DOI: 10.1175/JCLI-D-11-00263.1
Scopus记录号: 2-s2.0-84858165565
论文题名: Regional patterns of tropical indo-pacific climate change: Evidence of the walker circulation weakening
作者: Tokinaga H. ; Xie S.-P. ; Timmermann A. ; McGregor S. ; Ogata T. ; Kubota H. ; Okumura Y.M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 5 起始页码: 1689
结束页码: 1710
语种: 英语
Scopus关键词: Air sea interactions
; Indian Ocean
; Pacific ocean
; Tropical variabilty
; Walker circulation
; Atmospheric temperature
; Climate change
; Computer simulation
; Sea level
; Wind effects
; Tropics
; air-sea interaction
; atmosphere-ocean coupling
; atmospheric moisture
; climate change
; cloud cover
; computer simulation
; mixed layer
; oceanic general circulation model
; precipitation (climatology)
; regional climate
; sea surface temperature
; Walker circulation
; Indian Ocean
; Indian Ocean (Tropical)
; Pacific Ocean
; Pacific Ocean (Tropical)
英文摘要: Regional patterns of tropical Indo-Pacific climate change are investigated over the last six decades based on a synthesis of in situ observations and ocean model simulations, with a focus on physical consistency among sea surface temperature (SST), cloud, sea level pressure (SLP), surface wind, and subsurface ocean temperature. A newly developed bias-corrected surface wind dataset displays westerly trends over the western tropical Pacific and easterly trends over the tropical Indian Ocean, indicative of a slowdown of the Walker circulation. This pattern of wind change is consistent with that of observed SLP change showing positive trends over the Maritime Continent and negative trends over the central equatorial Pacific. Suppressed moisture convergence over the Maritime Continent is largely due to surface wind changes, contributing to observed decreases in marine cloudiness and land precipitation there. Furthermore, observed ocean mixed layer temperatures indicate a reduction in zonal contrast in the tropical Indo-Pacific characterized by larger warming in the tropical eastern Pacific and western Indian Ocean than in the tropical western Pacific and eastern Indian Ocean. Similar changes are successfully simulated by an ocean general circulation model forced with the bias-corrected wind stress. Whereas results from major SST reconstructions show no significant change in zonal gradient in the tropical Indo-Pacific, both bucket-sampled SSTs and nighttime marine air temperatures (NMAT) show a weakening of the zonal gradient consistent with the subsurface temperature changes. All these findings fromindependent observations provide robust evidence for ocean-atmosphere coupling associatedwith the reduction in theWalker circulation over the last six decades. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52535
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: International Pacific Research Center, SOEST, University of Hawaii at Manoa, Honolulu, HI, United States; Climate Change Research Centre, University of New South Wales, Sydney, NSW, Australia; Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan; National Center for Atmospheric Research, Boulder, CO, United States
Recommended Citation:
Tokinaga H.,Xie S.-P.,Timmermann A.,et al. Regional patterns of tropical indo-pacific climate change: Evidence of the walker circulation weakening[J]. Journal of Climate,2012-01-01,25(5)