CAJ | 학술논문

2008年10月28～29日南京及周边地区发生了一次严重的空气污染事件,PM10、CO、SO2等大气污染物浓度急剧增高.本文综合利用地面空气污染监测资料、卫星遥感火点监测资料、气象观测和NCAR/NCEP再分析资料及气流后向轨迹模拟,分析了该次污染事件发生的天气条件和大气边界层特征以及大气污染物的来源、输送路径.结果表明,苏中、苏北地区秸秆焚烧产生的大气污染物向南京及周边地区输送,并结合不利于污染物扩散的天气形势和边界层条件,即:均压场结构、500hPa以下弱的垂直速度、涡度和散度、较低的边界层高度及逆温层的存在,以及地形因素是导致这次大气污染事件的主要原因.
2008년10월28～29일남경급주변지구발생료일차엄중적공기오염사건,PM10、CO、SO2등대기오염물농도급극증고.본문종합이용지면공기오염감측자료、위성요감화점감측자료、기상관측화NCAR/NCEP재분석자료급기류후향궤적모의,분석료해차오염사건발생적천기조건화대기변계층특정이급대기오염물적래원、수송로경.결과표명,소중、소북지구갈간분소산생적대기오염물향남경급주변지구수송,병결합불리우오염물확산적천기형세화변계층조건,즉:균압장결구、500hPa이하약적수직속도、와도화산도、교저적변계층고도급역온층적존재,이급지형인소시도치저차대기오염사건적주요원인.
During the time period between Oct.28 to Oct.29,2008,a serious air pollution event took place in Nanjing and surrounding regions,accompanying with sharply increasing of PM10,CO and SO2 in the air.Satellite remote sensing data,surface meteorological observations,air pollution index and the NCEP reanalysis dam were used to investigate the atmospheric conditions and planetary boundary layer(PBL)features.Air mass backward trajectory simulation method was employed to analyzethe airpollutants sources and transport paths of this event.The results showed that the transport of gas pollutants releasing from crop residue burning in the central and north parts of Jiangsu Province,combining with unfavorable weather condition,which was the dominating reason of this air pollution episode.It was found there was a high-pressure system with relative uniform pressure pattern,weak vertical velocity,vorticity and divergence below 500hPa,which prevented atmospheric ventilation.The inversion temperature,low mixing height and topographical forcing winds in the PBL was also not favor for the air pollutants diffusion.