Impact of Indian Ocean Dipole on the salinity budget in the equatorial Indian Ocean
[Zhang Yuhong; Du Yan; Zheng Shaojun; Yang Yali; Cheng Xuhua] Chinese Acad Sci, State Key Lab Trop Oceanog, South China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China; Yang Yali] Univ Chinese Acad Sci, Beijing, Peoples R China; duyan@scsio.ac.cn
2013
发表期刊JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
ISSN2169-9275
卷号118期号:10页码:4911-4923
摘要Based on observations and ocean reanalysis, this study analyzes the variability of salinity and its related ocean dynamics in the equatorial Indian Ocean (IO). The results show significant interannual variability of salinity associated with the Indian Ocean Dipole (IOD) mode in the boreal fall. During the positive phase of IOD (pIOD), when anomalous easterly winds prevail, westward advection along the equator strengthens in summer, while the eastward advection associated with the Yoshida-Wyrtki Jet weakens in fall. Analysis of salinity budget indicates that salinity anomalies are mainly due to advection, of which zonal component is dominant. As zonal current anomalies are symmetric with respect to the equator, the equatorward large northern IO zonal salinity gradient is more important than the current anomalies in determining the asymmetric distribution of low-salinity advection. During the mature phase of pIOD, low-salinity water is advected westward, which in turn shoals the surface mixed layer, thereby providing a favorable condition for warmer sea-surface temperature in the western equatorial IO. During the decay phase of pIOD, low-salinity water is advected across the equator to the southwestern IO. When pIOD concurs along with El Nino, the strengthened off-equatorial anticyclonic circulations, which is associated with El Nino, advect low-salinity water poleward after the decay phase.
部门归属LTO
关键词Equatorial Indian Ocean Salinity Budget Indian Ocean Dipole Low-sss Advection
学科领域Oceanography
资助者We thank Tangdong Qu of IPRC/UH, Rui Xin Huang of WHOI for useful discussions and comments. The SODA data were obtained from APDRC in IPRC-SOEST, University of Hawaii (http://apdrc.soest.hawaii.edu). The Argo product was provided by the International Argo Program (http://www.argo.ucsd.edu). The CMAP precipitation was obtained from NOAA's Climate Prediction Center (http://www.cpc.ncep.noaa.gov). The OAFlux was provided by WHOI OAFlux Project of Woods Hole Oceanographic Institution (http://oaflux.whoi.edu). The OSCAR currents were obtained from NOAA's Ocean Surface Current Analyses Real time (http://www.oscar.noaa.gov/index.html). The ERSST was provided by NOAA's National Climate Data Center (http://www.ncdc.noaa.gov). This work was supported by the National Basic Research Program of China (2012CB955603, 2010CB950302) and the Natural Science Foundation of China (41176024, 41176023). ; We thank Tangdong Qu of IPRC/UH, Rui Xin Huang of WHOI for useful discussions and comments. The SODA data were obtained from APDRC in IPRC-SOEST, University of Hawaii (http://apdrc.soest.hawaii.edu). The Argo product was provided by the International Argo Program (http://www.argo.ucsd.edu). The CMAP precipitation was obtained from NOAA's Climate Prediction Center (http://www.cpc.ncep.noaa.gov). The OAFlux was provided by WHOI OAFlux Project of Woods Hole Oceanographic Institution (http://oaflux.whoi.edu). The OSCAR currents were obtained from NOAA's Ocean Surface Current Analyses Real time (http://www.oscar.noaa.gov/index.html). The ERSST was provided by NOAA's National Climate Data Center (http://www.ncdc.noaa.gov). This work was supported by the National Basic Research Program of China (2012CB955603, 2010CB950302) and the Natural Science Foundation of China (41176024, 41176023). ; We thank Tangdong Qu of IPRC/UH, Rui Xin Huang of WHOI for useful discussions and comments. The SODA data were obtained from APDRC in IPRC-SOEST, University of Hawaii (http://apdrc.soest.hawaii.edu). The Argo product was provided by the International Argo Program (http://www.argo.ucsd.edu). The CMAP precipitation was obtained from NOAA's Climate Prediction Center (http://www.cpc.ncep.noaa.gov). The OAFlux was provided by WHOI OAFlux Project of Woods Hole Oceanographic Institution (http://oaflux.whoi.edu). The OSCAR currents were obtained from NOAA's Ocean Surface Current Analyses Real time (http://www.oscar.noaa.gov/index.html). The ERSST was provided by NOAA's National Climate Data Center (http://www.ncdc.noaa.gov). This work was supported by the National Basic Research Program of China (2012CB955603, 2010CB950302) and the Natural Science Foundation of China (41176024, 41176023). ; We thank Tangdong Qu of IPRC/UH, Rui Xin Huang of WHOI for useful discussions and comments. The SODA data were obtained from APDRC in IPRC-SOEST, University of Hawaii (http://apdrc.soest.hawaii.edu). The Argo product was provided by the International Argo Program (http://www.argo.ucsd.edu). The CMAP precipitation was obtained from NOAA's Climate Prediction Center (http://www.cpc.ncep.noaa.gov). The OAFlux was provided by WHOI OAFlux Project of Woods Hole Oceanographic Institution (http://oaflux.whoi.edu). The OSCAR currents were obtained from NOAA's Ocean Surface Current Analyses Real time (http://www.oscar.noaa.gov/index.html). The ERSST was provided by NOAA's National Climate Data Center (http://www.ncdc.noaa.gov). This work was supported by the National Basic Research Program of China (2012CB955603, 2010CB950302) and the Natural Science Foundation of China (41176024, 41176023).
