DOI: 10.1175/JCLI-D-11-00151.1
Scopus记录号: 2-s2.0-84858592278
论文题名: Estimation of rain intensity spectra over the continental United States using ground radar-gauge measurements
作者: Lin X. ; Hou A.Y.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 6 起始页码: 1901
结束页码: 1915
语种: 英语
Scopus关键词: Detection capability
; Geographical variations
; Heavy rain event
; High resolution
; Horizontal resolution
; Model outputs
; Passive microwave sensors
; Pixel size
; Precipitation radar
; Quantitative estimation
; Rain events
; Rain rates
; Rain-intensity
; Satellite measurements
; Satellite sensors
; Seasonal variation
; Space-borne
; Spatial resolution
; Temporal resolution
; Estimation
; Infiltration
; Precipitation (chemical)
; Soil moisture
; Rain
; numerical model
; precipitation assessment
; precipitation intensity
; quantitative analysis
; radar
; rainfall
; raingauge
; satellite sensor
; seasonal variation
; sensitivity analysis
; spatial resolution
; United States
英文摘要: A high-resolution surface rainfall product is used to estimate rain characteristics over the continental United States as a function of rain intensity. By defining data at 4-km horizontal resolutions and 1-h temporal resolutions as an individual precipitating or nonprecipitating sample, statistics of rain occurrence and rain volume including their geographical and seasonal variations are documented. Quantitative estimations are also conducted to evaluate the impact of missing light rain events due to satellite sensors' detection capabilities. It is found that statistics of rain characteristics have large seasonal and geographical variations across the continental United States. Although heavy rain events (>10 mm h -1) only occupy 2.6% of total rain occurrence, they may contribute to 27% of total rain volume. Light rain events (<1.0 mm h -1), occurring much more frequently (65%) than heavy rain events, can also make important contributions (15%) to the total rain volume. For minimum detectable rain rates setting at 0.5 and 0.2 mm h -1, which are close to sensitivities of the current and future spaceborne precipitation radars, there are about 43% and 11% of total rain occurrence below these thresholds, and they respectively represent 7% and 0.8% of total rain volume. For passive microwave sensors with their rain pixel sizes ranging from 14 to 16 km and the minimum detectable rain rates around 1 mm h -1, the missed light rain events may account for 70% of rain occurrence and 16% of rain volume. Statistics of rain characteristics are also examined on domains with different temporal and spatial resolutions. Current issues in estimates of rain characteristics from satellite measurements and model outputs are discussed. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52532
Appears in Collections: 气候变化事实与影响
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作者单位: Mesoscale Atmospheric Processes Branch, NASA Goddard Space Flight Center, Greenbelt, MD, United States; Goddard Earth Sciences Technology and Research, Morgan State University, Baltimore, MD, United States
Recommended Citation:
Lin X.,Hou A.Y.. Estimation of rain intensity spectra over the continental United States using ground radar-gauge measurements[J]. Journal of Climate,2012-01-01,25(6)