DOI: 10.1175/JCLI-D-15-0655.1
Scopus记录号: 2-s2.0-84977551923
论文题名: All-season climatology and variability of atmospheric river frequencies over the North Pacific
作者: Mundhenk B.D. ; Barnes E.A. ; Maloney E.D.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 13 起始页码: 4885
结束页码: 4903
语种: 英语
Scopus关键词: Atmospheric pressure
; Location
; NASA
; Climate variability
; Eddies
; Geographic location
; North Pacific Ocean
; Oscillations
; Seasonal variability
; Variability
; Climatology
; algorithm
; atmospheric structure
; climate oscillation
; climate variation
; climatology
; eddy
; seasonal variation
; Pacific Ocean
; Pacific Ocean (North)
英文摘要: Recent work on atmospheric rivers (ARs) has led to a characterization of these impactful features as primarily cold-season phenomena. Here, an all-season analysis of AR incidence in the North Pacific basin is performed for the period spanning 1979-2014 using the NASA Modern-Era Retrospective Analysis for Research and Applications (MERRA) reanalysis dataset. An occurrence-based detection algorithm is developed and employed to identify and characterize ARs in instantaneous fields of anomalous vertically integrated water vapor transport. The all-season climatology and variability of AR frequencies due to the seasonal cycle, the El Niño-Southern Oscillation (ENSO), the Madden-Julian oscillation (MJO), and their interactions are presented based on composites of the detected features. The results highlight that ARs exist throughout the year over the North Pacific, although their preferred locations shift substantially throughout the year. This seasonal cycle manifests itself as northward and westward displacement of ARs during the Northern Hemisphere warm seasons, rather than an absolute change in the number of ARs within the domain. It is also shown that changes to the North Pacific mean-state due to ENSO and the MJO may enhance or completely offset the seasonal cycle of AR activity, but that such influences on AR frequencies vary greatly based on location. © 2016 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50277
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States
Recommended Citation:
Mundhenk B.D.,Barnes E.A.,Maloney E.D.. All-season climatology and variability of atmospheric river frequencies over the North Pacific[J]. Journal of Climate,2016-01-01,29(13)