DOI: 10.1175/JCLI-D-14-00515.1
Scopus记录号: 2-s2.0-84945952182
论文题名: Cross-seasonal influence of the December-February southern hemisphere annular mode on march-may meridional circulation and precipitation
作者: Zheng F. ; Li J. ; Wang L. ; Xie F. ; Li X.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 17 起始页码: 6859
结束页码: 6881
语种: 英语
Scopus关键词: Atmospheric thermodynamics
; Climate change
; Earth atmosphere
; Oceanography
; Precipitation (chemical)
; Rain
; Annular mode
; Antarctic oscillation
; Atmosphere-ocean interactions
; Atmospheric general circulation models
; Interannual variability
; Large-scale precipitation
; Meridional overturning circulations
; Southern hemisphere annular modes
; Tropics
; air-sea interaction
; Antarctic Oscillation
; meridional circulation
; precipitation (climatology)
; sea surface temperature
; Southern Hemisphere
; temperature anomaly
英文摘要: New evidence suggests that interannual variability in zonal-mean meridional circulation and precipitation can be partially attributed to the Southern Hemisphere annular mode (SAM), the dominant mode of climate variability in the Southern Hemisphere (SH) extratropics. A cross-seasonal correlation exists between the December-February (DJF) SAM and March-May (MAM) zonal-mean meridional circulation and precipitation. This correlation is not confined to the SH: it also extends to the Northern Hemisphere (NH) subtropics. When the preceding DJF SAM is positive, counterclockwise, and clockwise meridional cells, accompanied by less and more precipitation, occur alternately between the SH middle latitudes and NH subtropics in MAM. In particular, less precipitation occurs in the SH middle latitudes, the SH tropics, and the NH subtropics, but more precipitation occurs in the SH subtropics and the NH tropics. A framework is built to explain the cross-seasonal impact of SAM-related SST anomalies. Evidence indicates that the DJF SAM tends to lead to dipolelike SST anomalies in the SH extratropics, which are referred to in this study as the SH ocean dipole (SOD). The DJF SOD can persist until the following MAM when it begins to modulate MAM meridional circulation and large-scale precipitation. Atmospheric general circulation model simulations further verify that MAM meridional circulation between the SH middle latitudes and the northern subtropics responds to the MAM SOD. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50475
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; College of Global Change and Earth System Science, Beijing Normal University, Beijing, China; Joint Center for Global Change Studies, Beijing, China; Key Laboratory of Research on Marine Hazards Forecasting, National Marine Environmental Forecasting Center, Beijing, China
Recommended Citation:
Zheng F.,Li J.,Wang L.,et al. Cross-seasonal influence of the December-February southern hemisphere annular mode on march-may meridional circulation and precipitation[J]. Journal of Climate,2015-01-01,28(17)