DOI: 10.1175/JCLI-D-15-0092.1
Scopus记录号: 2-s2.0-84966288705
论文题名: The Influence of the MJO on the intraseasonal variability of Northern Hemisphere spring snow depth
作者: Barrett B.S. ; Henderson G.R. ; Werling J.S.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 18 起始页码: 7250
结束页码: 7262
语种: 英语
Scopus关键词: Atmospheric temperature
; Mechanical waves
; Snow melting systems
; Background flow
; Intraseasonal variability
; Northern Hemispheres
; Precipitation process
; Rossby wave
; Spearman rank correlation
; Statistical relationship
; Surface air temperatures
; Snow
; air temperature
; atmospheric circulation
; atmospheric convection
; Madden-Julian oscillation
; Northern Hemisphere
; precipitation (climatology)
; Rossby wave
; seasonal variation
; snow
; surface temperature
; Eurasia
; North America
英文摘要: Intraseasonal variability in springtime Northern Hemisphere daily snow depth change (ΔSD) by phase of the MJO was explored in this study. Principal findings of the relationship between ΔSD and the MJO included the following: 1) Statistically significant regions of lagged ΔSD anomalies for multiple phases of the MJO were found in March, April, and May in both North America and Eurasia. 2) In each month, lagged ΔSD anomalies were physically supported by corresponding lagged anomalies of 500-hPa height (Z500) and surface air temperature (SAT). Spearman rank correlation coefficients indicated a moderate to strong relationship between both Z500 and ΔSD and SAT and ΔSD in both Eurasia and North America for phases 5 and 7 in March. In April, a moderately strong relationship between Z500 and ΔSD was found over Eurasia for phase 5, but the relationship between SAT and ΔSD was weak. In May, correlations between ΔSD and both Z500 and SAT over a hemisphere-wide latitude band from 60° to 75°N were close to -0.5 and -0.4, respectively. Given the strength of these statistical relationships, the following physical pathway is proposed for intraseasonal variability of spring snow depth changes: poleward-propagating Rossby waves in response to tropical MJO convection interact with Northern Hemisphere background flow, leading to anomalous troughing and ridging. These anomalous circulation centers then impact daily snow depth change via precipitation processes and anomalies in surface air temperature. © 2015 American Meteorological Society. 资助项目: NSF, National Science Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50371
Appears in Collections: 气候变化事实与影响
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作者单位: Oceanography Department, U.S. Naval Academy, Annapolis, MD, United States
Recommended Citation:
Barrett B.S.,Henderson G.R.,Werling J.S.. The Influence of the MJO on the intraseasonal variability of Northern Hemisphere spring snow depth[J]. Journal of Climate,2015-01-01,28(18)