QQ客服 官方微博 反馈留言

	Seasonally evolving dominant interannual variability modes of east asian climate
	Wu, Bo1,2; Zhou, Tianjun1; Li, Tim3,4
刊名	Journal of climate
	2009-06-01
卷号	22期号:11页码:2992-3005
ISSN号	0894-8755
DOI	10.1175/2008jcli2710.1
通讯作者	Zhou, tianjun(zhoutj@lasg.iap.ac.cn)
英文摘要	A season-reliant empirical orthogonal function (s-eof) analysis is applied to seasonal mean precipitation over east asia for the period of 1979-2004. the first two dominant modes account for 44% of the total interannual variance, corresponding to post-enso and enso turnabout years, respectively. the first mode indicates that in el nino decaying summer, an anomalous anticyclone appears over the western north pacific (wnp). this anticyclone is associated with strong positive precipitation anomalies from central china to southern japan. in the following fall, enhanced convection appears over the wnp as a result of the underlying warm sst anomalies caused by the increase of the shortwave radiative flux in the preceding summer. a dry condition appears over southeastern china. the anomalous precipitation pattern persists throughout the subsequent winter and spring. the second mode shows that during the el nino developing summer the anomalous heating over the equatorial central pacific forces a cyclonic vorticity over the wnp. this strengthens the wnp monsoon. meanwhile, an anomalous anticyclone develops in the northern indian ocean and moves eastward to the south china sea and the wnp in the subsequent fall and winter. this leads to the increase of precipitation over southeastern china. the anticyclone and precipitation anomalies are maintained in the following spring through local air-sea interactions. the diagnosis of upper-level velocity potential and midlevel vertical motion fields reveals a season-dependent indian ocean forcing scenario. the indian ocean basinwide warming during the el nino mature winter and the subsequent spring does not have a significant impact on anomalous circulation in the wnp, because convection over the tropical indian ocean is suppressed by the remote forcing from the equatorial central-eastern pacific. the basinwide warming plays an active role in impacting the wnp anomalous anticyclone during the enso decaying summer through atmospheric kelvin waves or hadley circulation.
WOS关键词	SEA-SURFACE TEMPERATURE ; 500 HPA HEIGHT ; INDIAN-OCEAN ; SUMMER MONSOON ; TROPICAL PACIFIC ; SOUTH CHINA ; EL-NINO ; PART II ; ENSO ; TELECONNECTION
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:000267763200012
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2394781
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.Univ Hawaii Manoa, IPRC, Honolulu, HI 96822 USA 4.Univ Hawaii Manoa, Dept Meteorol, Honolulu, HI 96822 USA
推荐引用方式 GB/T 7714	Wu, Bo,Zhou, Tianjun,Li, Tim. Seasonally evolving dominant interannual variability modes of east asian climate[J]. Journal of climate,2009,22(11):2992-3005.
APA	Wu, Bo,Zhou, Tianjun,&Li, Tim.(2009).Seasonally evolving dominant interannual variability modes of east asian climate.Journal of climate,22(11),2992-3005.
MLA	Wu, Bo,et al."Seasonally evolving dominant interannual variability modes of east asian climate".Journal of climate 22.11(2009):2992-3005.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。