Simulation of the East Asian Subtropical Westerly Jet Stream with GFDL AGCM (AM2.1)  

作　　者：HUANG Gang LIU Yong 

机构地区：[1]Key Laboratory of Regional Climate-Environment Research for Temperate East Asia （RCE-TEA）, Institute of Atmospheric Physics （lAP）, Chinese Academy of Science （CAS）, Beijing 100029, China [2]State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics （LASG）, IAP,, CAS, Beij＇ing 100029, China [3]Center for Monsoon System Research （CMSR）, IAP, CAS, Beijing 100080, China [4]Graduate University of Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Atmospheric and Oceanic Science Letters》2011年第1期24-29,共6页大气和海洋科学快报（英文版）

基　　金：supported by the National Basic Research Program of China (973 Program) under Grant 2011CB309704;the National Special Scientific Research Project for Public Interest under Grant 201006021;the National Natural Science Foundation of China under Grants 40890155,U0733002,and 40810059005

摘　　要：The present study validated the capability of the AM2.1,a model developed at NOAA's Geophysical Fluid Dynamics Laboratory (GFDL),in reproducing the fundamental features of the East Asian Subtropical Westerly Jet Stream (EASWJ).The main behaviors of the EASWJ are also investigated through the reanalysis of observational NCEP/NCAR data.The mean state of the EASWJ,including its intensity,location,structure,and seasonal evolution is generally well-portrayed in the model.Compared with the observation,the model tends to reproduce a weaker jet center.And,during summer,the simulated jet center is northward-situated.Results also demonstrate the model captures the variability of EASWJ during summer well.The results of the empirical orthogonal function (EOF) applied on the zonal wind at 200 hPa (U200) over East Asia for both the observation and simulation indicate an inter-decadal shift around the late 1970s.The correlation coefficient between the corresponding principle components is as great as 0.42 with significance at the 99% confidence level.The present study validated the capability of the AM2.1, a model developed at NOAA＇s Geophysical Fluid Dynamics Laboratory （GFDL）, in reproducing the fundamental features of the East Asian Subtropical Westerly Jet Stream （EASWJ）. The main behaviors of the EASWJ are also investigated through the reanalysis of observational NCEP/NCAR data. The mean state of the EASWJ, including its intensity, location, structure, and seasonal evolution is generally well-portrayed in the model. Compared with the observation, the model tends to reproduce a weaker jet center. And, during summer, the simulated jet center is northward-situated. Results also demonstrate the model captures the variability of EASWJ during summer well. The results of the empirical or- thogonal function （EOF） applied on the zonal wind at 200 hPa （U200） over East Asia for both the observation and simulation indicate an inter-decadal shift around the late 1970s. The correlation coefficient between the corresponding principle components is as great as 0.42 with significance at the 99% confidence level.

关 键 词：East Asian Subtropical Westerly Jet Stream seasonal evolution GCM 

分 类 号：P426.6[天文地球—大气科学及气象学] P467