Projected change in the relationship between East Asian summer rainfall and upper-tropospheric westerly jet

被引:20
作者
Dai Yi [1 ,2 ]
Lu RiYu [1 ]
机构
[1] Chinese Acad Sci, Natl Key Lab Numer Modeling Atmospher Sci & Geoph, Inst Atmospher Phys, Beijing 100029, Peoples R China
[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
来源
CHINESE SCIENCE BULLETIN | 2013年 / 58卷 / 12期
关键词
East Asian rainfall; East Asian upper-tropospheric jet; interannual variability; relationship; projected change; INTERANNUAL MERIDIONAL DISPLACEMENT; MONSOON; SIMULATION; CLIMATE; CHINA; MODEL; ASSOCIATIONS; VARIABILITY; CIRCULATION;
D O I
10.1007/s11434-012-5540-1
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The authors analyzed the interannual variability in summer precipitation and the East Asian upper-tropospheric jet (EAJ) over East Asia under the Historical and Representative Concentration Pathways Scenarios (RCPs, including RCP4.5 and RCP8.5), using outputs of 17 Coupled Model Intercomparison Project phase 5 (CMIP5) coupled models. The analyzed results indicate that the models can reasonably reproduce relatively stronger interannual variability in both East Asian summer rainfall (EASR) and EAT. These models can also capture the relationship between the rainfall anomaly along the East Asian rain belt and meridional displacement of the EAJ. Projected results suggest that the interannual variabilities in precipitation along the East Asian rain belt and in the EAT are enhanced under the scenarios RCP4.5 and RCP8.5 in the 21st century, which is consistent with the previous studies. Furthermore, it is found that the relationship between the East Asian rainfall and the meridional displacement of the EAT is projected to be stronger in the 21st century under the global warming scenarios, although there are appreciable discrepancies among the models.
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页码:1436 / 1442
页数:7
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