IOCAS-IR  > 海洋环流与波动重点实验室
Decadal SST Variability in the Southeast Indian Ocean and Its Impact on Regional Climate
Li, Yuanlong1,2,3,4; Han, Weiqing5; Zhang, Lei5; Wang, Fan1,3,4
2019-10-01
Source PublicationJOURNAL OF CLIMATE
ISSN0894-8755
Volume32Issue:19Pages:6299-6318
Corresponding AuthorLi, Yuanlong(liyuanlong@qdio.ac.cn)
AbstractThe southeast Indian Ocean (SEIO) exhibits decadal variability in sea surface temperature (SST) with amplitudes of similar to 0.2-0.3 K and covaries with the central Pacific (r = -0.63 with Nino-4 index for 1975-2010). In this study, the generation mechanisms of decadal SST variability are explored using an ocean general circulation model (OGCM), and its impact on atmosphere is evaluated using an atmospheric general circulation model (AGCM). OGCM experiments reveal that Pacific forcing through the Indonesian Throughflow explains <20% of the total SST variability, and the contribution of local wind stress is also small. These wind-forced anomalies mainly occur near the Western Australian coast. The majority of SST variability is attributed to surface heat fluxes. The reduced upward turbulent heat flux (Q(T); latent plus sensible heat flux), owing to decreased wind speed and anomalous warm, moist air advection, is essential for the growth of warm SST anomalies (SSTAs). The warming causes reduction of low cloud cover that increases surface shortwave radiation (SWR) and further promotes the warming. However, the resultant high SST, along with the increased wind speed in the offshore area, enhances the upward Q(T) and begins to cool the ocean. Warm SSTAs co-occur with cyclonic low-level wind anomalies in the SEIO and enhanced rainfall over Indonesia and northwest Australia. AGCM experiments suggest that although the tropical Pacific SST has strong effects on the SEIO region through atmospheric teleconnection, the cyclonic winds and increased rainfall are mainly caused by the SEIO warming through local air-sea interactions.
KeywordOcean dynamics Sea surface temperature Decadal variability
DOI10.1175/JCLI-D-19-0180.1
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China (NSFC)[41806001] ; National Natural Science Foundation of China (NSFC)[41776001] ; National Program on Global Change and Air-Sea Interaction[GASIIPOVAI-01-01] ; NSF-AGS[1446480] ; NSF-OCE[1658132]
WOS Research AreaMeteorology & Atmospheric Sciences
WOS SubjectMeteorology & Atmospheric Sciences
WOS IDWOS:000482950800007
PublisherAMER METEOROLOGICAL SOC
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/162775
Collection海洋环流与波动重点实验室
Corresponding AuthorLi, Yuanlong
Affiliation1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Ocean Circulat & Waves, Qingdao, Shandong, Peoples R China
2.CAS Ctr Excellence Quaternary Sci & Global Change, Xian, Shaanxi, Peoples R China
3.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Shandong, Peoples R China
4.Qingdao Natl Lab Marine Sci & Technol, Funct Lab Ocean Dynam & Climate, Qingdao, Shandong, Peoples R China
5.Univ Colorado, Dept Atmospher & Ocean Sci, Boulder, CO 80309 USA
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Li, Yuanlong,Han, Weiqing,Zhang, Lei,et al. Decadal SST Variability in the Southeast Indian Ocean and Its Impact on Regional Climate[J]. JOURNAL OF CLIMATE,2019,32(19):6299-6318.
APA Li, Yuanlong,Han, Weiqing,Zhang, Lei,&Wang, Fan.(2019).Decadal SST Variability in the Southeast Indian Ocean and Its Impact on Regional Climate.JOURNAL OF CLIMATE,32(19),6299-6318.
MLA Li, Yuanlong,et al."Decadal SST Variability in the Southeast Indian Ocean and Its Impact on Regional Climate".JOURNAL OF CLIMATE 32.19(2019):6299-6318.
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