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過去15万年の間,氷の量と極地の気温の急速な結合
K M Grant1, E J Rohling, M Bar-Matthews
1School of Ocean and Earth Science, University of Southampton, National Oceanography Centre, European Way, Southampton SO14 3ZH, UK.
Nature
|November 16, 2012
まとめ
地球温暖化には,氷の量を理解することが必要です. 新しい海面データによると,氷の量の変化は極地の気候変化を密接に追跡し,融解の際に海面が急速に上昇する.
科学分野:
- 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,古代気候学 (paleoclimatology) とは
- 氷河学 氷河学とは
- 海水面に関する研究.
背景:
- 世界の氷の量動態を理解することは,現在の地球温暖化の中で海面上昇を予測するために不可欠です.
- 正確で継続的な海面記録は,過去の氷の量の変動を定量化するために不可欠です.
- 以前の研究は,年代測定の不確実性や海面記録のデータギャップによって制限されていた.
研究 の 目的:
- 過去15万年間をカバーする独立に日付付けされた,連続した,高解像度の海面記録を提示するためです.
- 過去の氷の量変化と極地気候の変動の間のタイミングと振幅の関係を調査する.
- 氷の量変動中の反応時間と変化速度を決定する.
主な方法:
- 連続した,高解像度の海面記録の独立した年代測定.
- 15万年にわたる海面データに関するミレニアムスケール分析.
- 海面変動の比較と南極とグリーンランドの気候記録.
主要な成果:
- 氷の量の変動は,南極とグリーンランドの気候の変動と強く一致しています.
- 氷の量の変化の幅は,南極の気候変化とより密接に相関しています.
- 北極の気候と氷の量の変化は,百年分の反応時間内に変化します.
- 氷の量の大幅な減少の間,海面上昇は1世紀あたり少なくとも1.2メートルに達した.
結論:
- 過去の氷の量の変化は,極地の気候の動態と密接に関連しています.
- 南極の気候は,氷の量変動の幅により大きな影響を及ぼしているようです.
- 急速な海面上昇は,氷の量を大幅に減少させる出来事の一貫した特徴です.
関連する概念動画
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Suppose 1000 g of water is heated from 40 degrees...
Suppose 1000 g of water is heated from 40 degrees...
Heating and Cooling Curves
When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...

