本文主要研究了清华大学MEIC 2012基准年0.25°×0.25°排放清单应用于WRF-CHEM模式所需的主要处理技术,包括:单位面积污染物排放质量(或物质的量)浓度的计算,经纬度格点浓度到中尺度格点浓度的转换,使用模式地表类型数据对排放清单进行细化处理,各部门小时排放数据的确定以及PM2.5组成成分比例的区域分配等.通过重污染个例的预报和模拟试验分析了清单处理技术的应用效果,结果表明:模式能较好地反映出污染物局地累积和水平输送的变化趋势,但高污染中心的浓度预报值要低于实际观测值,这与气象场的预报偏差有较大关系.清单细化处理技术可以改变模式格点上污染物的模拟浓度,但在不同气象条件下,改变量有所不同,静稳天气下,城市及其周边地区的改变量较大.%The required techniques are investigated for applying the Tsinghua MEIC emission inventory of 2012 reference year with 0.25°×0.25° resolution to the WRF-CHEM model.These techniques include the calculation of pollutant mass per unit area,the transformation of pollutant concentration from the lat-lon grid to the mesoseale grid,the refinement of emission inventory with model land-use data,the determination of hourly emission data in each sector,and the apportionment of major PM2.5 species in the specified regions.The effectiveness and performance of the aforementioned inventory processing techniques are assessed in the heavy pollution scenarios.It is indicated that the local accumulation and horizontal transport of pollutants can be well simulated from the WRF-CHEM model.However,the concentration in the high pollution central area is underestimated,which is closely related to the forecast bias in the meteorological fields.Additionally,the refinement of emission inventory changes the simulated pollutant concentration.The amount of change is found to vary according to the weather conditions.Under stable meteorological conditions,large changes mainly occur within and around urban areas.
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