摘要
基于3种不同的陆面过程方案(SLAB、NOAH和RUC方案)利用WRF模式对2009年7月发生在江苏沿江及苏南地区包括沪宁高速公路在内的一次高温天气过程进行了对比模拟和分析。结果表明:①WRF模式中耦合陆面参数化方案后的试验结果更接近实况,且模拟的高温天气过程对不同陆面方案的选择较为敏感;②SLAB、NOAH、RUC 3种陆面方案均较为真实地模拟出了梅村站气温变化趋势,但耦合NOAH陆面方案对气温的预报准确率最高;③不同陆面方案的模拟结果共同反映出,沪宁高速公路沿线感热通量大而潜热通量小这一特征,NOAH方案对感热和潜热通量的模拟效果更理想;④垂直运动对陆面方案的敏感性较强,基于NOAH方案模拟的垂直运动效果最好;⑤SLAB、NOAH和RUC陆面方案模拟的相对湿度存在差异,SLAB方案较其他2个方案的模拟效果更好些;⑥3种陆面方案模拟的地面水平风速都较小,这有利于地面高温出现。地面风速模拟对陆面方案的选择较为敏感,NOAH方案对其模拟效果最佳。
The high temperature weather process occurred in the region along the Shanghai-Nanjing Expressway in July of 2009 is simulated by the WRF model with three different land surface parameterization schemes（SLAB,NOAH,and RUC）.The results show that：（1） The simulation results integrated the land surface parameterization schemes in the WRF model is closer to the reality,and the sensitivity of high temperature weather simulation to land surface physical processes is significant.（2） The simulated temperature values of Meicun Station based on the three different land surface schemes are close to the observed values,and when the NOAH scheme is coupled into the WRF model,the prediction accuracy of air temperature simulation is the highest.（3） The simulations coupling the three different land surface schemes show that the sensible heat flux is high and the latent heat flux is low along the Shanghai-Nanjing expressway.The integrated simulation coupling the NOAH scheme is more satisfactory.（4） The vertical movement simulated by the WRF model is sensitive to the selection of different land surface schemes and the NOAH scheme gives more reasonable results than the others.（5） In the simulations on the relative humidity,there are some differences between the three schemes,and the SLAB scheme performs better than NOAH or RUC.（6） All the horizontal wind speeds at the ground simulated by the three land surface schemes are small,which is conducive to the emergence of high temperature at the surface.The simulation of wind speeds by WRF model is sensitive to the selection of different land surface processes.Results simulated by the NOAH scheme are better in effectiveness than that by the others.
出处
《气象科技》
北大核心
2011年第5期537-544,共8页
Meteorological Science and Technology
基金
国家公益性行业(气象)科研专项(GYHY200906037-27)资助
关键词
高温
高速公路
陆面过程
感热通量
潜热通量
high temperature weather
Shanghai-Nanjing expressway
land surface parameterization scheme
sensible heat flux
latent heat flux
