Strengthening of the Kuroshio current by intensifying tropical cyclones

doi:10.1126/science.aax5758

GSTDTAP > 气候变化

DOI	10.1126/science.aax5758
	Strengthening of the Kuroshio current by intensifying tropical cyclones
	Yu Zhang; Zhengguang Zhang; Dake Chen; Bo Qiu; Wei Wang
	2020-05-29
发表期刊	Science
出版年	2020
英文摘要	The intensity and frequency of the strongest cyclones east of Taiwan have increased over the past several decades as the climate has warmed. Zhang et al. found that one result of this trend has been the strengthening of Kuroshio current transport off the coast of Japan. The Kuroshio, like its Atlantic counterpart the Gulf Stream, is a surface current that moves huge volumes of warm water from low latitudes to high ones. As strong Pacific cyclones have become stronger, they have increased the amount of energy contained in cyclonic mesoscale ocean eddies and decreased that of anticyclonic ones. This in turn has increased the transfer of energy to the Kuroshio as eddies move into the current, providing a feedback between climate warming and ocean heat transport. Science , this issue p. [988][1] A positive feedback mechanism between tropical cyclones (TCs) and climate warming can be seen by examining TC-induced energy and potential vorticity (PV) changes of oceanic geostrophic eddies. We found that substantial dissipation of eddies, with a strong bias toward dissipation of anticyclonic eddies, is directly linked to TC activity. East of Taiwan, where TCs show a remarkable intensifying trend in recent decades, the ocean exhibits a corresponding upward trend of positive PV anomalies. Carried westward by eddies, increasing numbers of positive PV anomalies impinge on the Kuroshio current, causing the mean current to accelerate downstream. This acts in opposition to decreasing basin-scale wind stress and has a potentially important warming impact on the extratropical ocean and climate. [1]: /lookup/doi/10.1126/science.aax5758
领域	气候变化 ; 资源环境
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/271757
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Yu Zhang,Zhengguang Zhang,Dake Chen,et al. Strengthening of the Kuroshio current by intensifying tropical cyclones[J]. Science,2020.
APA	Yu Zhang,Zhengguang Zhang,Dake Chen,Bo Qiu,&Wei Wang.(2020).Strengthening of the Kuroshio current by intensifying tropical cyclones.Science.
MLA	Yu Zhang,et al."Strengthening of the Kuroshio current by intensifying tropical cyclones".Science (2020).