DOI: 10.1175/JCLI-D-17-0534.1
Scopus记录号: 2-s2.0-85049740244
论文题名: Impacts of the Madden-Julian oscillation on storm-track activity, surface air temperature, and precipitation over North America
作者: Zheng C. ; Chang E.K. ; Kim H.-M. ; Zhang M. ; Wang W.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 15 起始页码: 6113
结束页码: 6134
语种: 英语
英文关键词: Intraseasonal variability
; Madden-Julian oscillation
; Precipitation
; Rossby waves
; Storm tracks
; Temperature
Scopus关键词: Atmospheric temperature
; Climate change
; Fluxes
; Mechanical waves
; Precipitation (chemical)
; Storms
; Temperature
; Wind effects
; Intraseasonal time scale
; Intraseasonal variability
; Intraseasonal variations
; Madden-Julian oscillation
; Rossby wave
; Storm track
; Surface air temperatures
; Wave-activity flux
; Fighter aircraft
; air temperature
; jet stream
; Madden-Julian oscillation
; precipitation (climatology)
; Rossby wave
; seasonal variation
; storm track
; westerly
; North America
; Pacific Ocean
; Pacific Ocean (East)
英文摘要: In this study, the intraseasonal variations in storm-track activity, surface air temperature, and precipitation over North America associated with the Madden-Julian oscillation (MJO) in boreal winter (November-April) are investigated. A lag composite strategy that considers different MJO phases and different lag days is developed. The results highlight regions over which the MJO has significant impacts on surface weather on intraseasonal time scales. A north-south shift of storm-track activity associated with the MJO is found over North America. The shift is consistent with the MJO-related surface air temperature anomaly over the eastern United States. In many regions over the western, central, and southeastern United States, the MJO-related precipitation signal is also consistent with nearby storm-track activity. An MJO-related north-south shift of precipitation is also found near the west coast of North America, with the precipitation over California being consistent with the MJO-related storm-track activity over the eastern Pacific. MJO-related temperature and storm-track anomalies are also found near Alaska. Further analyses of streamfunction anomalies and wave activity flux show clear signatures of Rossby wave trains excited by convection anomalies related to MJO phases 3 and 8. These wave trains propagate across the Pacific and North America, bringing an anticyclonic (cyclonic) anomaly to the eastern part of North America, shifting the westerly jet to the north (south), thereby modulating the surface air temperature and storm-track activity over the continent. Rossby waves associated with phases 2 and 6 are also found to impact the U.S. West Coast. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111450
Appears in Collections: 气候减缓与适应
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作者单位: School of Marine and Atmospheric Sciences, Stony Brook University, State University of New York, Stony Brook, NY, United States; NOAA/Climate Prediction Center, College Park, MD, United States
Recommended Citation:
Zheng C.,Chang E.K.,Kim H.-M.,et al. Impacts of the Madden-Julian oscillation on storm-track activity, surface air temperature, and precipitation over North America[J]. Journal of Climate,2018-01-01,31(15)