DOI: 10.1175/JCLI-D-17-0271.1
Scopus记录号: 2-s2.0-85040609181
论文题名: Multiple time scale variability of the sea surface salinity dipole mode in the tropical Indian Ocean
作者: Zhang Y. ; Du Y. ; Feng M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 1 起始页码: 283
结束页码: 296
语种: 英语
英文关键词: Atmosphere-ocean interaction
; Decadal variability
; Indian Ocean
; Interannual variability
; Ocean dynamics
; Tropical variability
Scopus关键词: Advection
; Atmospheric thermodynamics
; Climate change
; Climatology
; Stream flow
; Surface waters
; Time measurement
; Tropics
; Atmosphere-ocean interactions
; Decadal variability
; Indian ocean
; Interannual variability
; Ocean dynamics
; Tropical variability
; Oceanography
; air-sea interaction
; annual variation
; climate variation
; decadal variation
; El Nino-Southern Oscillation
; Indian Ocean Dipole
; sea surface salinity
; Walker circulation
; Australia
; Indian Ocean
; Indian Ocean (Tropical)
; Western Australia
; Pomatiopsis californica
英文摘要: In this study, multiple time scale variability of the salinity dipole mode in the tropical Indian Ocean (S-IOD) is revealed based on the 57-yr Ocean Reanalysis System 4 (ORAS4) sea surface salinity (SSS) reanalysis product and associated observations. On the interannual time scale, S-IOD is highly correlated with strong Indian Ocean dipole (IOD) and ENSO variability, with ocean advection forced by wind anomalies along the equator and precipitation anomalies in the southeastern tropical Indian Ocean (IO) dominating the SSS variations in the northern and southern poles of the S-IOD, respectively. S-IOD variability is also associated with the decadal modulation of the Indo-Pacific Walker circulation, with a stronger signature at its southern pole. Decadal variations of the equatorial IO winds and precipitations in the central IO force zonal ocean advection anomalies that contribute to the SSS variability in the northern pole of S-IOD on the decadal time scale. Meanwhile, oceanic dynamics dominates the SSS variability in the southern pole of S-IOD off Western Australia. Anomalous ocean advection transports the fresher water from low latitudes to the region off Western Australia, with additional contributions from the Indonesian Throughflow. Furthermore, the southern pole of S-IOD is associated with the thermocline variability originated from the tropical northwestern Pacific through the waveguide in the Indonesian Seas, forced by decadal Pacific climate variability. A deepening (shoaling) thermocline strengthens (weakens) the southward advection of surface freshwater into the southern pole of S-IOD and contributes to the high (low) SSS signatures off Western Australia. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111712
Appears in Collections: 气候减缓与适应
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作者单位: State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China; Commonwealth Scientific and Industrial Research Organisation, Oceans and Atmosphere, Indian Ocean Marine Research Centre, Crawley, WA, Australia; Centre for Southern Hemisphere Oceans Research, Commonwealth Scientific and Industrial Research Organisation, Oceans and Atmosphere, Hobart, TAS, Australia
Recommended Citation:
Zhang Y.,Du Y.,Feng M.. Multiple time scale variability of the sea surface salinity dipole mode in the tropical Indian Ocean[J]. Journal of Climate,2018-01-01,31(1)