文献类型：期刊文献

英文题名：A Contrast of the Monsoon-Tropical Cyclone Relationship between the Western and Eastern North Pacific

作者：Weng, Jinwen[1];Wang, Lei[1,2];Luo, Jianzhou[1];Chen, Baiyang[1];Peng, Xugang[1];Gan, Qiuying[1]

机构：[1]Guangdong Ocean Univ, Coll Ocean & Meteorol, Lab Coastal Ocean Variat & Disaster Predict, Zhanjiang 524088, Peoples R China;[2]Guangdong Ocean Univ, Dept Educ Guangdong Prov, Key Lab Climate Resources & Environm Continental, Zhanjiang 524088, Peoples R China

年份：2022

卷号：13

期号：9

外文期刊名：ATMOSPHERE

收录：SCI-EXPANDED(收录号：WOS:000858047000001)、、EI(收录号：20223912807989)、Scopus(收录号：2-s2.0-85138720292)、WOS

基金：This work was supported by the National Natural Science Foundation of China [grant number 41776031], the National Key Research and Development Program of China [grant number 2018YFC1506903], the team project funding of scientific research innovation for universities in Guangdong province [grant number 2019KCXTF021], the program for scientific research start-up funds of Guangdong Ocean University [grant number R17051] and the Guangdong Natural Science Foundation [grant number 2015A030313796].

语种：英文

外文关键词：tropical cyclone; genesis frequency; western North Pacific monsoon; North American monsoon; eastern North Pacific; western North Pacific; genesis potential index (GPI)

外文摘要：The monsoon and tropical cyclone (TC) are principal components of global climate variability. The relationship between the monsoon intensity and the TC genesis frequency (TCGF) in different major monsoon regions has not been fully studied. Here, we compared the relationship of monsoon intensity and TCGF during the extended boreal summer between the western and eastern North Pacific, results of which revealed different monsoon-TC relationships (with opposite-sign correlations) in these two regions. A significant positive correlation could be found between the western North Pacific summer monsoon (WNPSM) index and the TCGF over the western North Pacific (WNP). In contrast, a significant negative correlation was identified between the North American summer monsoon (NASM) index and the TCGF over the eastern North Pacific (ENP). The observed different monsoon-TC relationships could be explained by the monsoon-associated changes in the environmental factors over the regions where TCs were formed and the influences from sea surface temperature (SST) anomalies across tropical ocean basins. By comparing the environmental factors in the TC genesis potential index (GPI), the mid-level relative humidity (vertical wind shear) was the factor to make the largest contribution to the monsoon-associated TC genesis changes over the WNP (ENP). In strong (weak) WNPSM years, the high (low) atmospheric mid-level relative humidity could promote (inhibit) the TCGF over the WNP, resulting in a significant positive monsoon-TC correlation. In contrast, in strong (weak) NASM years, the strong (weak) vertical wind shear could inhibit (promote) the TCGF over the ENP, thus leading to a significant negative monsoon-TC correlation. In addition, the WNPSM and the TCGF over the WNP could be modulated by the similar tropical Pacific-Atlantic SST anomalies jointly, thus leading to a significant positive correlation between the WNPSM and the WNP TCGF. In contrast, the signs of tropical Pacific-Atlantic SST anomalies influencing the NASM were almost opposite to those affecting the TCGF over the ENP, thus resulting in a significant negative correlation between the NASM and the ENP TCGF. The results obtained herein highlight the differences of the monsoon-TC relationship between the WNP and the ENP, which may provide useful information for the prediction of monsoon intensity and TC formation number over these two regions.