DOI: 10.1175/JCLI-D-11-00562.1
Scopus记录号: 2-s2.0-84864311379
论文题名: Realism of rainfall in a very high-resolution regional climate model
作者: Kendon E.J. ; Roberts N.M. ; Senior C.A. ; Roberts M.J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 17 起始页码: 5791
结束页码: 5806
语种: 英语
Scopus关键词: Climate prediction
; Climate variability
; Convective-scale processes
; Diurnal cycle
; Extreme events
; Heavy rain event
; Heavy rainfall
; Heavy rains
; High resolution
; Key indicator
; Local scale
; Model skill
; Regional climate models
; Spatial extent
; Temporal structures
; United kingdom
; Climate models
; Climatology
; Precipitation (chemical)
; Rain
; climate modeling
; climate prediction
; climate variation
; convective system
; extreme event
; precipitation (climatology)
; rainfall
; regional climate
; United Kingdom
英文摘要: The realistic representation of rainfall on the local scale in climate models remains a key challenge. Realism encompasses the full spatial and temporal structure of rainfall, and is a key indicator of model skill in representing the underlying processes. In particular, if rainfall is more realistic in a climate model, there is greater confidence in its projections of future change. In this study, the realism of rainfall in a very high-resolution (1.5 km) regional climate model (RCM) is compared to a coarser-resolution 12-km RCM. This is the first time a convection-permitting model has been run for an extended period (1989-2008) over a region of the United Kingdom, allowing the characteristics of rainfall to be evaluated in a climatological sense. In particular, the duration and spatial extent of hourly rainfall across the southern United Kingdom is examined, with a key focus on heavy rainfall. Rainfall in the 1.5-kmRCMis found to be much more realistic than in the 12-km RCM. In the 12-km RCM, heavy rain events are not heavy enough, and tend to be too persistent and widespread. While the 1.5-km model does have a tendency for heavy rain to be too intense, it still gives a much better representation of its duration and spatial extent. Long-standing problems in climate models, such as the tendency for too much persistent light rain and errors in the diurnal cycle, are also considerably reduced in the 1.5-km RCM. Biases in the 12-km RCM appear to be linked to deficiencies in the representation of convection. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52255
Appears in Collections: 气候变化事实与影响
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作者单位: Met Office Hadley Centre, Exeter, United Kingdom; Joint Centre for Mesoscale Meteorology, Met Office, Reading, United Kingdom
Recommended Citation:
Kendon E.J.,Roberts N.M.,Senior C.A.,et al. Realism of rainfall in a very high-resolution regional climate model[J]. Journal of Climate,2012-01-01,25(17)