风是近地层大气的主要物理量,也是影响林火蔓延的重要因素。本文以2020年“3·30”西昌森林火灾周围的近地面风场为研究对象,基于中尺度数值模式(Weather Research and Forecasting,WRF),采用6种边界层方案进行敏感性实验。结果表明...风是近地层大气的主要物理量,也是影响林火蔓延的重要因素。本文以2020年“3·30”西昌森林火灾周围的近地面风场为研究对象,基于中尺度数值模式(Weather Research and Forecasting,WRF),采用6种边界层方案进行敏感性实验。结果表明,YSU和Shin-Hong方案对凉山10 m风速模拟误差最小,YSU和MYNN3方案对凉山10 m风向模拟误差最小;YSU和Shin-Hong方案能模拟出西昌火灾区风场分布以及风向转变;在西昌站点YSU方案模拟的边界层结构最接近观测值,能较好地表现边界层内动力和热力结构。展开更多
WRF(weather research and forecasting)模式中参数化方案的选择与近地面风场的仿真模拟结果关系密切。为解决新疆北部不同地形地区风场模拟准确性的问题,采用WRF中尺度气象模式,探究4类参数化方案(边界层、微物理、陆面过程、近地面层...WRF(weather research and forecasting)模式中参数化方案的选择与近地面风场的仿真模拟结果关系密切。为解决新疆北部不同地形地区风场模拟准确性的问题,采用WRF中尺度气象模式,探究4类参数化方案(边界层、微物理、陆面过程、近地面层)以及次网格地形方案对新疆北部不同地形地区风场模拟结果的影响。结果表明:每组试验均能模拟出风速的变化趋势;陆面过程RUC(rapid update cycle)方案和微物理Lin(Purdue Lin)方案对平原地区模拟结果较好,陆面过程Noah方案和微物理WSM6(WRF single moment 6 class)方案对山区地形模拟结果较好,且对于平原和山谷地形,次网格地形方案对模拟地区均能起到较好的修正作用。展开更多
In the paper,we have developed a 2-D physical-dynamical coupled climate model.Some sensitive experiments have been done by use of this model.First of all,we have studied the effects of different results by two radiati...In the paper,we have developed a 2-D physical-dynamical coupled climate model.Some sensitive experiments have been done by use of this model.First of all,we have studied the effects of different results by two radiational calcu- lation schemes on circulation variation.The calculated results have shown that the different radiation parameterization schemes give different results,therefore the variational effects of wind,temperature,and humidity field are presented on the medium-range circulation variation. Besides,we have also studied the role of the meridional eddy momentum fluxes in formation of the monsoon over East Asia.The results of study have shown that on the average,the roles of meridional eddy flux of momentum formative processes of monsoon which is added to momentum equations by using the scheme of moist process parameterization with plateau are manifest.展开更多
文摘风是近地层大气的主要物理量,也是影响林火蔓延的重要因素。本文以2020年“3·30”西昌森林火灾周围的近地面风场为研究对象,基于中尺度数值模式(Weather Research and Forecasting,WRF),采用6种边界层方案进行敏感性实验。结果表明,YSU和Shin-Hong方案对凉山10 m风速模拟误差最小,YSU和MYNN3方案对凉山10 m风向模拟误差最小;YSU和Shin-Hong方案能模拟出西昌火灾区风场分布以及风向转变;在西昌站点YSU方案模拟的边界层结构最接近观测值,能较好地表现边界层内动力和热力结构。
文摘WRF(weather research and forecasting)模式中参数化方案的选择与近地面风场的仿真模拟结果关系密切。为解决新疆北部不同地形地区风场模拟准确性的问题,采用WRF中尺度气象模式,探究4类参数化方案(边界层、微物理、陆面过程、近地面层)以及次网格地形方案对新疆北部不同地形地区风场模拟结果的影响。结果表明:每组试验均能模拟出风速的变化趋势;陆面过程RUC(rapid update cycle)方案和微物理Lin(Purdue Lin)方案对平原地区模拟结果较好,陆面过程Noah方案和微物理WSM6(WRF single moment 6 class)方案对山区地形模拟结果较好,且对于平原和山谷地形,次网格地形方案对模拟地区均能起到较好的修正作用。
文摘In the paper,we have developed a 2-D physical-dynamical coupled climate model.Some sensitive experiments have been done by use of this model.First of all,we have studied the effects of different results by two radiational calcu- lation schemes on circulation variation.The calculated results have shown that the different radiation parameterization schemes give different results,therefore the variational effects of wind,temperature,and humidity field are presented on the medium-range circulation variation. Besides,we have also studied the role of the meridional eddy momentum fluxes in formation of the monsoon over East Asia.The results of study have shown that on the average,the roles of meridional eddy flux of momentum formative processes of monsoon which is added to momentum equations by using the scheme of moist process parameterization with plateau are manifest.
