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学科主题: Meteorology & Atmospheric Sciences
题名: Summer persistence barrier of sea surface temperature anomalies in the central western north pacific
作者: Zhao, X ; Li, JP ; Zhang, WJ
通讯作者: ljp@lasg.iap.ac.cn
关键词: SST anomalies ; persistence barrier ; oceanic mixed layer ; atmospheric forcing ; positive cloud feedback on SSTAs
刊名: ADVANCES IN ATMOSPHERIC SCIENCES
发表日期: 2012
卷: 29, 期:6, 页:1159-1173
部门归属: [Zhao Xia; Li Jianping; Zhang Wenjun] Chinese Acad Sci, Inst Atmospher Phys, Natl Key Lab Numer Modeling Atmospher Sci & Geoph, Beijing 100029, Peoples R China; [Zhao Xia] Chinese Acad Sci, Inst Oceanol, Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China; [Zhao Xia] Chinese Acad Sci, S China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 51030, Guangdong, Peoples R China; [Zhang Wenjun] Nanjing Univ Informat Sci & Technol, Minist Educ, Key Lab Meteorol Disaster, Nanjing 210044, Peoples R China; [Zhang Wenjun] Nanjing Univ Informat Sci & Technol, Coll Atmospher Sci, Nanjing 210044, Peoples R China
项目归属: LTO
摘要: The persistence barrier of sea surface temperature anomalies (SSTAs) in the North Pacific was investigated and compared with the ENSO spring persistence barrier. The results show that SSTAs in the central western North Pacific (CWNP) have a persistence barrier in summer: the persistence of SSTAs in the CWNP shows a significant decline in summer regardless of the starting month. Mechanisms of the summer persistence barrier in the CWNP are different from those of the spring persistence barrier of SSTAs in the central and eastern equatorial Pacific. The phase locking of SSTAs to the annual cycle does not explain the CWNP summer persistence barrier. Remote ENSO forcing has little linear influence on the CWNP summer persistence barrier, compared with local upper-ocean process and atmospheric forcing in the North Pacific. Starting in wintertime, SSTAs extend down to the deep winter mixed layer then become sequestered beneath the shallow summer mixed layer, which is decoupled from the surface layer. Thus, wintertime SSTAs do not persist through the following summer. Starting in summertime, persistence of summer SSTAs until autumn can be explained by the atmospheric forcing through a positive SSTAs-cloud/radiation feedback mechanism because the shallow summertime mixed layer is decoupled from the temperature anomalies at depth, then the following autumn-winter-spring, SSTAs persist. Thus, summer SSTAs in the CWNP have a long persistence, showing a significant decline in the following summer. In this way, SSTAs in the CWNP show a persistence barrier in summer regardless of the starting month.
语种: 英语
WOS记录号: WOS:000310074000003
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10083
Appears in Collections:热带海洋环境国家重点实验室(LTO)_期刊论文

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Zhao, X; Li, JP; Zhang, WJ.Summer persistence barrier of sea surface temperature anomalies in the central western north pacific,ADVANCES IN ATMOSPHERIC SCIENCES,2012,29(6):1159-1173
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