亚洲气溶的增加导致大西洋南部翻转循环的放缓
Fukai Liu1, Xun Li2, Yiyong Luo3
1Frontiers Science Center for Deep Ocean Multispheres and Earth System, Physical Oceanography Laboratory, and Sanya Oceanographic Institution, Ocean University of China, Qingdao, China. fliu@ouc.edu.cn.
Nature communications
|January 3, 2024
概括
增加的亚洲气溶 (AAs) 降温大气,导致大西洋南部翻转循环 (AMOC) 的放缓. 减少这些气溶可以帮助稳定AMOC并改善空气质量.
科学领域:
- 气候科学 气候科学
- 大气化学 大气化学
- 海洋学 海洋学 海洋学
背景情况:
- 大西洋南部翻转循环 (AMOC) 自上世纪90年代中期以来,有观察证据表明其放缓.
- 温室气体和北美/欧洲人为气溶 (AAs) 的减少与这种放缓有关.
- 越来越多的亚洲AA对AMOC的影响仍然不清楚.
研究的目的:
- 调查亚洲人为气溶 (AAs) 增加对大西洋南部翻转循环 (AMOC) 的影响.
主要方法:
- 利用气候模拟组合来分析亚洲气候变化的影响.
- 研究了环球静止罗斯比波的产生及其对大气循环模式的影响.
- 评估了对北大西洋西风和拉布拉多海水质变化的影响.
主要成果:
- 增加的亚洲AAs会导致辐射冷却,导致AMOC强度降低.
- 亚洲AA产生罗斯比波,将西部喷流转向南方,削弱北大西洋西风.
- 这种减弱阻碍了冷空气运输,影响了拉布拉多海水的转化,并导致AMOC减速.
结论:
- 亚洲人为气溶 (AAs) 的增加是导致观察到的大西洋南部翻转循环 (AMOC) 放缓的一个因素.
- 减少亚洲AA排放提供了减轻当地空气污染和提高AMOC稳定性的双重好处.
- 在多种不同配置的多种气候模型中,这些发现是稳定的.
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