DOI: 10.1002/jgrd.50159
论文题名: Impacts of boundary conditions on the precipitation simulation of RegCM4 in the CORDEX East Asia domain
作者: Park J.-H. ; Oh S.-G. ; Suh M.-S.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 4 起始页码: 1652
结束页码: 1667
语种: 英语
英文关键词: boundary condition
; CORDEX
; precipitation
; RegCM4
; simulation skills 1637,3305,3354,3355
Scopus关键词: Boundary conditions
; Moisture
; Precipitation (chemical)
; Troposphere
; CORDEX
; Geographical locations
; Heavy precipitation
; Precipitation characteristics
; RegCM4
; Regional climate models
; Seasonal variation
; simulation skills 1637,3305,3354,3355
; Computer simulation
; atmospheric modeling
; boundary condition
; climate modeling
; diurnal variation
; geographical region
; numerical model
; precipitation (climatology)
; precipitation assessment
; spatial distribution
; troposphere
; South Korea
英文摘要: The impact of boundary conditions (BCs) on simulations of precipitation characteristics using the Regional Climate Model version 4 (RegCM4) driven by two BCs (ERA-Interim: ERA, NCEP/DOE 2: R2) was investigated using 18 years (1989-2006) of simulations from the Coordinated Regional Climate Downscaling Experiment (CORDEX) East Asia region. The RegCM4 adequately simulated spatial distribution of precipitation over the East Asia region and its temporal variations, irrespective of the BC used. It overestimated precipitation over the central region of the model domain except for India and South Korea and underestimated precipitation over equatorial ocean regions. The RegCM4's simulation skills were better in winter than in summer regardless of the BC, which can be related to the low spatial resolution (50 km) of the model, but detailed simulations of precipitation are significantly impacted by the BCs, although the impact varies with geographical location and season. Driven by ERA, the RegCM4 reproduces more precipitation in the central inland region of the model's domain and less precipitation in the southern coastal areas than when driven by R2. The differences occur because RegCM4 driven by ERA simulated the lower troposphere as being warmer and more humid and the upper troposphere as being cooler than that by R2. The transport of moisture into the central region of the model domain is also enhanced when the RegCM4 is driven by ERA. Although the RegCM4 accurately simulated the seasonal variations in precipitation, it failed to capture diurnal variations over South Korea, particularly when driven by R2, and overestimated and underestimated light precipitation (<25 mm/day) and heavy precipitation (> 50 mm/day), respectively. Key Points Impact of BCs on simulations of precipitation of RegCM4 were investigatedSimulation skill for precipitation of RegCM4 was systematically impacted by BCsThe impacts are caused by the differences of moisture and wind profiles in BCs © 2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63912
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Department of Atmospheric Science, Kongju National University, Gongju, South Korea
Recommended Citation:
Park J.-H.,Oh S.-G.,Suh M.-S.. Impacts of boundary conditions on the precipitation simulation of RegCM4 in the CORDEX East Asia domain[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(4)