DOI: 10.1007/s00382-016-3251-z
Scopus记录号: 2-s2.0-84978045082
论文题名: Twentieth century ENSO-related precipitation mean states in twentieth century reanalysis, reconstructed precipitation and CMIP5 models
作者: Dai N. ; Arkin P.A.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2017
卷: 48, 期: 2017-09-10 起始页码: 3061
结束页码: 3083
语种: 英语
英文关键词: Biases
; CMIP5 models
; Double-ITCZs
; Dry equator
; ENSO
; Precipitation
; Spatial fields
; Twentieth century reanalysis
英文摘要: El Niño–Southern Oscillation (ENSO)-related precipitation during the entire twentieth century is compared among the twentieth century reanalysis (20CR), a statistically reconstructed precipitation dataset (REC) and 30 Coupled Model Intercomparison Project Phase 5 (CMIP5) models. Empirical orthogonal functions, ENSO-related precipitation composites based on sea surface temperature (SST)-constructed ENSO index and singular value decomposition (SVD) are employed to extract ENSO-related precipitation/SST signals in each dataset. With the background trend being removed in all of the data, our results show that the REC and the 20CR resemble both in their precipitation climatology and ENSO-related precipitation results. The biases in the CMIP5 models precipitation climatology such as dry equator over the Pacific Ocean, “double-intertropical convergence zones (ITCZs)” and overly zonal Southern Pacific convergence zone (SPCZ) are major reasons for lowering spatial correlations with the REC and the 20CR precipitation climatology. Two groups of CMIP5 models are built based on severity of these biases in their precipitation background and the spatial correlations of ENSO-related precipitation with the observations. Compared with the group with more severe biases in its precipitation climatology, the group with smaller biases tends to produce more ENSO-like precipitation patterns, simulate more realistic mean magnitude and seasonal variability of ENSO precipitation signals, as well as generating better ENSO-related SST/precipitation correlation patterns produced in its SVD analysis. The ENSO-related precipitation biases in the CMIP5 models over the western Pacific and Indian Ocean, as well as the equatorial Pacific, are strongly related with their precipitation climatology biases over these regions. The ENSO-related precipitation biases over the off-equator eastern Pacific Ocean are associated with both the “double-ITCZs” biases in the precipitation climatology and the ENSO-related SST biases in the models. © 2016, Springer-Verlag Berlin Heidelberg. 资助项目: USMF, University of Maryland Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53246
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Atmospheric and Oceanic Science, University of Maryland, College Park, MD, United States; Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, United States; Cooperative Institute for Climate and Satellites – Maryland, Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, United States
Recommended Citation:
Dai N.,Arkin P.A.. Twentieth century ENSO-related precipitation mean states in twentieth century reanalysis, reconstructed precipitation and CMIP5 models[J]. Climate Dynamics,2017-01-01,48(2017-09-10)