ZHANG Wen-jing,SUN Xian,WANG Qi,et al.Analysis on Air Pollution Meteorological Characters and Atmospheric Environment Capacity in Xi’an City[J].Research of Soil and Water Conservation,2012,19(05):257-261.
西安市污染气象特征和大气环境容量分析
- Title:
- Analysis on Air Pollution Meteorological Characters and Atmospheric Environment Capacity in Xi’an City
- Keywords:
- air pollution; meteorological condition; atmospheric stability; environment capacity; Xi’an City
- 分类号:
- X511
- 摘要:
- 利用2010年西安市环境监测资料及同期气象资料，分析了3种主要污染物(SO2，NO2，PM10)的时空分布特征以及各种气象条件对城市大气污染的影响；采用A-P值法计算大气环境容量。结果表明：(1) 西安市区低空大气全年以较稳定-稳定为主，污染物浓度随稳定度频率的增大而增大；(2) 风速对污染物浓度的影响非常显著。随风速增大各污染物浓度相应减小；而在春季大风沙尘天气里，PM10浓度随风速增大而增大；(3) 降水对污染物的稀释作用很强，降水量小于1 mm时浓度不降反增，大于10 mm时稀释作用却相对减弱；(4) 受气象条件的综合影响，污染物排放造成环境容量的利用率高甚至出现超负荷现象。
- Abstract:
- The spatio-temporal distribution characteristics of three pollutants(SO2, NO2 and PM10) were analyzed by using environmental monitoring and meteorological data of Xi’an in 2010. A-P method was used to calculate atmospheric environmental capacity. The results showed that:(1) the major low altitude atmosphere in Xi’an was semi-stable or stable, and the pollutant concentration increased when stability frequency increased;(2) the wind speed affected the pollutant concentration dramatically, the pollutant concentration decreased with the increase of wind speed;PM10 was fairly positively interrelated with wind speed in the context of the strong wind and sand dust in spring;(3) the precipitation contributed very much to dilution effect, but the precipitation less than 1 mm increased the concentration of pollutants;the precipitation more than 10 mm didn’t dilute the concentration too much;(4) affected by the meteorological condition, utilization ratio of environmental capacity was overloaded due to pollutant discharge.
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备注/Memo
收稿日期:2012-3-1;改回日期:2012-4-16。
基金项目:陕西省气象局博士基金项目“西安市城市环境气象场分布对大气污染物影响研究”(2012B-4);中国可持续能源项目(G-1011-13585)
作者简介:文静(1981- )，女，硕士研究生，主要从事环境影响评价、大气成分预测等方面的研究。E-mail：mili313@163.com