Reverse relationship between drought of mid-latitudes in East Asia and Northwest Pacific tropical cyclone genesis frequency in summer

被引：2

作者：

Choi J.-W. ^{[1
]}

Cha Y. ^{[1
]}

Kim J.-Y. ^{[1
]}

机构：

[1] National Institute of Meteorological Sciences, 33, Seohobuk-ro, Seogwipo, 63568, Jeju

来源：

Geoscience Letters | / 3卷 / 1期

关键词：

Effective drought index; Secondary circulation; Tropical cyclone frequency;

D O I：

10.1186/s40562-016-0061-4

中图分类号：

学科分类号：

摘要：

This study found that there is a significant negative correlation between summer drought in Korea, China and Japan and the frequency of tropical cyclone (TC) in the subtropical western North Pacific (SWNP) using effective drought index (EDI). The frequency of TCs that affect Korea is low (high) in a year of summer drought (non-drought). As a case study, in 1994 when there is extremely severe summer drought in Korea, there was high frequency of TCs while in 2003 when there was least severe summer drought, the frequency of TCs is the lowest. Changes in the anomalous secondary circulation, namely anomalous upward (downward) flow in the SWNP and anomalous downward (upward) flow in the mid-latitudes of East Asia, are one of the causes of drought (non-drought). © 2016, The Author(s).

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