DOI: 10.1007/s00382-013-1839-0
Scopus记录号: 2-s2.0-84888046916
论文题名: Reproducibility of precipitation distribution over the tropical oceans in CMIP5 multi-climate models compared to CMIP3
作者: Hirota N. ; Takayabu Y.N.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2013
卷: 41, 期: 2017-11-12 起始页码: 2909
结束页码: 2920
语种: 英语
英文关键词: CMIP5
; Cold tongue bias
; Double ITCZ
; Precipitation distribution
; Tropical climate
英文摘要: Reproducibility of precipitation distribution over the tropical oceans for the recent dataset of the Coupled Model Intercomparison Project phase 5 (CMIP5) is investigated and compared to CMIP3. The Taylor skill score for the reproducibility of the CMIP5 multi-model ensemble mean (0.64) is slightly higher than that of CMIP3 (0.60), but the difference is not statistically significant. Still, there is some evidences that the double intertropical convergence zone (ITCZ) bias is mitigated from CMIP3 to CMIP5, whereas the cold tongue bias remains similar. An inter-model empirical orthogonal function analysis shows that these two biases are closely related to the dominant inter-model discrepancies of precipitation patterns. The two biases are attributed to two factors, respectively. In the CMIP5 models with the prominent double ITCZ, the deep convection is not sensitive enough to environmental air humidity at the lower-mid troposphere, as is in CMIP3. Thus, the deep convection is not suppressed even over the dry subsidence region of the southeastern Pacific, forming the double ITCZ bias. Conversely, models with the severe cold tongue bias have lower ocean model resolution with too strong equatorial trades. Therefore, proper representation of the sensitivity of deep convection to humidity and higher resolution of the ocean models with better equatorial trades are important for reducing the double ITCZ and the cold tongue biases. © 2013 The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54701
Appears in Collections: 过去全球变化的重建
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作者单位: Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8568, Japan
Recommended Citation:
Hirota N.,Takayabu Y.N.. Reproducibility of precipitation distribution over the tropical oceans in CMIP5 multi-climate models compared to CMIP3[J]. Climate Dynamics,2013-01-01,41(2017-11-12)