DOI: 10.1002/joc.5746
论文题名: Northeast United States growing season moisture conditions: Associations with a North American mid-tropospheric wave train
作者: Suriano Z.J. ; Benjamin A.E. ; Leathers D.J. ; Schroeter D. ; Corradina V.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2018
卷: 38, 期: 15 起始页码: 5542
结束页码: 5550
语种: 英语
英文关键词: Arctic oscillation
; atmospheric wave train
; drought
; North Atlantic oscillation
; PDSI
Scopus关键词: Atmospheric pressure
; Drought
; Troposphere
; Arctic Oscillation
; Atmospheric circulation
; Atmospheric waves
; Moisture conditions
; Moisture variability
; North Atlantic oscillations
; Palmer drought severity indices
; PDSI
; Moisture
; Arctic Oscillation
; atmospheric circulation
; atmospheric moisture
; atmospheric wave
; drought
; North Atlantic Oscillation
; regional climate
; troposphere
; Atlantic Ocean
; California
; Canada
; Newfoundland
; Newfoundland and Labrador
; Ohio Valley [California]
; United States
英文摘要: The Palmer Drought Severity Index is examined in the Northeast United States during the May–September growing seasons of 1950–2016, seeking to better understand the role of atmospheric circulation in moisture variability. Moist conditions for the Northeast are associated with the development of a mid-tropospheric wave train over the United States, with enhanced ridging over the west, a trough over the Ohio Valley, and ridging over the Atlantic Ocean east of Newfoundland that favours enhanced uplift, precipitation, and southeasterly flow at the surface in the Northeast. A scalar representation of the wave train, a Summer Atmospheric Drought Index (SADI), is developed and robustly validated as a strong indicator of the Northeast moisture conditions. The SADI mid-tropospheric wave train is the second largest mode of 500 hPa height variability over the North American sector from 1950–2016, and has an increasing trend such that the ridge-trough-ridge pattern is more prevalent and/or has become more enhanced with time. The wave train pattern has a significant and positive relationship to the phases of the Arctic Oscillation (AO) and North Atlantic Oscillation (NAO). This indicates that when the AO and NAO indices are positive, the wave train pattern favours the ridge-trough-ridge configuration over North America, and can lead to moist conditions in the Northeast. The opposite pathway is also valid and can lead to dry conditions in the Northeast. This pathway provides a physical link between Northeast moisture conditions and global-scale variability, improving the understanding of atmospheric influences on regional drought and excessive moisture conditions. © 2018 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116713
Appears in Collections: 气候减缓与适应
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作者单位: Department of Geography & Geology, University of Nebraska Omaha, Omaha, NE, United States; Department of Geography, University of Delaware, Newark, DE, United States
Recommended Citation:
Suriano Z.J.,Benjamin A.E.,Leathers D.J.,et al. Northeast United States growing season moisture conditions: Associations with a North American mid-tropospheric wave train[J]. International Journal of Climatology,2018-01-01,38(15)