Tropical Biases in CMIP5 Multimodel Ensemble: The Excessive Equatorial Pacific Cold Tongue and Double ITCZ Problems
Li, G; Xie, SP; ligen@scsio.ac.cn
2014
发表期刊JOURNAL OF CLIMATE
ISSN0894-8755
卷号27期号:4页码:1765-1780
摘要Errors of coupled general circulation models (CGCMs) limit their utility for climate prediction and projection. Origins of and feedback for tropical biases are investigated in the historical climate simulations of 18 CGCMs from phase 5 of the Coupled Model Intercomparison Project (CMIP5), together with the available Atmospheric Model Intercomparison Project (AMIP) simulations. Based on an intermodel empirical orthogonal function (EOF) analysis of tropical Pacific precipitation, the excessive equatorial Pacific cold tongue and double intertropical convergence zone (ITCZ) stand out as the most prominent errors of the current generation of CGCMs. The comparison of CMIP-AMIP pairs enables us to identify whether a given type of errors originates from atmospheric models. The equatorial Pacific cold tongue bias is associated with deficient precipitation and surface easterly wind biases in the western half of the basin in CGCMs, but these errors are absent in atmosphere-only models, indicating that the errors arise from the interaction with the ocean via Bjerknes feedback. For the double ITCZ problem, excessive precipitation south of the equator correlates well with excessive downward solar radiation in the Southern Hemisphere (SH) midlatitudes, an error traced back to atmospheric model simulations of cloud during austral spring and summer. This extratropical forcing of the ITCZ displacements is mediated by tropical ocean-atmosphere interaction and is consistent with recent studies of ocean-atmospheric energy transport balance.
部门归属[Li, Gen] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Guangdong, Peoples R China ; [Li, Gen ; Xie, Shang-Ping] Univ Hawaii Manoa, Int Pacific Res Ctr, Honolulu, HI 96822 USA ; [Li, Gen ; 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, Shandong, Peoples R China
关键词Tropics Atmosphere-ocean Interaction Precipitation Climatology General Circulation Models Model Errors
学科领域Meteorology & Atmospheric Sciences
资助者National Basic Research Program of China [2012CB955603]; NSF [ATM-0854365]; NOAA ; National Basic Research Program of China [2012CB955603]; NSF [ATM-0854365]; NOAA ; National Basic Research Program of China [2012CB955603]; NSF [ATM-0854365]; NOAA ; National Basic Research Program of China [2012CB955603]; NSF [ATM-0854365]; NOAA
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收录类别sci
资助项目LTO
资助者National Basic Research Program of China [2012CB955603]; NSF [ATM-0854365]; NOAA ; National Basic Research Program of China [2012CB955603]; NSF [ATM-0854365]; NOAA ; National Basic Research Program of China [2012CB955603]; NSF [ATM-0854365]; NOAA ; National Basic Research Program of China [2012CB955603]; NSF [ATM-0854365]; NOAA
WOS记录号WOS:000330816100024
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文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/10577
专题热带海洋环境国家重点实验室(LTO)
通讯作者ligen@scsio.ac.cn
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Li, G,Xie, SP,ligen@scsio.ac.cn. Tropical Biases in CMIP5 Multimodel Ensemble: The Excessive Equatorial Pacific Cold Tongue and Double ITCZ Problems[J]. JOURNAL OF CLIMATE,2014,27(4):1765-1780.
APA Li, G,Xie, SP,&ligen@scsio.ac.cn.(2014).Tropical Biases in CMIP5 Multimodel Ensemble: The Excessive Equatorial Pacific Cold Tongue and Double ITCZ Problems.JOURNAL OF CLIMATE,27(4),1765-1780.
MLA Li, G,et al."Tropical Biases in CMIP5 Multimodel Ensemble: The Excessive Equatorial Pacific Cold Tongue and Double ITCZ Problems".JOURNAL OF CLIMATE 27.4(2014):1765-1780.
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