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A New Type of the Indian Ocean Dipole since the Mid-1970s
[Du, Yan; Wu, Yanling] Chinese Acad Sci, State Key Lab Trop Oceanog, S China Sea Inst Oceanol, Guangzhou, Guangdong, Peoples R China; [Cai, Wenju] CSIRO Marine & Atmospher Res, Aspendale, Vic, Australia; duyan@scsio.ac.cn
2013
Source PublicationJOURNAL OF CLIMATE
ISSN0894-8755
Volume26Issue:3Pages:959-972
AbstractThe tropical Indian Ocean dipole/zonal mode (IOD) is phase locked with the austral winter and spring seasons. This study describes three types of the IOD in terms of their peak time and duration. In particular, the authors focus on a new type that develops in May-June and matures in July-August, which is distinctively different from the canonical IOD, which may develop later and peak in September-November or persist from June to November. Such "unseasonable" IOD events are only observed since the mid-1970s, a period after which the tropical Indian Ocean has a closer relationship with the Pacific Ocean. The unseasonable IOD is an intrinsic mode of the Indian Ocean and occurs without an ensuing El Nino. A change in winds along the equator is identified as a major forcing. The wind change is in turn related to a weakening Walker circulation in the Indian Ocean sector in austral winter, which is in part forced by the rapid Indian Ocean warming. Thus, although the occurrence of the unseasonable IOD may be partially influenced by oceanic variability, the authors' results suggest an influence from the Indian Ocean warming. This suggestion, however, awaits further investigation using fully coupled climate models.
DepartmentLTO
Subject AreaMeteorology & Atmospheric Sciences
Funding OrganizationWe thank S.-P. Xie of IPRC/UH, T. Cowan and Ben Ng of MAR/CSIRO for useful discussions, and K. Liu and L. Zhang of LTO/SCSIO for help with satellite data processing. The SSM/I wind data were obtained from the Physical Oceanography Distributed Active Archive Center (http://podaac.jpl.nasa.gov). The NCEP reanalysis was provided by the NOAA/CIRES Climate Diagnostics Center (http://www.cdc.noaa.gov). The satellite merged SSH data were obtained from APDRC in IPRC-SOEST, University of Hawaii (http://apdrc.soest.hawaii.edu). Mentawai coral delta18O data and the DMI reconstruction are provided by N. J. Abram through the NOAA/NCDC Paleoclimatology Program (Data Contribution Series 2009-137). This work is supported by MoST (2010CB950302 and 2012CB955603), CAS (XDA05090404), and NSFC (41176024) and by the Australian Climate Change Science Program and the Southeast Australia Climate Initiative. ; We thank S.-P. Xie of IPRC/UH, T. Cowan and Ben Ng of MAR/CSIRO for useful discussions, and K. Liu and L. Zhang of LTO/SCSIO for help with satellite data processing. The SSM/I wind data were obtained from the Physical Oceanography Distributed Active Archive Center (http://podaac.jpl.nasa.gov). The NCEP reanalysis was provided by the NOAA/CIRES Climate Diagnostics Center (http://www.cdc.noaa.gov). The satellite merged SSH data were obtained from APDRC in IPRC-SOEST, University of Hawaii (http://apdrc.soest.hawaii.edu). Mentawai coral delta18O data and the DMI reconstruction are provided by N. J. Abram through the NOAA/NCDC Paleoclimatology Program (Data Contribution Series 2009-137). This work is supported by MoST (2010CB950302 and 2012CB955603), CAS (XDA05090404), and NSFC (41176024) and by the Australian Climate Change Science Program and the Southeast Australia Climate Initiative. ; We thank S.-P. Xie of IPRC/UH, T. Cowan and Ben Ng of MAR/CSIRO for useful discussions, and K. Liu and L. Zhang of LTO/SCSIO for help with satellite data processing. The SSM/I wind data were obtained from the Physical Oceanography Distributed Active Archive Center (http://podaac.jpl.nasa.gov). The NCEP reanalysis was provided by the NOAA/CIRES Climate Diagnostics Center (http://www.cdc.noaa.gov). The satellite merged SSH data were obtained from APDRC in IPRC-SOEST, University of Hawaii (http://apdrc.soest.hawaii.edu). Mentawai coral delta18O data and the DMI reconstruction are provided by N. J. Abram through the NOAA/NCDC Paleoclimatology Program (Data Contribution Series 2009-137). This work is supported by MoST (2010CB950302 and 2012CB955603), CAS (XDA05090404), and NSFC (41176024) and by the Australian Climate Change Science Program and the Southeast Australia Climate Initiative. ; We thank S.-P. Xie of IPRC/UH, T. Cowan and Ben Ng of MAR/CSIRO for useful discussions, and K. Liu and L. Zhang of LTO/SCSIO for help with satellite data processing. The SSM/I wind data were obtained from the Physical Oceanography Distributed Active Archive Center (http://podaac.jpl.nasa.gov). The NCEP reanalysis was provided by the NOAA/CIRES Climate Diagnostics Center (http://www.cdc.noaa.gov). The satellite merged SSH data were obtained from APDRC in IPRC-SOEST, University of Hawaii (http://apdrc.soest.hawaii.edu). Mentawai coral delta18O data and the DMI reconstruction are provided by N. J. Abram through the NOAA/NCDC Paleoclimatology Program (Data Contribution Series 2009-137). This work is supported by MoST (2010CB950302 and 2012CB955603), CAS (XDA05090404), and NSFC (41176024) and by the Australian Climate Change Science Program and the Southeast Australia Climate Initiative.
