク時代の同位体記録 (ストロンチウム,オスミウム,リチウム) の分析.
- 海底の広がりと火山の脱ガス率の再構築.
- 硫化物酸化と炭酸塩溶解を含む地化学プロセスのモデリング.
主要な成果:
- 炭酸塩溶解と結合した強化された硫化物酸化は,大気に一時的なCO2源を提供します.
- このCO2源は,シリケート気象化に似た構造的上昇によって強化されている可能性が高い.
- この過程は,ケノゾーイク期の大気中のCO2部分圧の相対的な安定性について,妥当な説明を提供している.
結論:
- 炭酸塩溶解と結合した硫化物の酸化は,長期的な炭素循環の重要な,しかししばしば見過ごされる構成要素です.
- このメカニズムは,気象を均衡させるCO2源を提供することによって",ケノゾイクイソトープ気象パラドックス"を解決するのに役立ちます.
- このプロセスのさらなる検討は,地球の炭素サイクル進化の正確な再構築のために必要である.
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