Intensification of the Atlantic Multidecadal Variability Since 1870: Implications and Possible Causes

Intensification of the Atlantic Multidecadal Variability Since 1870: Implications and Possible Causes
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1870 年以来大西洋数十年变率的加剧:影响和可能的原因

DOI:
10.1029/2019jd030977
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发表时间:
2020-06
影响因子:
4.4
通讯作者:
Wang Huijun
Wang Huijun
中科院分区:
地球科学2区
文献类型:
--
作者:
Dong Si;Jiang Dabang;Wang Huijun

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大西洋的年代际变率(AMV)是年代际变率的重要来源,在北方许多地区的气候变化中起着重要作用,并产生了巨大的社会和经济影响。本文研究表明,自19世纪后期以来,AMV经历了一个显著的增长趋势。从1870年到2014年,AMV以每十年0.0040 ° C的速度增强,这在95%的置信水平下具有统计学意义。AMV将北大西洋放大的信号通过环全球遥相关型经欧亚大陆遥相关到北美,进一步加剧了北非、欧洲、东亚和北美的区域气候变率和极端气候。社区地球系统模式第1版的单一强迫和除一个外的所有强迫实验的结果表明,与其他外部强迫相比,人为气溶胶排放在AMV增强中发挥了更重要的作用,特别是在20世纪初至90年代期间。
The Atlantic multidecadal variability (AMV) acts as a key source of multidecadal variability and plays an important role in climate change in many regions of the Northern Hemisphere, resulting in great social and economic impacts. This paper shows that, since the late 19th century, the AMV has experienced a significant increasing trend. The AMV intensified at a rate of 0.0040°C per decade from 1870 to 2014, which is statistically significant at the 95% confidence level. The AMV teleconnects the amplified signal from the North Atlantic across the Eurasian continent to North America through a circumglobal teleconnection pattern, which further intensifies the regional climate variability and climate extremes in North Africa, Europe, East Asia, and North America. Results from the single‐forcing and all‐but‐one‐forcing experiments of the Community Earth System Model, version 1, indicate that anthropogenic aerosol emissions have played a more important role in the AMV intensification compared to other external forcings, especially during the period from the 1900s to 1990s.
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