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Language英语
Funding OrganizationWe thank S.-P. Xie of IPRC/UH, T. Cowan and Ben Ng of MAR/CSIRO for useful discussions, and K. Liu and L. Zhang of LTO/SCSIO for help with satellite data processing. The SSM/I wind data were obtained from the Physical Oceanography Distributed Active Archive Center (http://podaac.jpl.nasa.gov). The NCEP reanalysis was provided by the NOAA/CIRES Climate Diagnostics Center (http://www.cdc.noaa.gov). The satellite merged SSH data were obtained from APDRC in IPRC-SOEST, University of Hawaii (http://apdrc.soest.hawaii.edu). Mentawai coral delta18O data and the DMI reconstruction are provided by N. J. Abram through the NOAA/NCDC Paleoclimatology Program (Data Contribution Series 2009-137). This work is supported by MoST (2010CB950302 and 2012CB955603), CAS (XDA05090404), and NSFC (41176024) and by the Australian Climate Change Science Program and the Southeast Australia Climate Initiative. ; We thank S.-P. Xie of IPRC/UH, T. Cowan and Ben Ng of MAR/CSIRO for useful discussions, and K. Liu and L. Zhang of LTO/SCSIO for help with satellite data processing. The SSM/I wind data were obtained from the Physical Oceanography Distributed Active Archive Center (http://podaac.jpl.nasa.gov). The NCEP reanalysis was provided by the NOAA/CIRES Climate Diagnostics Center (http://www.cdc.noaa.gov). The satellite merged SSH data were obtained from APDRC in IPRC-SOEST, University of Hawaii (http://apdrc.soest.hawaii.edu). Mentawai coral delta18O data and the DMI reconstruction are provided by N. J. Abram through the NOAA/NCDC Paleoclimatology Program (Data Contribution Series 2009-137). This work is supported by MoST (2010CB950302 and 2012CB955603), CAS (XDA05090404), and NSFC (41176024) and by the Australian Climate Change Science Program and the Southeast Australia Climate Initiative. ; We thank S.-P. Xie of IPRC/UH, T. Cowan and Ben Ng of MAR/CSIRO for useful discussions, and K. Liu and L. Zhang of LTO/SCSIO for help with satellite data processing. The SSM/I wind data were obtained from the Physical Oceanography Distributed Active Archive Center (http://podaac.jpl.nasa.gov). The NCEP reanalysis was provided by the NOAA/CIRES Climate Diagnostics Center (http://www.cdc.noaa.gov). The satellite merged SSH data were obtained from APDRC in IPRC-SOEST, University of Hawaii (http://apdrc.soest.hawaii.edu). Mentawai coral delta18O data and the DMI reconstruction are provided by N. J. Abram through the NOAA/NCDC Paleoclimatology Program (Data Contribution Series 2009-137). This work is supported by MoST (2010CB950302 and 2012CB955603), CAS (XDA05090404), and NSFC (41176024) and by the Australian Climate Change Science Program and the Southeast Australia Climate Initiative. ; We thank S.-P. Xie of IPRC/UH, T. Cowan and Ben Ng of MAR/CSIRO for useful discussions, and K. Liu and L. Zhang of LTO/SCSIO for help with satellite data processing. The SSM/I wind data were obtained from the Physical Oceanography Distributed Active Archive Center (http://podaac.jpl.nasa.gov). The NCEP reanalysis was provided by the NOAA/CIRES Climate Diagnostics Center (http://www.cdc.noaa.gov). The satellite merged SSH data were obtained from APDRC in IPRC-SOEST, University of Hawaii (http://apdrc.soest.hawaii.edu). Mentawai coral delta18O data and the DMI reconstruction are provided by N. J. Abram through the NOAA/NCDC Paleoclimatology Program (Data Contribution Series 2009-137). This work is supported by MoST (2010CB950302 and 2012CB955603), CAS (XDA05090404), and NSFC (41176024) and by the Australian Climate Change Science Program and the Southeast Australia Climate Initiative.
WOS IDWOS:000314695500018
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Cited Times:46[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/10934
Collection热带海洋环境国家重点实验室(LTO)
Corresponding Authorduyan@scsio.ac.cn
Recommended Citation
GB/T 7714
[Du, Yan,Wu, Yanling] Chinese Acad Sci, State Key Lab Trop Oceanog, S China Sea Inst Oceanol, Guangzhou, Guangdong, Peoples R China,[Cai, Wenju] CSIRO Marine & Atmospher Res, Aspendale, Vic, Australia,et al. A New Type of the Indian Ocean Dipole since the Mid-1970s[J]. JOURNAL OF CLIMATE,2013,26(3):959-972.
APA [Du, Yan,Wu, Yanling] Chinese Acad Sci, State Key Lab Trop Oceanog, S China Sea Inst Oceanol, Guangzhou, Guangdong, Peoples R China,[Cai, Wenju] CSIRO Marine & Atmospher Res, Aspendale, Vic, Australia,&duyan@scsio.ac.cn.(2013).A New Type of the Indian Ocean Dipole since the Mid-1970s.JOURNAL OF CLIMATE,26(3),959-972.
MLA [Du, Yan,et al."A New Type of the Indian Ocean Dipole since the Mid-1970s".JOURNAL OF CLIMATE 26.3(2013):959-972.
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