CAJ | 학술논문

利用NCEP／NCAR再分析资料和MM 5模拟分析了2010年冬季辽宁中部城市严重灰霾天气时天气系统特征，应用CALPUFF模拟灰霾天气和2010年冬季沈阳、辽阳及本溪日平均PM10浓度分布。结果表明：500 hPa位势高度场，辽宁处于弱暖脊的位置；850 hPa位势高度场辽宁受辐散及下沉气流的影响，地面风场的风向不一致，多受辐散气流影响。在垂直剖面风场，地面上方有明显的位涡高值上升区，高度较低。地面至高空的温度廓线表明，低空有明显的逆温，逆温层顶的高度较低。2010年12月19—21日沈阳、辽阳和本溪PM10浓度分布向偏东、西北及东南方向发散，主要受地面风向影响。整个冬季平均PM10浓度分布向偏南方向发散。
이용NCEP／NCAR재분석자료화MM 5모의분석료2010년동계료녕중부성시엄중회매천기시천기계통특정，응용CALPUFF모의회매천기화2010년동계침양、료양급본계일평균PM10농도분포。결과표명：500 hPa위세고도장，료녕처우약난척적위치；850 hPa위세고도장료녕수복산급하침기류적영향，지면풍장적풍향불일치，다수복산기류영향。재수직부면풍장，지면상방유명현적위와고치상승구，고도교저。지면지고공적온도곽선표명，저공유명현적역온，역온층정적고도교저。2010년12월19—21일침양、료양화본계PM10농도분포향편동、서북급동남방향발산，주요수지면풍향영향。정개동계평균PM10농도분포향편남방향발산。
Based on NCEP/NCAR reanalysis data and MM5 ,characteristics of weather system during the most seri-ous haze process in winter of 2010 were analyzed in the central cities of Liaoning province.Characteristics of haze weather and daily mean PM10 concentrations in winter of 2010 in Shenyang,Liaoyang and Benxi were simulated by a CALPUFF model.The results indicate that it is weak warm ridge in Liaoning province at 500 hPa geopotential height field,while it is influenced by divergence and downdraft at 800 hPa geopotential height field.Surface wind directions are inconsistent,and they are affected by divergent flow.It has an obvious potential vorticity rising area above the ground and at low altitudes according to the vertical profile of wind field.It has significant inversion temperature at low altitude based on temperature profile from ground to upper level,and the top of inversion layer is lower.PM10 concentrations on December 19 to 21,2010 in Shenyang,Liaoyang and Benxi diffuse to east,north-west,southeast directions,which is influenced by surface wind direction.In the whole winter,it diffuses to south for mean PM10 concentration.