An interdecadal change of tropical cyclone activity in the South China Sea in the early 1990s

Lei Yang; Yan Du; Shangping Xie; Dongxiao Wang

doi:10.1007/s00343-012-1258-9

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An interdecadal change of tropical cyclone activity in the South China Sea in the early 1990s

OriginalPaper | Updated：2023-05-16

- An interdecadal change of tropical cyclone activity in the South China Sea in the early 1990s
- An interdecadal change of tropical cyclone activity in the South China Sea in the early 1990s
- 海洋湖沼学报（英文） 2012年30卷第6期页码：953-959
- Affiliations：
  
  1. State Key Laboratory of Tropical Oceanography South China Sea Institute of Oceanology Chinese Academy of Sciences
  2. International Pacific Research Center and Department of Meteorology University of Hawaii at Manoa
  3. Key Laboratory of Physical Oceanography Ministry of Education Ocean University of China
- Author bio：
- Funds：
  
  Supported by the National Basic Research Program of China (973 Program) (No. 2011CB403500), the Knowledge Innovation Program of Chinese Academy of Sciences (Nos. KZCX2-YW-Q11-02, XDA05090404), the National Basic Research Program of China (973 Program) (No. 2010CB950302), the Qianren and Changjiang Scholar Projects, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), and SOEST-8711 & IPRC-901
- DOI：10.1007/s00343-012-1258-9
  中图分类号：
- 网络首发：2012-11-17，
  
  纸质出版：2012
- Accepted：
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An interdecadal change of tropical cyclone activity in the South China Sea in the early 1990s[J]. 海洋湖沼学报（英文）, 2012,30(6):953-959.

Yang, L., Du, Y., Xie, S. et al. An interdecadal change of tropical cyclone activity in the South China Sea in the early 1990s., Chin. J. Ocean. Limnol. 30, 953–959 (2012). https://doi.org/10.1007/s00343-012-1258-9
An interdecadal change of tropical cyclone activity in the South China Sea in the early 1990s[J]. 海洋湖沼学报（英文）, 2012,30(6):953-959. DOI： 10.1007/s00343-012-1258-9.

Yang, L., Du, Y., Xie, S. et al. An interdecadal change of tropical cyclone activity in the South China Sea in the early 1990s., Chin. J. Ocean. Limnol. 30, 953–959 (2012). https://doi.org/10.1007/s00343-012-1258-9 DOI：

摘要

Abstract

Tropical cyclone (TC) genesis in the South China Sea (SCS) during 1979–2008 underwent a decadal variation around 1993. A total of 55 TCs formed in the SCS from May to September during 1994–2008

about twice that during 1979–1993 (27). During the TC peak season (July–September

JAS)

there were 43 TCs from 1994–2008

but only 17 during 1979–1993. For July in particular

13 TCs formed from 1994–2008

but there were none during 1979–1993. The change in TC number is associated with changes of key environmental conditions in atmosphere and ocean. Compared to 1979–1993

the subtropical high was significantly weaker and was displaced more eastward during 1994–2008. In the former period

a stronger subtropical high induced downward flow

inhibiting TC formation. In the latter period

vertical wind shear and outgoing longwave radiation all weakened. Mid-level (850–500 hPa) humidity

and relative vorticity were higher. Sea surface temperature and upper layer heat content were also higher in the area. All these factors favor TC genesis during the latter period. The decadal change of TC genesis led to more landfalling TCs in Southern China during the period 1994–2008

which contributed to an abrupt increase in regional rainfall.

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Keywords

references

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