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Climate Model Errors over the South Indian Ocean Thermocline Dome and Their Effect on the Basin Mode of Interannual Variability
Li, Gen; Xie, Shang-Ping; Du, Yan; ligen@scsio.ac.cn
2015
Source PublicationJOURNAL OF CLIMATE
Volume28Issue:8Pages:3093-3098
Subtype0894-8755
AbstractAn open-ocean thermocline dome south of the equator is a striking feature of the Indian Ocean (IO) as a result of equatorial westerly winds. Over the thermocline dome, the El Nino-forced Rossby waves help sustain the IO basin (IOB) mode and offer climate predictability for the IO and surrounding countries. This study shows that a common equatorial easterly wind bias, by forcing a westward-propagating downwelling Rossby wave in the southern IO, induces too deep a thermocline dome over the southwestern IO (SWIO) in state-of-the-art climate models. Such a deep SWIO thermocline weakens the influence of subsurface variability on sea surface temperature (SST), reducing the IOB amplitude and possibly limiting the models' skill of regional climate prediction. To the extent that the equatorial easterly wind bias originates from errors of the South Asian summer monsoon, improving the monsoon simulation can lead to substantial improvements in simulating and predicting interannual variability in the IO.
Department[Li, Gen; Du, Yan] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China; [Li, Gen] Nanjing Univ Informat Sci & Technol, Minist Educ, Key Lab Meteorol Disaster, Nanjing, Jiangsu, Peoples R China; [Xie, Shang-Ping] Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA; [Xie, Shang-Ping] Ocean Univ China, Phys Oceanog Lab, Qingdao, Peoples R China ; LTO
Subject AreaMeteorology & Atmospheric Sciences
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/15106
Collection热带海洋环境国家重点实验室(LTO)
Corresponding Authorligen@scsio.ac.cn
Recommended Citation
GB/T 7714
Li, Gen,Xie, Shang-Ping,Du, Yan,et al. Climate Model Errors over the South Indian Ocean Thermocline Dome and Their Effect on the Basin Mode of Interannual Variability[J]. JOURNAL OF CLIMATE,2015,28(8):3093-3098.
APA Li, Gen,Xie, Shang-Ping,Du, Yan,&ligen@scsio.ac.cn.(2015).Climate Model Errors over the South Indian Ocean Thermocline Dome and Their Effect on the Basin Mode of Interannual Variability.JOURNAL OF CLIMATE,28(8),3093-3098.
MLA Li, Gen,et al."Climate Model Errors over the South Indian Ocean Thermocline Dome and Their Effect on the Basin Mode of Interannual Variability".JOURNAL OF CLIMATE 28.8(2015):3093-3098.
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