DOI: 10.1016/j.atmosres.2018.05.026
Scopus记录号: 2-s2.0-85048483033
论文题名: Optimization of high resolution COSMO model performance over Switzerland and Northern Italy
作者: Voudouri A. ; Khain P. ; Carmona I. ; Avgoustoglou E. ; Kaufmann P. ; Grazzini F. ; Bettems J.M.
刊名: Atmospheric Research
ISSN: 1698095
出版年: 2018
卷: 213 起始页码: 70
结束页码: 85
语种: 英语
Scopus关键词: Calibration
; Forecasting
; Wind
; Calibration procedure
; Computational costs
; Computational demands
; Horizontal resolution
; Model performance
; Multivariate calibration methods
; Parameter numbers
; Regional climate modeling (RCM)
; Climate models
; climate modeling
; optimization
; precipitation (climatology)
; regional climate
; weather forecasting
; wind velocity
; Italy
; Switzerland
英文摘要: In our previous work, a practicable objective three-parameter multivariate calibration method build on a quadratic meta-model was introduced leading to the optimization of COSMO model. The process had been applied initially for a regional climate model (RCM) providing a considerable alternative to the, more standard, expert tuning techniques. Based on the successful implementation of this method, the calibration of the model on the operational level is undertaken in the present work. A larger number of parameters are selected in order to optimize the model performance for a high horizontal resolution (~2 km) over the domain of Switzerland and Northern Italy as well an extensive period of one year. The influence of the variables is associated to daily forecasts such as daily minimum and maximum 2 m temperature as well as 24 h accumulated precipitation. The increased computational demands and the substantial complexities regarding the application of a meta-model for a large parameter number are successfully tackled. The forecast skill of the 2-m temperature was improved by lowering the temperature bias by 0.2 °C. Contradictory, a small decrease in forecast skill for precipitation and dew point was observed. There is practically no change in forecasted wind speed when using the optimum set of parameters as none of the parameters tested is directly affecting model's ability to forecast wind. Currently, the results indicate a relatively low benefit with respect to the computational cost of the method as it remains expensive for a regular usage of the calibration procedure. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/108783
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Hellenic National Meteorological Service, Hellinikon, 16777, Greece; Israel Meteorological Service, Bet Dagan, 5025001, Israel; Federal Office of Meteorology and Climatology, Zurich, Switzerland; ARPA-SIMC, Bologna, Italy
Recommended Citation:
Voudouri A.,Khain P.,Carmona I.,et al. Optimization of high resolution COSMO model performance over Switzerland and Northern Italy[J]. Atmospheric Research,2018-01-01,213