DOI: 10.1007/s00382-014-2242-1
Scopus记录号: 2-s2.0-84927621294
论文题名: Benefit of convection permitting climate model simulations in the representation of convective precipitation
作者: Fosser G. ; Khodayar S. ; Berg P.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 44, 期: 2017-01-02 起始页码: 45
结束页码: 60
语种: 英语
英文关键词: Atmospheric processes
; Convection
; Convection permitting scale
; COSMO-CLM
; Diurnal cycle and precipitation
; Regional climate model
英文摘要: A major source of uncertainty in regional climate model (RCM) simulations arises from the parameterisation of sub-grid scale convection. With increasing model resolution, approaching the so-called convection permitting scale, it is possible to switch off most of the convection parameterisations. A set of simulations using COSMO-CLM model has been carried out at different resolutions in order to investigate possible improvements and limitations resulting from increased horizontal resolution. For our analysis, 30 years were simulated in a triple nesting setup with 50, 7 and 2.8 km resolutions, with ERA40 reanalysis data at the lateral boundaries of the coarsest nest. The investigation area covers the state of Baden-Württemberg in southwestern Germany, which is a region known for abundant orographically induced convective precipitation. A very dense network of high temporal resolution rain gauges is used for evaluation of the model simulations. The purpose of this study is to examine the differences between the 7 and 2.8 km resolutions in the representation of precipitation at sub-daily timescales, and the atmospheric conditions leading to convection. Our results show that the highest resolution of RCM simulations significantly improves the representation of both hourly intensity distribution and diurnal cycle of precipitation. In addition, at convection permitting scale the atmospheric fields related to convective precipitation show a better agreement with each other. The results imply that higher spatial resolution partially improves the representation of the precipitation field, which must be the way forward for regional climate modelling. © 2014, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54530
Appears in Collections: 过去全球变化的重建
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作者单位: Institute for Meteorology and Climate Research, Karlsruhe Institute of Technology, Wolfgang-Gaede-Strasse 1, Karlsruhe, Germany; Institute of Water and River Basin Management, Section Hydrology, Karlsruhe Institute of Technology, Kaiserstraße 12, Karlsruhe, Germany; Météo France and CNRS, CNRM-GAME, 42 Avenue Gaspard Coriolis, Toulouse, France; Swedish Meteorological and Hydrological Institute, Folkborgsvägen 17, Norrköping, Sweden
Recommended Citation:
Fosser G.,Khodayar S.,Berg P.. Benefit of convection permitting climate model simulations in the representation of convective precipitation[J]. Climate Dynamics,2014-01-01,44(2017-01-02)