北半球 の 熱帯 循環 の 人為 的 弱まり
1Department of Earth and Planetary Sciences, Weizmann Institute of Science, Rehovot, Israel. rei.chemke@weizmann.ac.il.
Nature
|April 17, 2023
まとめ
ハドリー循環は熱帯の熱伝送に不可欠ですが 人間の排出により弱くなっています この発見は海面圧力のデータによって確認され,気候変動の予測と熱帯・亜熱帯の気象パターンに影響を与えます.
科学分野:
- 大気科学
- 気候の動態
- 熱帯気象学
背景:
- ハドリー循環は熱帯の熱と水分輸送に不可欠であり,低緯度の降水と温度に影響を与えます.
- 人為的な排出に対する ハドリー循環の反応を 正確に評価することは 人為的な気候変動を理解するために 極めて重要です
- 現在の研究は,気候モデルと大気再分析の間で矛盾する結果で,最近のハドリー循環の変化に重大な不確実性を示しています.
研究 の 目的:
- ハドリー循環の最近の変化を抑制するために
- ハドリー循環に対する人為的な排出の影響を決定する.
- 人為的な熱帯気候変化の予測に対する信頼を高めること
主な方法:
- ハドリー循環の最近の変化を制限するために,海平面圧力測定を使用しました.
- 最新の気候モデルと比較した結果です
- 観察された循環の変化は,人為的な排出に起因する.
主要な成果:
- ハドリー循環はここ数十年でかなり弱くなっている.
- この弱まりは 最新の気候モデルシミュレーションと一致しています
- 観測された弱化は人為的な排出量によるものです.
結論:
- ハドリー循環が弱体化している
- この発見は 熱帯の気候変動予測に対する 信頼を高めています
- ハドリー循環の人間による弱化は,地域の熱帯・亜熱帯気候パターンに重大な影響を及ぼします.
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