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	Performance of the new ncar cam3.5 in east asian summer monsoon simulations: sensitivity to modifications of the convection scheme
	Chen, Haoming1,2; Zhou, Tianjun1; Neale, Richard B.3; Wu, Xiaoqing4; Zhang, Guang Jun5
刊名	Journal of climate
	2010-07-01
卷号	23期号:13页码:3657-3675
ISSN号	0894-8755
DOI	10.1175/2010jcli3022.1
通讯作者	Zhou, tianjun(zhoutj@lasg.iap.ac.cn)
英文摘要	The performance of an interim version of the ncar community atmospheric model (cam3.5) in simulating the east asian summer monsoon (easm) is assessed by comparing model results against observations and reanalyses. both the climate mean states and seasonal cycle of major easm components are evaluated. special attention is paid to the sensitivity of model performance to changes in the convection scheme. this is done by analyzing four cam3.5 runs with identical dynamical core and physical packages but different modifications to their convection scheme, that is, the original zhang-mcfarlane (zm) scheme, neale et al.'s modification (nzm), wu et al.'s modification (wzm), and zhang's modification (zzm). the results show that cam3.5 can capture the major climate mean states and seasonal features of the easm circulation system, including reasonable simulations of the tibetan high in the upper troposphere and the western pacific subtropical high (wpsh) in the middle and lower troposphere. the main deficiencies are found in monsoon rainfall and the meridional monsoon cell. the weak meridional land-sea thermal contrasts in the model contribute to the weaker monsoon circulation and to insufficient rainfall in both tropical and subtropical regions of easm. the seasonal migration of rainfall, as well as the northward jump of the wpsh from late spring to summer, is reasonably simulated, except that the northward jump of the monsoon rain belt still needs improvement. three runs using modified schemes generally improve the model performance in easm simulation compared to the control run. the monsoon rainfall distribution and its seasonal variation are sensitive to modifications of the zm convection scheme, which is most likely due to differences in closure assumptions. nzm, which uses a convective available potential energy (cape)-based closure assumption,performs better in tropical regions where the rainfall is closely related to cape. however, wzm and zzm, which use quasi-equilibrium (qe) closure, have more realistic subtropical rainfall in the mei-yu/baiu/changma front region, mainly because the rainfall in the subtropics is more sensitive to the rate of destabilization by the large-scale flow.
WOS关键词	GENERAL-CIRCULATION MODELS ; COMMUNITY ATMOSPHERE MODEL ; CLIMATE SYSTEM MODEL ; INTERANNUAL VARIABILITY ; CUMULUS CONVECTION ; MOMENTUM TRANSPORT ; TIBETAN PLATEAU ; AUSTRALIAN MONSOON ; WESTERN PACIFIC ; NORTH PACIFIC
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:000280101500015
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2407166
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 Sch, Beijing 100029, Peoples R China 3.Natl Ctr Atmospher Res, Boulder, CO 80307 USA 4.Iowa State Univ, Dept Geol & Atmospher Sci, Ames, IA USA 5.Univ Calif San Diego, Scripps Inst Oceanog, Div Climate Atmospher Sci & Phys Oceanog, La Jolla, CA 92093 USA
推荐引用方式 GB/T 7714	Chen, Haoming,Zhou, Tianjun,Neale, Richard B.,et al. Performance of the new ncar cam3.5 in east asian summer monsoon simulations: sensitivity to modifications of the convection scheme[J]. Journal of climate,2010,23(13):3657-3675.
APA	Chen, Haoming,Zhou, Tianjun,Neale, Richard B.,Wu, Xiaoqing,&Zhang, Guang Jun.(2010).Performance of the new ncar cam3.5 in east asian summer monsoon simulations: sensitivity to modifications of the convection scheme.Journal of climate,23(13),3657-3675.
MLA	Chen, Haoming,et al."Performance of the new ncar cam3.5 in east asian summer monsoon simulations: sensitivity to modifications of the convection scheme".Journal of climate 23.13(2010):3657-3675.

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