DOI: 10.1175/JCLI-D-12-00264.1
Scopus记录号: 2-s2.0-84874798159
论文题名: Seasonal variation and spatial patterns of the atmospheric component of the pacific decadal oscillation
作者: Mills C.M. ; Walsh J.E.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 5 起始页码: 1575
结束页码: 1594
语种: 英语
Scopus关键词: Atmospheric components
; Climate oscillation
; Climate variability
; Decadal variability
; Geo-potential heights
; Grid points
; North American
; North Pacific
; Pacific decadal oscillation
; Sea level pressure
; Sea surface temperature (SST)
; Seasonal variation
; Seasonality
; Spatial patterns
; Surface air temperatures
; Temperature signal
; Vertical structures
; Atmospheric pressure
; Atmospheric temperature
; Climatology
; Lasers
; Nickel compounds
; Sea level
; Atmospheric structure
; air temperature
; El Nino-Southern Oscillation
; geopotential
; Pacific Decadal Oscillation
; precipitation (climatology)
; sea level pressure
; sea surface temperature
; seasonal variation
; spatial analysis
; North America
; United States
英文摘要: The Pacific decadal oscillation (PDO) is an El Niño-Southern Oscillation (ENSO)-like climate oscillation that varies on multidecadal and higher-frequency scales, with a sea surface temperature (SST) dipole in the Pacific. This study addresses the seasonality, vertical structure, and across-variable relationships of the local North Pacific and downstream North American atmospheric signal of the PDO. The PDO-based composite difference fields of 500-mb geopotential height, surface air temperature, sea level pressure, and precipitation vary not only across seasons, but also from one calendar month to another within a season, although monthto- month continuity is apparent. The most significant signals occur in western North America and in the southeastern United States, where a positive PDO is associated with negative heights, consistent with underlying temperatures in the winter. In summer, a negative precipitation signal in the southeastern United States associated with a positive PDO phase is consistent with a ridge over the region. When an annual harmonic is fit to the 12 monthly surface air temperature differences at each grid point, the PDO temperature signal peaks in winter in most of North America, while a peak in summer occurs in the southeastern United States. Approximately 25% of the variance of the PDO index is accounted for by ENSO. Atmospheric composite differences based on a residual (ENSO linearly removed) PDO index have many similarities to those of the full PDO signal. © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51991
Appears in Collections: 气候变化事实与影响
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作者单位: University of Illinois at Urbana-Champaign, Urbana, IL, United States
Recommended Citation:
Mills C.M.,Walsh J.E.. Seasonal variation and spatial patterns of the atmospheric component of the pacific decadal oscillation[J]. Journal of Climate,2013-01-01,26(5)