Advances in Earth Science ›› 2010, Vol. 25 ›› Issue (10): 1082-1090. doi: 10.11867/j.issn.1001-8166.2010.10.1082

• Articles • Previous Articles     Next Articles

Comparison of East Asian Summer Monsoon in Three Climate Typical Periods during Last Millennium Based on ECHOG Simulation

Kuang Xueyuan 1, Liu Jian 2, Lin Huijuan 3, Wang Hongli 2, Ti Ruyuan 2   

  1. 1.School of Atmospheric Sciences, Nanjing University, Nanjing210093, China; 
    2. State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China;
    3. Zhejiang Institute of Meteorological Sciences, Hangzhou 310017, China
  • Received:2010-02-23 Revised:2010-06-29 Online:2010-10-10 Published:2010-10-10

Kuang Xueyuan, Liu Jian, Lin Huijuan, Wang Hongli, Ti Ruyuan. Comparison of East Asian Summer Monsoon in Three Climate Typical Periods during Last Millennium Based on ECHOG Simulation[J]. Advances in Earth Science, 2010, 25(10): 1082-1090.

The East Asian Summer Monsoon (EASM) has long been focused owing to its crucial role in modulating the East Asian climate. Although many results have been obtained from modern monsoon research, it is still difficult to further study the mechanism of paleo-monsoon due to lack of meteorological data. In this paper, monsoon index is chosen to depict the intensity change of EASM in order to understand the monsoon differences of three climate typical periods based on the modeling results derived from ECHO-G coupled climate model for the last millennium. The results indicate that the index Isun which is defined with thermal contrast between land and sea is well associated with the precipitation of the Yangtze River Basin and North China on interannual time scale, while the index Iwang defined with zonal wind at 850 hPa is in accordance with the  precipitation of  the  Yangtze River Basin on decadal time scale. The general circulation differences of three climate typical periods reveal that EASM is the strongest in the Medieval Warm Period (MWP), then the Present Warm Period (PWP) and that of the Little Ice Age (LIA) is the weakest, which is corresponding to the precipitation magnitude in East Asian continent in each period. The correlations between the summer index and SST in three climate typical periods show that the impact of ENSO on EASM has been reinforced in PWP. Further analysis reveals that effective solar radiation is the main controlling factor on EASM in MWP but the greenhouse gases plays primary role in EASM in PWP. 

No related articles found!
Full text