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.

中文翻译：

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自1870年以来大西洋多年代际变化的加剧：含义和可能的原因

大西洋多年代际变率（AMV）是多年代际变率的关键来源，在北半球许多地区的气候变化中起着重要作用，从而产生了巨大的社会和经济影响。本文表明，自19世纪末以来，AMV经历了明显的增长趋势。从1870年到2014年，AMV以每十年0.0040°C的速度增强，在95％的置信水平上具有统计学意义。AMV通过外接全球遥传模式将放大的信号从北大西洋跨越欧亚大陆传至北美，这进一步加剧了北非，欧洲，东亚和北美的区域气候多变性和极端气候。