DOI: 10.1175/JCLI-D-16-0744.1
Scopus记录号: 2-s2.0-85043702274
论文题名: Strengthening and westward shift of the tropical Pacific walker circulation during the mid-Holocene: PMIP simulation results
作者: Tian Z. ; Li T. ; Jiang D.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 6 起始页码: 2283
结束页码: 2298
语种: 英语
英文关键词: Atmosphere-ocean interaction
; Climatology
; Coupled models
; Monsoons
; Tropics
; Walker circulation
Scopus关键词: Atmospheric thermodynamics
; Climate change
; Climatology
; Oceanography
; Rain
; Sea level
; Atmosphere-ocean interactions
; Coupled models
; Equatorial Pacific
; Monsoons
; Northern Hemispheres
; Paleoclimate modelling
; Sea level pressure
; Walker circulation
; Tropics
; Pomatiopsis californica
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 × 1014 kg2 m-2 s-1 or 5%), and both the western edge and center of the PWC cell shifted westward (by an average of 4° and 3°, 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. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111611
Appears in Collections: 气候减缓与适应
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作者单位: Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; International Pacific Research Center, School of Ocean and Earth Science and Technology, University of Hawai'i at Manoa, Honolulu, HI, United States; International Laboratory on Climate and Environment Change, Key Laboratory of Meteorological Disaster, Nanjing University of Information Science and Technology, Nanjing, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, China; Joint Laboratory for Climate and Environmental Change, Chengdu University of Information Technology, Chengdu, China
Recommended Citation:
Tian Z.,Li T.,Jiang D.. Strengthening and westward shift of the tropical Pacific walker circulation during the mid-Holocene: PMIP simulation results[J]. Journal of Climate,2018-01-01,31(6)