DOI: 10.1175/JCLI-D-16-0488.1
Scopus记录号: 2-s2.0-85021134756
论文题名: Distinct patterns of tropical pacific SST anomaly and their impacts on North American climate
作者: Guo Y. ; Ting M. ; Wen Z. ; Lee D.E.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 14 起始页码: 5221
结束页码: 5241
语种: 英语
Scopus关键词: Atmospheric temperature
; Climate change
; Climatology
; Conformal mapping
; Meteorology
; Nickel
; Orthogonal functions
; Surface properties
; Tropics
; Atmospheric circulation
; Atmospheric variability
; Empirical orthogonal function analysis
; ENSO
; National center for atmospheric researches
; Nonlinear feature extraction
; Precipitation anomalies
; Sea surface temperature anomalies
; Oceanography
英文摘要: A neural-network-based cluster technique, the so-called self-organizing map (SOM), was performed to extract distinct sea surface temperature (SST) anomaly patterns during boreal winter. The SOM technique has advantages in nonlinear feature extraction compared to the commonly used empirical orthogonal function analysis and is widely used in meteorology. The eight distinguishable SOM patterns so identified represent three La Niña-like patterns, two near-normal patterns, and three El Niño-like patterns. These patterns show the varied amplitude and location of the SST anomalies associated with El Niño and La Niña, such as the central Pacific (CP) and eastern Pacific (EP) El Niño. The impact of each distinctive SOM pattern on wintermean surface temperature and precipitation changes over North America was examined. Based on composite maps with observational data, each SOM pattern corresponds to a distinguishable spatial structure of temperature and precipitation anomaly over North America, which seems to result from differing wave train patterns, extending from the tropics to mid-high latitudes induced by longitudinally shifted tropical heating. The corresponding teleconnection as represented by the National Center for Atmospheric Research Community Atmospheric Model, version 4 (CAM4), was compared with the observational results. It was found that the 16-member ensemble average of the CAM4 experiments with prescribed SST can reproduce the observed atmospheric circulation responses to the different SST SOM patterns, which suggests that the circulation differences are largely SST driven rather than due to internal atmospheric variability. © 2017 American Meteorological Society. 资助项目: NSF, National Science Foundation
; NSFC, National Natural Science Foundation of China
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/48840
Appears in Collections: 气候变化与战略
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作者单位: Center for Monsoon and Environment Research, School of Atmospheric Sciences, Sun Yat-sen University, Guangzhou, China; Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States
Recommended Citation:
Guo Y.,Ting M.,Wen Z.,et al. Distinct patterns of tropical pacific SST anomaly and their impacts on North American climate[J]. Journal of Climate,2017-01-01,30(14)