Consistent decrease in North Atlantic Tropical Cyclone frequency following major volcanic eruptions in the last three centuries
Consistent decrease in North Atlantic Tropical Cyclone frequency following major volcanic eruptions in the last three centuries
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DOI：
10.1002/2015gl066154
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发表时间：
2015-11-16
影响因子：
5.2
通讯作者：
Cashman, K. V.
中科院分区：
文献类型：
--
作者：
Guevara-Murua, A.;Hendy, E. J.;Cashman, K. V.
大规模火山爆发后，硫酸盐气溶胶注入平流层，通过吸收和散射太阳辐射改变全球气候。一种可能的后果是北大西洋热带气旋活动减少，正如在El Chichon（1982年）和Mount Pinatubo（1991年）爆发之后观察到的那样。我们测试这种关系，在过去的三个世纪中，在北大西洋盆地的主要火山爆发和TC频率的文件和代理重建。我们发现一个一致的减少TC的数量在3年内形成的主要喷发相比，前3年，包括位于北方高纬度地区的喷发后。我们的研究结果表明，低纬度爆发降低大西洋TC频率降低当地海面温度，而TC频率降低高纬度爆发后的机制不太清楚，归因是阻碍了这些事件的识别不良。
Injection of sulphate aerosols into the stratosphere following major volcanic eruptions alters global climate through the absorption and scattering of solar radiation. One proposed consequence is a decrease in North Atlantic Tropical Cyclone (TC) activity, as was observed following the El Chichon (1982) and Mount Pinatubo (1991) eruptions. We test this relationship using documentary and proxy reconstructions of major volcanic eruptions and TC frequency in the North Atlantic basin over the last three centuries. We find a consistent reduction in the number of TCs formed during the 3 years following major eruptions compared to the preceding 3 years, including after eruptions located at northern high latitudes. Our findings suggest that low-latitude eruptions reduce Atlantic TC frequency by decreasing local sea surface temperatures, whereas the mechanisms for the decrease in TC frequency following high-latitude eruptions are less clear and attribution is hampered by poor identification of these events.