DOI: 10.1175/JCLI-D-14-00657.1
Scopus记录号: 2-s2.0-84945914514
论文题名: The relationship between the Pacific-North American teleconnection pattern, the great plains low-level jet, and north central U.S. heavy rainfall events
作者: Harding K.J. ; Snyder P.K.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 17 起始页码: 6729
结束页码: 6742
语种: 英语
Scopus关键词: High pressure effects
; Jets
; Moisture
; Precipitation (meteorology)
; Extreme events
; Hydrometeorology
; Medium range forecast
; Moisture transport
; North American
; Precipitation events
; Teleconnection patterns
; Teleconnections
; Rain
; extreme event
; hydrometeorology
; jet stream
; moisture transfer
; precipitation intensity
; teleconnection
; Great Plains
; Pacific Ocean
英文摘要: This study demonstrates the relationship between the Pacific-North American (PNA) teleconnection pattern and the Great Plains low-level jet (GPLLJ). The negative phase of the PNA, which is associated with lower heights over the Great Plains and ridging in the southeastern United States, enhances the GPLLJ by increasing the pressure gradient within the GPLLJ on 6-hourly to monthly time scales. Strong GPLLJ events predominantly occur when the PNA is negative. Warm-season strong GPLLJ events with a very negative PNA (<-1) are associated with more persistent, longer wavelength planetary waves that increase the duration of GPLLJ events and enhance precipitation over the north central United States. When one considers the greatest 5-day north central U.S. precipitation events, a large majority occur when the PNA is negative, with most exhibiting a very negative PNA. Stronger moisture transport during heavy rainfall events with a very negative PNA decreases the precipitation of locally derived moisture compared to events with a very positive PNA. The PNA becomes negative 2-12 days before heavy rainfall events and is very negative within two weeks of 78% of heavy rainfall events in the north central United States, a finding that could be used to improve medium-range forecasts of heavy rainfall events. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50812
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Soil, Water and Climate, University of Minnesota, St. Paul, MN, United States
Recommended Citation:
Harding K.J.,Snyder P.K.. The relationship between the Pacific-North American teleconnection pattern, the great plains low-level jet, and north central U.S. heavy rainfall events[J]. Journal of Climate,2015-01-01,28(17)