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资助者We thank Tangdong Qu of IPRC/UH, Rui Xin Huang of WHOI for useful discussions and comments. The SODA data were obtained from APDRC in IPRC-SOEST, University of Hawaii (http://apdrc.soest.hawaii.edu). The Argo product was provided by the International Argo Program (http://www.argo.ucsd.edu). The CMAP precipitation was obtained from NOAA's Climate Prediction Center (http://www.cpc.ncep.noaa.gov). The OAFlux was provided by WHOI OAFlux Project of Woods Hole Oceanographic Institution (http://oaflux.whoi.edu). The OSCAR currents were obtained from NOAA's Ocean Surface Current Analyses Real time (http://www.oscar.noaa.gov/index.html). The ERSST was provided by NOAA's National Climate Data Center (http://www.ncdc.noaa.gov). This work was supported by the National Basic Research Program of China (2012CB955603, 2010CB950302) and the Natural Science Foundation of China (41176024, 41176023). ; We thank Tangdong Qu of IPRC/UH, Rui Xin Huang of WHOI for useful discussions and comments. The SODA data were obtained from APDRC in IPRC-SOEST, University of Hawaii (http://apdrc.soest.hawaii.edu). The Argo product was provided by the International Argo Program (http://www.argo.ucsd.edu). The CMAP precipitation was obtained from NOAA's Climate Prediction Center (http://www.cpc.ncep.noaa.gov). The OAFlux was provided by WHOI OAFlux Project of Woods Hole Oceanographic Institution (http://oaflux.whoi.edu). The OSCAR currents were obtained from NOAA's Ocean Surface Current Analyses Real time (http://www.oscar.noaa.gov/index.html). The ERSST was provided by NOAA's National Climate Data Center (http://www.ncdc.noaa.gov). This work was supported by the National Basic Research Program of China (2012CB955603, 2010CB950302) and the Natural Science Foundation of China (41176024, 41176023). ; We thank Tangdong Qu of IPRC/UH, Rui Xin Huang of WHOI for useful discussions and comments. The SODA data were obtained from APDRC in IPRC-SOEST, University of Hawaii (http://apdrc.soest.hawaii.edu). The Argo product was provided by the International Argo Program (http://www.argo.ucsd.edu). The CMAP precipitation was obtained from NOAA's Climate Prediction Center (http://www.cpc.ncep.noaa.gov). The OAFlux was provided by WHOI OAFlux Project of Woods Hole Oceanographic Institution (http://oaflux.whoi.edu). The OSCAR currents were obtained from NOAA's Ocean Surface Current Analyses Real time (http://www.oscar.noaa.gov/index.html). The ERSST was provided by NOAA's National Climate Data Center (http://www.ncdc.noaa.gov). This work was supported by the National Basic Research Program of China (2012CB955603, 2010CB950302) and the Natural Science Foundation of China (41176024, 41176023). ; We thank Tangdong Qu of IPRC/UH, Rui Xin Huang of WHOI for useful discussions and comments. The SODA data were obtained from APDRC in IPRC-SOEST, University of Hawaii (http://apdrc.soest.hawaii.edu). The Argo product was provided by the International Argo Program (http://www.argo.ucsd.edu). The CMAP precipitation was obtained from NOAA's Climate Prediction Center (http://www.cpc.ncep.noaa.gov). The OAFlux was provided by WHOI OAFlux Project of Woods Hole Oceanographic Institution (http://oaflux.whoi.edu). The OSCAR currents were obtained from NOAA's Ocean Surface Current Analyses Real time (http://www.oscar.noaa.gov/index.html). The ERSST was provided by NOAA's National Climate Data Center (http://www.ncdc.noaa.gov). This work was supported by the National Basic Research Program of China (2012CB955603, 2010CB950302) and the Natural Science Foundation of China (41176024, 41176023).
WOS记录号WOS:000327380100012
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条目标识符http://ir.scsio.ac.cn/handle/344004/10876
专题热带海洋环境国家重点实验室(LTO)
通讯作者duyan@scsio.ac.cn
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[Zhang Yuhong,Du Yan,Zheng Shaojun,et al. Impact of Indian Ocean Dipole on the salinity budget in the equatorial Indian Ocean[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2013,118(10):4911-4923.
APA [Zhang Yuhong.,Du Yan.,Zheng Shaojun.,Yang Yali.,Cheng Xuhua] Chinese Acad Sci, State Key Lab Trop Oceanog, South China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China.,...&duyan@scsio.ac.cn.(2013).Impact of Indian Ocean Dipole on the salinity budget in the equatorial Indian Ocean.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,118(10),4911-4923.
MLA [Zhang Yuhong,et al."Impact of Indian Ocean Dipole on the salinity budget in the equatorial Indian Ocean".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 118.10(2013):4911-4923.
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