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The 30-50-Day Intraseasonal Oscillation of SST and Precipitation in the South Tropical Indian Ocean
Liang, Y; Du, Y; Zhang, LY; Zheng, XT; Qiu, S; liangyun1996@126.com; duyan@scsio.ac.cn; lyzhang@scsio.ac.cn; zhengxt@ouc.edu.cn; qasisqius@163.com
2018
Source PublicationATMOSPHERE
Volume9Issue:2Pages:-69
AbstractThe Sea Surface Temperature (SST) in the South Tropical Indian Ocean (STIO) displays significant intraseasonal oscillation (ISO) in two regions. A striking 30-50-day ISO found over the east of thermocline ridge (Region A, 80-90 degrees E, 6-12 degrees S), as identified by the Empirical Mode Decomposition (EMD) method, is distinguished from the SST signature over the thermocline ridge (Region B, 52.5-65 degrees E, 6-13 degrees S). The 30-50-day ISO of SST in the Region A is active in March-May (MAM) and suppressed in September-November (SON). Meanwhile, a 30-50-day ISO of precipitation correlates with the SST over the Region A. SST leads precipitation by 10 days, implying a pronounced ocean-atmosphere interaction at the intraseasonal timescale, especially the oceanic feedback to the atmosphere during Madden-Julian Oscillation (MJO) events. Analysis on mechanism of the ISO manifests heat fluxes are critical to the development of the intraseasonal SST variability. The local thermocline in Region A, as the shallowest in MAM and the thickest in SON, is likely to modulate the strength of ISO and contribute to its sustainability. It suggests that thermocline plays a more important role in Region A than in Region B, leading to the difference between the two regions.
Department[Liang, Yun; Du, Yan; Zhang, Lianyi; Qiu, Shuang] Chinese Acad Sci, State Key Lab Trop Oceanog, South China Sea Inst Oceanol, 164 West Xingang Rd, Guangzhou 510301, Guangdong, Peoples R China; [Liang, Yun; Du, Yan; Zhang, Lianyi; Qiu, Shuang] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Zheng, Xiaotong] Ocean Univ China, Coll Ocean & Atmospher Sci, Qingdao 266100, Peoples R China
KeywordSouth Tropical Indian Ocean Intraseasonal Oscillation Sst Precipitation Thermocline 30-50-day
Subject AreaMeteorology & Atmospheric Sciences
Funding ProjectLTO
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/17100
Collection热带海洋环境国家重点实验室(LTO)
Corresponding Authorliangyun1996@126.com; duyan@scsio.ac.cn; lyzhang@scsio.ac.cn; zhengxt@ouc.edu.cn; qasisqius@163.com
Recommended Citation
GB/T 7714
Liang, Y,Du, Y,Zhang, LY,et al. The 30-50-Day Intraseasonal Oscillation of SST and Precipitation in the South Tropical Indian Ocean[J]. ATMOSPHERE,2018,9(2):-69.
APA Liang, Y.,Du, Y.,Zhang, LY.,Zheng, XT.,Qiu, S.,...&qasisqius@163.com.(2018).The 30-50-Day Intraseasonal Oscillation of SST and Precipitation in the South Tropical Indian Ocean.ATMOSPHERE,9(2),-69.
MLA Liang, Y,et al."The 30-50-Day Intraseasonal Oscillation of SST and Precipitation in the South Tropical Indian Ocean".ATMOSPHERE 9.2(2018):-69.
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