深海变暖引起的厄尔尼诺现象变化
Geon-Il Kim1, Ji-Hoon Oh1, Na-Yeon Shin1
1School of Earth and Environmental Sciences, Seoul National University, Seoul, South Korea.
Nature communications
|July 23, 2024
概括
温室气体引起的深海变暖将导致类似厄尔尼诺的情况,并增加极端厄尔尼诺事件. 这种长期的海洋变暖影响气候模式,即使在二氧化碳排放量减少之后.
科学领域:
- 气候科学 气候科学
- 海洋学 海洋学 海洋学
- 大气科学 大气科学
背景情况:
- 深海充当一个重要的热,吸收温室气体排放产生的多余热量.
- 这种吸收的热量会影响全球气候调节,并会随着时间的推移释放出来,影响未来的海洋变暖模式.
研究的目的:
- 研究深海变暖对厄尔尼诺-南方振荡 (ENSO) 事件的影响.
- 确定延迟的深海热释放如何影响热带太平洋降水和ENSO特征.
主要方法:
- 对模拟深海变暖情景的气候模型输出的分析.
- 评估海洋表面温度变化,降水模式和ENSO动态.
主要成果:
- 深海变暖推动了热带东太平洋地区类似厄尔尼诺现象的海面变暖.
- 预计东太平洋地区降雨量将增加,热带融合区将向南转移.
- 预计厄尔尼诺-南方振荡事件将向东转移,加剧东太平洋厄尔尼诺的发生.
- 在深海变暖条件下,对流极端的厄尔尼诺现象可能会增加40-80%.
结论:
- 人为温室气体变暖对厄尔尼诺现象的变化有持久的影响,原因是深海变暖的延迟.
- 即使二氧化碳稳定,储存的深海热量的释放也将在长时间内继续影响气候模式.
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