Article

Advances in Atmospheric Sciences

, Volume 26, Issue 1, pp 109-118

First online:

Interdecadal change in extreme precipitation over South China and its mechanism

  • Liang Ning宁 亮Affiliated withDepartment of Atmospheric Sciences, Nanjing University
  • , Yongfu Qian钱永甫Affiliated withDepartment of Atmospheric Sciences, Nanjing University Email author 

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Abstract

Based on the daily precipitation data taken from 17 stations over South China during the period of 1961–2003, a sudden change in summer extreme precipitation events over South China in the early 1990s along with the possible mechanism connected with the anomalies of the latent heat flux over the South China Sea and the sensible heat flux over the Indochina peninsula are examined. The results show that both the annual and summer extreme precipitation events have obvious interdecadal variations and have increased significantly since the early 1990s. Moreover, the latent heat flux over the South China Sea and the sensible heat flux over the Indochina peninsula also have obvious interdecadal variations consistent with that of the extreme precipitation, and influence different months’ extreme precipitation, respectively. Their effects are achieved by the interdecadal increases of the strengthening convection over South China through the South China Sea Summer Monsoon.

Key words

extreme precipitation interdecadal change South China sensible heat flux latent heat flux