DOI: 10.1175/JCLI-D-13-00618.1
Scopus记录号: 2-s2.0-84919608238
论文题名: Attribution and characteristics of wet and dry seasons in the upper Colorado River basin
作者: Bolinger R.A. ; Kummerow C.D. ; Doesken N.J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 23 起始页码: 8661
结束页码: 8673
语种: 英语
Scopus关键词: Atmospheric pressure
; Precipitation (meteorology)
; Watersheds
; Climate variability
; Colorado River Basin
; Pacific decadal oscillation
; Precipitation variability
; Seasonal variability
; Southern oscillation
; Total precipitable water
; Wet and dry seasons
; Climatology
; climate variation
; dry season
; El Nino-Southern Oscillation
; Pacific Decadal Oscillation
; precipitation (climatology)
; seasonal variation
; temperature anomaly
; wet season
; wind velocity
; Colorado Basin [North America]
英文摘要: Previous research has shown that the temperature and precipitation variability in the Upper Colorado River basin (UCRB) is correlated with large-scale climate variability [i.e., El Niño-Southern Oscillation (ENSO) and Pacific decadal oscillation (PDO)]. But this correlation is not very strong, suggesting the need to look beyond the statistics. Looking at monthly contributions across the basin, results show that February is least sensitive to variability, and a wet October could be a good predictor for a wet season. A case study of a wet and a dry year (with similar ENSO/PDO conditions) shows that the occurrence of a few large accumulating events is what drives the seasonal variability, and these large events can happen under a variety of synoptic conditions. Looking at several physical factors that can impact the amount of accumulation in any given event, it is found that large accumulating events (>10mm in one day) are associated with westerly winds at all levels, higher wind speeds at all levels, and greater amounts of total precipitable water. The most important difference between a large accumulating and small accumulating event is the presence of a strong (>4ms-1) low-level westerly wind. Because much more emphasis should be given to this more local feature, as opposed to large-scale variability, an accurate seasonal forecast for the basin is not producible at this time. © 2014 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51024
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States; NOAA/Great Lakes Environmental Research Laboratory, Ann Arbor, MI, United States
Recommended Citation:
Bolinger R.A.,Kummerow C.D.,Doesken N.J.. Attribution and characteristics of wet and dry seasons in the upper Colorado River basin[J]. Journal of Climate,2014-01-01,27(23)