CAJ | 학술논문

利用2013年12月1—9日淮安市气象观测资料、空气污染监测资料和探空资料，对2013年12月初中国中东部地区一次大范围持续性重度雾霾过程的气象要素、PM2.5浓度和大气边界层特征进行了分析。结果表明：此次淮安地区持续性雾霾过程高空为偏西气流，冷空气弱且850 hPa 有暖平流输送，为雾霾持续的背景条件。在此次持续性雾霾过程中，PM2.5日平均浓度均大于0.075 mg·m －3，与能见度呈反相关关系；高质量浓度的 PM2.5长时间堆积使低能见度维持，随着湿度的增大或减小，雾霾交替出现。边界层中低层维持的逆温层结不利于大气湍流、水汽垂直交换及污染物垂直扩散，为雾霾长时间维持提供了良好的热力条件；混合层高度低且上升运动弱，为此次持续性雾霾过程提供了良好的动力条件。
이용2013년12월1—9일회안시기상관측자료、공기오염감측자료화탐공자료，대2013년12월초중국중동부지구일차대범위지속성중도무매과정적기상요소、PM2.5농도화대기변계층특정진행료분석。결과표명：차차회안지구지속성무매과정고공위편서기류，랭공기약차850 hPa 유난평류수송，위무매지속적배경조건。재차차지속성무매과정중，PM2.5일평균농도균대우0.075 mg·m －3，여능견도정반상관관계；고질량농도적 PM2.5장시간퇴적사저능견도유지，수착습도적증대혹감소，무매교체출현。변계층중저층유지적역온층결불리우대기단류、수기수직교환급오염물수직확산，위무매장시간유지제공료량호적열력조건；혼합층고도저차상승운동약，위차차지속성무매과정제공료량호적동력조건。
Based on meteorological observation data,pollution monitoring data and the sounding data on December 1 to 9,2013 in Huaian,meteorological elements,concentrations of PM2.5 and characteristics of atmospheric bounda-ry layer of a large regional sustained severe fog and haze process on early December of 2013 were analyzed.The results show that there is westerly air flow at upper level,weak cold air and weak warm advection at 850 hPa.They supply favorable background for this process.In the course of fog and haze,daily average concentration of PM2.5 is greater than 0.075 mg·m -3 ,and it is in a negative correlation with visibility.Long accumulation of PM2.5 high concentrations makes low visibility maintaining.With the increase or decrease of relative humidity,fog and haze al-ternate appearance.Inversion layer near the surface restrains atmospheric turbulences,vertical exchanges of water vapor as well as vertical diffusion of pollutants,which creates thermal conditions for long time maintenance of fog and haze.Mixing layer height is low and upward motion is weak,which provides good dynamic conditions for this process.