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DOI10.1175/JCLI-D-16-0744.1
Strengthening and Westward Shift of the Tropical Pacific Walker Circulation during the Mid-Holocene: PMIP Simulation Results
Tian, Zhiping1,2; Li, Tim2,3,4; Jiang, Dabang1,3,4,5,6
2018-03-01
发表期刊JOURNAL OF CLIMATE
ISSN0894-8755
EISSN1520-0442
出版年2018
卷号31期号:6页码:2283-2298
文章类型Article
语种英语
国家Peoples R China; USA
英文摘要

Based on the zonal mass streamfunction, the mid-Holocene annual and seasonal changes in the tropical Pacific Walker circulation (PWC) are examined using numerical simulations from the Paleoclimate Modelling Intercomparison Project Phases 2 and 3. Compared to the preindustrial period, the annual mean of the PWC intensity strengthened (with an average increase of 0.26 X 10(14) kg(-2) m(-22) s(-1) or 5%), and both the western edge and center of the PWC cell shifted westward (by an average of 4 degrees and 3 degrees, respectively) in the majority of the 29 models used for analysis during the mid-Holocene. Those changes were closely related to an overall increase in the equatorial Indo-Pacific east-west sea level pressure difference and low-level trade winds over the equatorial Pacific. Annual mean PWC changes come mainly from boreal warm seasons. In response to the mid-Holocene orbital forcing, Asian and North African monsoon rainfall was strengthened due to large-scale surface warming in the Northern Hemisphere in boreal warm seasons, which led to an intensified large-scale thermally direct east-west circulation, resulting in the enhancement and westward shift of the tropical PWC. The opposite occurred during the mid-Holocene boreal cold seasons. Taken together, the change in the monsoon rainfall over the key tropical regions of Asia and North Africa and associated large-scale east-west circulation, rather than the equatorial Pacific SST change pattern, played a key role in affecting the mid-Holocene PWC strength.


领域气候变化
收录类别SCI-E
WOS记录号WOS:000427447000012
WOS关键词MODELING INTERCOMPARISON PROJECT ; GLACIAL-INTERGLACIAL CYCLE ; EL-NINO ; EQUATORIAL PACIFIC ; AFRICAN MONSOON ; CLIMATE-CHANGE ; INTERANNUAL VARIABILITY ; SOUTHERN-OSCILLATION ; SURFACE-TEMPERATURE ; CMIP5 MODELS
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/20674
专题气候变化
作者单位1.Chinese Acad Sci, Inst Atmospher Phys, Beijing, Peoples R China;
2.Univ Hawaii Manoa, Sch Ocean & Earth Sci & Technol, Int Pacific Res Ctr, Honolulu, HI 96822 USA;
3.Nanjing Univ Informat Sci & Technol, Int Lab Climate & Environm Change, Nanjing, Jiangsu, Peoples R China;
4.Nanjing Univ Informat Sci & Technol, Key Lab Meteorol Disaster, Nanjing, Jiangsu, Peoples R China;
5.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China;
6.Chengdu Univ Informat Technol, Joint Lab Climate & Environm Change, Chengdu, Sichuan, Peoples R China
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GB/T 7714
Tian, Zhiping,Li, Tim,Jiang, Dabang. Strengthening and Westward Shift of the Tropical Pacific Walker Circulation during the Mid-Holocene: PMIP Simulation Results[J]. JOURNAL OF CLIMATE,2018,31(6):2283-2298.
APA Tian, Zhiping,Li, Tim,&Jiang, Dabang.(2018).Strengthening and Westward Shift of the Tropical Pacific Walker Circulation during the Mid-Holocene: PMIP Simulation Results.JOURNAL OF CLIMATE,31(6),2283-2298.
MLA Tian, Zhiping,et al."Strengthening and Westward Shift of the Tropical Pacific Walker Circulation during the Mid-Holocene: PMIP Simulation Results".JOURNAL OF CLIMATE 31.6(2018):2283-2298.
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