DOI: 10.1175/JCLI-D-14-00518.1
Scopus记录号: 2-s2.0-84942936624
论文题名: Impact of the Hawaiian high on interannual variations of winter precipitation over California
作者: Leonardo N. ; Hameed S.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 14 起始页码: 5667
结束页码: 5682
语种: 英语
Scopus关键词: Atmospheric pressure
; Climatology
; Drought
; Linear regression
; Rain
; Regression analysis
; Sea level
; Anticyclones
; ENSO
; Independent variables
; Interannual fluctuations
; Interannual variability
; Interannual variation
; Linear regression models
; Western United States
; Climate change
; annual variation
; anticyclone
; climate change
; drought
; El Nino-Southern Oscillation
; precipitation (climatology)
; rainfall
; sea level pressure
; winter
; California
; Hawaii [United States]
; Pacific Coast [North America]
; Pacific Coast [United States]
; United States
英文摘要: Past investigations have shown that interannual variability in winter precipitation over the western United States is related to large-scale sea level pressure fluctuations. California is adjacent to the North Pacific subtropical high, also known as the Hawaiian high. This study analyzes the relationship between interannual variations of winter precipitation in California and fluctuations in the Hawaiian high's pressure and location. Defining objective indices to characterize the high, it is shown that precipitation in California is significantly anticorrelated with the high's intensity. Precipitation is also shown to decrease as the high shifts southward or eastward.A linear regression model ofDecember-March precipitation averaged over all of California with the pressure and longitude of the high as independent variables explains 43% of the precipitation variance during 1949-2012. Variation of the Hawaiian high's pressure is the major factor impacting winter precipitation in both Northern and Southern California. Smaller contributions are made by variations of the longitudinal position of the Hawaiian high to Northern California and by ENSO to Southern California. By comparison, the Pacific-North American (PNA) pattern does not significantly impact winter precipitation over California. The interannual fluctuations of theHawaiian high's pressure in winter are related to diabatic heating over the tropical Pacific and theAleutian region, and are not related to diabatic heating over theWestCoast of theUnited States. The Hawaiian high's pressure and its latitude and longitude positions do not show decadal trends, and their interannual variations are not correlated with air temperatures averaged over the Northern Hemisphere. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50871
Appears in Collections: 气候变化事实与影响
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作者单位: School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY, United States
Recommended Citation:
Leonardo N.,Hameed S.. Impact of the Hawaiian high on interannual variations of winter precipitation over California[J]. Journal of Climate,2015-01-01,28(14)