DOI: 10.1175/JCLI-D-12-00257.1
Scopus记录号: 2-s2.0-84880267635
论文题名: Western U.S. extreme precipitation events and their relation to ENSO and PDO in CCSM4
作者: DeFlorio M.J. ; Pierce D.W. ; Cayan D.R. ; Miller A.J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 12 起始页码: 4231
结束页码: 4243
语种: 英语
Scopus关键词: Climate variability
; Community climate system model
; ENSO
; Extreme precipitation events
; Large-scale circulation patterns
; Pacific decadal oscillation
; Pacific ocean
; Precipitation intensity
; Atmospheric pressure
; Climate models
; Greenhouse gases
; Precipitation (chemical)
; Precipitation (meteorology)
; Water resources
; Climatology
; climate modeling
; climate variation
; drizzle
; El Nino-Southern Oscillation
; extreme event
; greenhouse gas
; Pacific Decadal Oscillation
; precipitation (climatology)
; precipitation assessment
; precipitation intensity
; teleconnection
; California
; Cascade Range
; Sierra Nevada [California]
; United States
英文摘要: Water resources and management over the western United States are heavily impacted by both local climate variability and the teleconnected responses of precipitation to the El Niño-Southern Oscillation (ENSO) and Pacific decadal oscillation (PDO). In this work, regional precipitation patterns over the western United States and linkages to ENSO and the PDO are analyzed using output from a Community Climate System Model version 4 (CCSM4) preindustrial control run and observations, with emphasis on extreme precipitation events. CCSM4 produces realistic zonal gradients in precipitation intensity and duration over the western United States, with higher values on the windward side of the Cascade Mountains and Sierra Nevada and lower values on the leeward. Compared to its predecessor CCSM3, CCSM4 shows an improved teleconnected signal of both ENSO and the PDO to large-scale circulation patterns over the Pacific-North America region and also to the spatial pattern and other aspects of westernU.S. precipitation. The so-called drizzle problempersists inCCSM4 but is significantly improved compared to CCSM3. In particular, it is found that CCSM4 has substantially less precipitation duration bias than is present in CCSM3. Both the overall and extreme intensity of wintertime precipitation over the western United States show statistically significant linkages with ENSO and PDO in CCSM4. This analysis provides a basis for future studies using greenhouse gas (GHG)-forced CCSM4 runs. © 2013 American Meteorological Society. 资助项目: NSF, National Science Foundation
; NSF, National Science Foundation
; DOE, U.S. Department of Energy
; NOAA, National Oceanic and Atmospheric Administration
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51860
Appears in Collections: 气候变化事实与影响
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作者单位: Division of Climate, Atmospheric Sciences, and Physical Oceanography, Scripps Institution of Oceanography, La Jolla, CA, United States; U.S. Geological Survey, La Jolla, CA, United States
Recommended Citation:
DeFlorio M.J.,Pierce D.W.,Cayan D.R.,et al. Western U.S. extreme precipitation events and their relation to ENSO and PDO in CCSM4[J]. Journal of Climate,2013-01-01,26(12)