气溶胶直接气候效应对天津气象和空气质量的影响  

The influence of the air quality and meteorological field about Aerosol direct climate effect on Tianjin

作　　者：蔡子颖[1,2] 姚青[1,2] 韩素芹[2] 刘敬乐[2] 

机构地区：[1]天津市环境气象中心,天津300074 [2]天津市气象科学研究所,天津300074

出　　处：《中国环境科学》2017年第3期908-914,共7页China Environmental Science

基　　金：中国气象局预报员专项(CMAYBY2016-005);环保公益行业专项(201409001);国家科技支撑计划(2014BAC23B01)

摘　　要：基于在线大气化学模式WRF/chem,发挥其在线模式的优势,假设是否考虑气溶胶直接气候效应2种情况,模拟2015年全年天津地区气象场和空气质量的演变,并与观测实况比较,定量剖析天气-气溶胶-天气-空气质量之间的相互关系.结果表明:2015年气溶胶直接气候效应导致天津地面太阳辐射下降27.42W/m^2,气温下降0.21℃,风速减少1.1%,相对湿度增加1.4%,边界层高度下降6.3%,气象条件向不利于大气污染扩散方向转变,由于上述作用的存在,2015年PM_(2.5)质量浓度增加3μg/m^3,PM_(10)增加5.5μg/m^3,SO_2增加1.2μg/m^3,同时由于气溶胶影响光化学条件导致的O_3质量浓度减少1.4μg/m^3.气溶胶直接气候效应形成天气-气溶胶-天气-气溶胶之间的循环作用并不是线性的,重污染天气显著强于清洁日和平均条件,从而导致重污染天气空气质量的进一步恶化.Assuming two case, one was Aerosol direct radiation effect considered, two was Aerosol direct radiation effect not considered, Simulation the change of air quality and meteorological field during 2015 year by WRF/chem model, Quantitative analysis Relationship about weather-air quality-weather-air quality. The results showed： aerosol direct radiation effect led to the solar radiation reduced by 27.42W/m2, temperature reduced by 0.21℃, wind speed reduced by 1.1%, relative humidity increased by 1.4%, the boundary layer height mass concentration during 2015 year on Tianjin, meteorological conditions changed to uneasily diffusion. Due to the aerosol direct radiation effect, PM2.5 mass concentration increased by 3μg/m3, PM10 mass concentration increased by 5.5μg/m3, SO2 mass concentration increased by 1.2μg/m3, but O3 mass concentration reduced by 1.4μg/m3 cause by the decrease of solar radiation. Analysis that the the change of PM2.5 mass concentration about ship of weather-air quality-weather-air quality was not liner, Heavy pollution weather is significantly stronger than the cleanup day and the average condition, which leads to heavy pollution weather air quality become worse.

关 键 词：WRF/CHEM 气溶胶直接气候效应 空气质量 天津 

分 类 号：X131.1[环境科学与工程—环境科学]