气溶胶直接气候效应对天津气象和空气质量的影响

发布时间：2018-01-13 05:26

  本文关键词：气溶胶直接气候效应对天津气象和空气质量的影响　出处：《中国环境科学》2017年03期 　论文类型：期刊论文

  更多相关文章： WRF/CHEM 气溶胶直接气候效应 空气质量 天津

【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.
[Abstract]:Based on the on-line atmospheric chemistry model WRF / schema, it is assumed that the direct climate effect of aerosol should be taken into account in order to give full play to the advantages of the online model. In 2015, the evolution of meteorological field and air quality in Tianjin was simulated and compared with the observed data. The relationship between weather, aerosol, weather and air quality is analyzed quantitatively. The results show that the direct climatic effect of aerosol in 2015 resulted in the decrease of surface solar radiation in Tianjin by 27.42 W / mm2. The temperature decreases by 0.21 鈩，

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