DOI: 10.1175/JCLI-D-15-0340.1
Scopus记录号: 2-s2.0-84946219375
论文题名: Daily precipitation and tropical moisture exports across the eastern United States: An application of archetypal analysis to identify spatiotemporal structure
作者: Steinschneider S. ; Lall U.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 21 起始页码: 8585
结束页码: 8602
语种: 英语
Scopus关键词: Atmospheric temperature
; Moisture
; Orthogonal functions
; Precipitation (meteorology)
; Submarine geophysics
; Surface properties
; Surface waters
; Tropics
; Atlantic multidecadal oscillations
; Empirical orthogonal function analysis
; Generalized linear model
; Pacific decadal oscillation
; Precipitation variability
; Sea surface temperature (SST)
; Spatio-temporal structures
; Spatiotemporal variability
; Oceanography
; Atlantic Multidecadal Oscillation
; atmospheric moisture
; Pacific Decadal Oscillation
; precipitation (climatology)
; sea surface temperature
; spatiotemporal analysis
; teleconnection
; United States
英文摘要: This study examines the spatiotemporal variability of two sets of daily precipitation from ERA-Interim across the eastern United States between 1979 and 2013: 1) total precipitation and 2) precipitation originating from tropical moisture exports (TMEs), which have been linked to extremes of midlatitude precipitation. Archetypal analysis (AA) is introduced as a new method to decompose and characterize structures within the spatiotemporal climate data. AA is uniquely suited to identify extremal patterns and is a complementary method to empirical orthogonal function (EOF) analysis. The authors provide a brief comparison between AAand EOF analysis and then examine the spatiotemporal variability, circulation anomalies, and sea surface temperature teleconnections associated with the archetypes of the two precipitation variables. Markovian structure, seasonal variability, and interannual trends in archetype occurrence are explored using nonparametric generalized linear models (GLMs). Results show that the modes of precipitation variability and their associated teleconnections are very similar between total and TME precipitation, suggesting that TMEs can help explain prevailing modes of total precipitation variability. Both total and TME precipitation shift longitudinally conditional on the phase of the Pacific decadal oscillation (PDO) and sea surface temperatures in the North Atlantic, and they are inhibited during strong, negative PDO and positive Atlantic multidecadal oscillation (AMO) regimes. The GLM analysis reveals distinct seasonal cycles and decadal trends in archetypes likely associated with the strength and position of the NorthAtlantic subtropical high (NASH). The study concludes with a discussion of the limitations of the analysis and other promising applications of AA. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50852
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Earth and Environmental Engineering, Columbia University, New York, NY, United States
Recommended Citation:
Steinschneider S.,Lall U.. Daily precipitation and tropical moisture exports across the eastern United States: An application of archetypal analysis to identify spatiotemporal structure[J]. Journal of Climate,2015-01-01,28(21)