DOI: 10.1175/JCLI-D-15-0807.1
Scopus记录号: 2-s2.0-84987937794
论文题名: Enhanced influences of tropical atlantic SST on WNP-NIO atmosphere-ocean coupling since the early 1980s
作者: Chang T.-C. ; Hsu H.-H. ; Hong C.-C.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 18 起始页码: 6509
结束页码: 6525
语种: 英语
Scopus关键词: Atmospheric temperature
; Atmospheric thermodynamics
; Climate change
; Heat storage
; Surface waters
; Tropics
; Wind effects
; Atlantic Ocean
; Atmosphere-ocean interactions
; General circulation model
; Geographic location
; Interannual variability
; Singular vectors
; Statistical techniques
; Teleconnections
; Variability
; Oceanography
英文摘要: This paper reports a new finding and related mechanism: the forcing effect of the tropical Atlantic (TA) sea surface temperature (SST) on the atmosphere-ocean coupling in the western North Pacific (WNP) and northern Indian Ocean (NIO). Since the early 1980s, the TA SST has increased and, notably, exhibited an enhanced interannual statistical relationship with the WNP subtropical high and NIO SST in boreal summer. Empirical diagnostics reveal the following spatial pattern linking the TA SST and the atmosphere-ocean coupling in the Pacific and Indian Ocean: 1) a cyclonic (anticyclonic) circulation pair straddling the equator over the eastern Pacific, 2) an anticyclonic (cyclonic) circulation pair straddling the equator in the WNP and Indian Ocean, 3) overturning circulation with ascending (descending) and descending (ascending) anomalies over the TA and tropical western Pacific, respectively, and 4) positive (negative) SST anomaly in the TA and NIO. The characteristics of this pattern are consistent with those of a WNP-NIO coupling pattern identified in a previous study. Empirical diagnostics and numerical simulations indicate that the TA SST serves as a forcing to induce low-level divergence and streamfunction anomalies in the Indian Ocean and the western Pacific. The latter in turn induces anomalous heat storage in the NIO and enhances the WNP-NIO coupling system, which is an intrinsic pattern engendered by the atmosphere-ocean interaction in the region. Without the remote influence of the TA SST forcing, the WNP-NIO coupling pattern and its impacts on the summer monsoon and TC variability in South Asia, East Asia, and the WNP would be considerably less significant than observed. © 2016 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50063
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Research Center for Environmental Changes, Academia Sinica, Taipei, Taiwan; Department of Earth and Life, University of Taipei, Taipei, Taiwan
Recommended Citation:
Chang T.-C.,Hsu H.-H.,Hong C.-C.. Enhanced influences of tropical atlantic SST on WNP-NIO atmosphere-ocean coupling since the early 1980s[J]. Journal of Climate,2016-01-01,29(18)