长三角气象及空气质量场对地表资料的敏感性分析  

Sensitivity analysis of meteorological conditions and air pollution concentration on land-use data in the YRD region

作　　者：张艳[1] 战雯静[1] 马蔚纯[1] 余琦[1] 陈立民[1] 

机构地区：[1]复旦大学环境科学与工程系,上海200433

出　　处：《南京大学学报（自然科学版）》2015年第3期562-574,共13页Journal of Nanjing University（Natural Science）

基　　金：国家自然科学基金(71173049);上海市自然科学基金(14ZR1402800);公益性(气象)行业专项(GYHY201206011)

摘　　要：本文通过把精细化土地利用下垫面资料引入WRF（Weather Research and Forecasting Model）气象模式和空气质量模式CMAQ（Community Multiscale Air Quality）,系统地讨论了土地利用下垫面对数值模拟结果的影响.对于气象要素,土地利用优化后的模拟地面气温、风速均更接近实测结果,替换前后造成风速的变化在-2～1.5m·s^-1之间,对气温的影响在-4～4℃之间;对于污染物浓度,土地利用下垫面优化后,极端高值出现的频率和程度有所下降,更接近实测结果,土地利用下垫面对于NOx、NO3^-、SO4^2-和SO2的四个典型月月均浓度差异分别约在-1000～1000,-20～20,-10～10,-500～500nmol·m^-3.土地利用对数值模拟结果的影响与土地利用类型本身的特性、污染物特性、空间分布、盛行风向、季节变化、时刻等因素相关,其优化对于大气数值模式的意义不可忽视.The meteorological conditions and pollutants concentrations have been simulated by the mesoscale meteorological model WRF and chemical transport model CMAQ.Through the modification of land-use data in meterological model,the modeled results have been imporved for meterological parameters,of which surface temperature and wind speed are the two with the most improvements.The modeling difference of wind speed from original land-use data and modified data ranges from-2～1.5m·s^-1,and the difference of surface temperature ranges from-4～4 ℃.The improved description of meterological conditions also results in better description of pollutants concentrations.The modeling difference of NOx,NO3^-、SO4^2-and SO2 concentrations ranges from^-1000～1000,-20～20,-10～10,-500～500nmol·m^-3.It seems that the land-use data updating is meaningful though its comprehensive impacts on numerical simulation results will vary with multiple factors such as spatial distribution of land-use types,air pollutants species,dominant wind direction and time periods.

关 键 词：土地利用 气象变量 污染物浓度 数值模拟 

分 类 号：X51[环境科学与工程—环境工程]