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COMPLEX NETWORK OF EXTREME PRECIPITATION IN EAST ASIA
  Revised:May 29, 2017
KeyWords:climate network  synchronization  East Asian Summer Monsoon  extreme precipitation, prediction accuracy
Fund:
Author NameAffiliationE-mail
GONG Zhi-qiang Laboratory for Climate Prediction of National Climate Center, China Meteorological Administration, Beijing 100081 China  
SU Hai-jing   
HE Su-hong  hsh2046@sina.com 
FENG Guo-lin   
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Abstract:
      In order to study the spatial structure and dynamical mechanism of extreme precipitation in East Asia, a corresponding climate network is constructed by employing the method of event synchronization. It is found that the area of East Asian summer extreme precipitation can be separated into two regions: one with high area-weighted connectivity receiving heavy precipitation mostly during the active phase of the East Asian Summer Monsoon (EASM), and another one with low area-weighted connectivity receiving heavy precipitation during both the active and the retreating phase of the EASM. Besides, a new way for the prediction of extreme precipitation is also developed by constructing a directed climate networks. The simulation accuracy in East Asia is 58% with a 0-day lead, and the prediction accuracy is 21% and average 12% with a 1-day and an n-day (2≤n≤10) lead, respectively. Compared to the normal EASM year, the prediction accuracy is low in weak years and high in strong years, which is relevant to the differences of correlations and extreme precipitation rates in different EASM situations. Recognizing and indentifying these effects is good for understanding and predicting extreme precipitation in East Asia.
DOI:10.16555/j.1006-8775.2017.04.008
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