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	East china summer rainfall variability of 1958-2000: dynamical downscaling with a variable-resolution agcm
	Zou, Liwei1,2; Zhou, Tianjun1; Li, Laurent3,4; Zhang, Jie1,2
刊名	Journal of climate
	2010-12-01
卷号	23期号:23页码:6394-6408
ISSN号	0894-8755
DOI	10.1175/2010jcli3689.1
通讯作者	Zhou, tianjun()
英文摘要	A variable grid atmospheric general circulation model namely laboratoire de meteorologie dynamique zoom version 4 (lmdz4) with a local zoom over eastern china is driven by 40 yr european centre for medium range weather forecasts (ecmwf) re analysis (era 40) data and is used as a downscaling tool of summer rainfall variability for the period 1958-2000 during the integration, the model temperature and wind were nudged to the era-40 data through a relaxation procedure the performance of the lmdz4 in simulating the regional rainfall features is thoroughly assessed through a comparison to both rain gauge data and the reanalysis product the dynamical downscaling improves not only the climatology of the monsoon major rainband but also the interannual variability modes of rainfall over eastern china in comparison with that of the era 40 data the added values of lmdz4 are evident in both the spatial patterns of dominant rainfall van ability modes and the associated temporal variations a comparison of rainfall averaged over several typical regions shows improvement as a better matched variability and a reduced root mean square error except for the region over the lower reaches of the yellow river valley where the model shows bias because of the northward shift of the monsoon rainband this rainband shift is caused by the stronger low level southerlies and the lower specific humidity over southern china the stronger southwestern wind transports excessive water vapor northward and the underestimation of specific humidity implies that air masses need to go farther north to reach condensation both favor a northward shift of the major rainband the analysis demonstrates that a variable resolution agcm can be a useful tool for the dynamical downscaling of rainfall variability over eastern china although the rainband bias remains evident as with many other regional climate models
WOS关键词	REGIONAL CLIMATE MODEL ; GENERAL-CIRCULATION MODEL ; SURFACE AIR-TEMPERATURE ; INTERANNUAL VARIABILITY ; MONSOON PRECIPITATION ; CUMULUS CONVECTION ; US PRECIPITATION ; ATMOSPHERIC GCM ; SIMULATION ; SENSITIVITY
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
语种	英语
出版者	AMER METEOROLOGICAL SOC
WOS记录号	WOS:000285432800018
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2409616
专题	中国科学院大学
通讯作者	Zhou, Tianjun
作者单位	1.Chinese Acad Sci, Inst Atmospher Phys, LASG, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100029, Peoples R China 3.UPMC, Lab Meteorol Dynam, IPSL CNRS, Paris, France 4.China Meteorol Adm, Natl Climate Ctr, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Zou, Liwei,Zhou, Tianjun,Li, Laurent,et al. East china summer rainfall variability of 1958-2000: dynamical downscaling with a variable-resolution agcm[J]. Journal of climate,2010,23(23):6394-6408.
APA	Zou, Liwei,Zhou, Tianjun,Li, Laurent,&Zhang, Jie.(2010).East china summer rainfall variability of 1958-2000: dynamical downscaling with a variable-resolution agcm.Journal of climate,23(23),6394-6408.
MLA	Zou, Liwei,et al."East china summer rainfall variability of 1958-2000: dynamical downscaling with a variable-resolution agcm".Journal of climate 23.23(2010):6394-6408.

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