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Assessing WRF model parameter sensitivity: A case study with 5 day summer precipitation forecasting in the Greater Beijing Area
Author(s) -
Di Zhenhua,
Duan Qingyun,
Gong Wei,
Wang Chen,
Gan Yanjun,
Quan Jiping,
Li Jianduo,
Miao Chiyuan,
Ye Aizhong,
Tong Charles
Publication year - 2015
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1002/2014gl061623
Subject(s) - weather research and forecasting model , beijing , precipitation , environmental science , sensitivity (control systems) , climatology , meteorology , storm , quantitative precipitation forecast , atmospheric sciences , china , geography , geology , engineering , archaeology , electronic engineering
A global sensitivity analysis method was used to identify the parameters of the Weather Research and Forecasting (WRF) model that exert the most influence on precipitation forecasting. Twenty‐three adjustable parameters were selected from seven physical components of the WRF model. The sensitivity was evaluated based on skill scores calculated over nine 5 day precipitation forecasts during the summer seasons from 2008 to 2010 in the Greater Beijing Area in China. We found that eight parameters are more sensitive than others. Storm type seems to have no impact on the list of sensitive parameters but does influence the degree of sensitivity. We also examined the physical interpretation of parameter sensitivity. This analysis is useful for further optimization of the WRF model parameters to improve precipitation forecasting.