文献类型：期刊文献

英文题名：Observed Interannual Relationship between ITCZ Position and Tropical Cyclone Frequency

作者：Liao, Xiaoqing[1,2];Olloway, Christophere. H.[3];Feng, Xiangbo[3,4];Liu, Chunlei[1,3];Lyu, Xinyu[5];Xue, Yufeng[1,2];Bao, Ruijuan[4,6];Li, Jiandong[5,7];Qiao, Fangli[8,9]

机构：[1]Guangdong Ocean Univ, South China Sea Inst Marine Meteorol, Zhanjiang, Peoples R China;[2]Guangdong Ocean Univ, Coll Ocean & Meteorol, Zhanjiang, Peoples R China;[3]Univ Reading, Dept Meteorol, Reading, England;[4]Univ Reading, Natl Ctr Atmospher Sci, Reading, England;[5]Tianjin Jizhou Meteorol Bur, Tianjin, Peoples R China;[6]Fujian Key Lab Severe Weather, Fuzhou, Peoples R China;[7]Chinese Acad Sci, Inst Atmospher Phys, Beijing, Peoples R China;[8]Minist Nat Resources, Inst Oceanog 1, Qingdao, Peoples R China;[9]Minist Nat Resources, Key Lab Marine Sci & Numer Modeling, Qingdao, Peoples R China

年份：2023

卷号：36

期号：16

起止页码：5587

外文期刊名：JOURNAL OF CLIMATE

收录：SCI-EXPANDED(收录号：WOS:001038419500001)、、EI(收录号：20234314945554)、Scopus(收录号：2-s2.0-85174533994)、WOS

基金：This work is jointly supported by the National Natural Science Foundation of China (42275017, 42075036, 72293604, 42130605) , Fujian Key Laboratory of Severe Weather (2021KFKT02) , the scientific research start-up grant of Guangdong Ocean University (R20001) , and the Post-graduate Education Innovation Project of Guangdong Ocean University (202144) . Chunlei Liu is also supported by the University of Reading as a visiting fellow. Xiangbo Feng was supported by the Met Office Weather and Climate Science for Service Partnership for Southeast Asia, as part of the Newton Fund. We thank three anonymous reviewers for reviewing this paper and providing constructive comments and suggestions.

语种：英文

外文关键词：KEYWORDS; Climate; Intertropical convergence zone; ENSO; Precipitation; Tropical cyclones

外文摘要：There are no well-accepted mechanisms that can explain the annual frequency of tropical cyclones (TCs) both globally and in individual ocean basins. Recent studies using idealized models showed that the climatological frequency of TC genesis (TCG) is proportional to the Coriolis parameter associated with the intertropical convergence zone (ITCZ) position. In this study, we investigate the effect of the ITCZ position on TCG on the interannual time scale using observations over 1979-2020. Our results show that the TCG frequency is significantly correlated with the ITCZ position in the North Atlantic (NA) and western North Pacific (WNP), with more TCG events in years when the ITCZ is farther poleward. The ITCZ-TCG relationship in NA is dominated by TCG events in the tropics (0 & DEG;-20 & DEG;N), while the relationship in WNP is due to TCs formed in the east sector (140 & DEG;E-180 & DEG;). We further confirmed that ENSO has little effect on the ITCZ-TCG relationship despite the fact that it can affect the ITCZ position and TCG frequency separately. In NA and WNP, a poleward shift of ITCZ is significantly associated with large-scale environment changes favoring TCG in the main development region (MDR). However, the basinwide TCG frequency has a weak relationship with the ITCZ in other ocean basins. We showed that a poleward ITCZ in the eastern North Pacific and South Pacific favors TCG on the poleward flank of the MDR, while it suppresses TCG on the equatorward flank, leading to insignificant change in the basinwide TCG frequency. In the south Indian Ocean, the ITCZ position has weak effect on TCG frequency due to the mixed influences of environmental conditions.