CAJ | 학술논문

2012年6月8~11日,江苏安徽2省发生了一次持续性的空气污染过程.利用MODIS观测的气溶胶产品和地面气象资料,结合火点监测资料和HYSPLIT后向轨迹模式,分析气溶胶光学厚度(AOD)、细粒子比例(FMF)、空气污染指数(API)的特征,探究这次空气污染的形成原因.研究表明,这次过程中苏皖2省8个代表城市的能见度大部分时间低于10km,相对湿度低于90%,API均达到或超过污染等级,AOD显著增长,且污染物以人类活动产生的细粒子为主.区域细粒子比例(RFMF)达0.79,高FMF(>0.6)出现的概率高达74.8%.另外,苏皖2省稳定的天气形势,不利于污染物扩散.6月8~11日,苏皖2省(北部地区为主)出现大量的火点,表明有秸秆焚烧现象的存在.从HYSPLIT模式的模拟结果来看,苏皖2省8个代表城市在此期间主要受到偏西方向的气流以及局地气流的影响,偏西方向的气流有利于外部秸秆焚烧的污染物经过输送影响本地区,同时局地气流不利于扩散,从而造成污染物积累,形成污染.
2012년6월8~11일,강소안휘2성발생료일차지속성적공기오염과정.이용MODIS관측적기용효산품화지면기상자료,결합화점감측자료화HYSPLIT후향궤적모식,분석기용효광학후도(AOD)、세입자비례(FMF)、공기오염지수(API)적특정,탐구저차공기오염적형성원인.연구표명,저차과정중소환2성8개대표성시적능견도대부분시간저우10km,상대습도저우90%,API균체도혹초과오염등급,AOD현저증장,차오염물이인류활동산생적세입자위주.구역세입자비례(RFMF)체0.79,고FMF(>0.6)출현적개솔고체74.8%.령외,소환2성은정적천기형세,불리우오염물확산.6월8~11일,소환2성(북부지구위주)출현대량적화점,표명유갈간분소현상적존재.종HYSPLIT모식적모의결과래간,소환2성8개대표성시재차기간주요수도편서방향적기류이급국지기류적영향,편서방향적기류유리우외부갈간분소적오염물경과수송영향본지구,동시국지기류불리우확산,종이조성오염물적루,형성오염.
During June 8-11 2012, a continuous air pollution event occurred in Jiangsu and Anhui provinces. By using MODIS sensor aerosol productions, meteorological data and fire-spot data as well as HYSPLIT backward trajectory mode, Aerosol Optical Depth (AOD), Fine Mode Fraction (FMF) and Air Pollution Index (API) were analyzed to reveal the possible reasons for this event. Results indicated that, the visibilities in eight cities of the two provinces were mostly less than 10 km, and the relative humidities were below 90%. The API was equal to or exceeded the pollution grade. There was a significant increasing for AOD during this event. Fine particles emitted from human activities were dominated pollutants. The Regional Fine Mode Fraction (RFMF) was up to 0.79, and the frequency for FMF higher than 0.6 was 74.8%. During the pollution course, the weather condition was steady and unfavorable for pollutants dispersing. In June 8-11, lots of fires spots appeared indicating there were biomass burning events according to the MODIS sensor. Backward trajectory analysis indicated that the air in the eight cities were mostly influenced by air masses from the west which may introduce pollutants emitted from biomass burning. Local air masses also influence the air quality in these cities which were not favourable for air dispersing. Then the pollutants will be easily accumulated to form pollution.