CAJ | 학술논문

利用NCEP/NCAR再分析资料和中尺度天气模式MM5对2010年1月14—19日沈阳大气污染天气系统进行模拟分析。对此次天气过程的地面和高空气压场、地面至高空各高度层随时间变化的水平风场及垂直剖面风场、垂直方向温度廓线等气象要素进行分析和模拟,描述大气污染中天气系统的变化过程,分析造成大气污染的气象要素变化。结果表明：此次污染天气过程对应地面场为长白山高压、地形槽环流型;500 hPa高空天气形势为两槽一脊,地面风场主要受高压辐散气流控制;地面至高空不同高度的水平风场均有偏南风切变和偏西风切变,垂直剖面风场对应有下沉气流,地面至高空的温度廓线出现明显的逆温。这些气象条件共同造成了持续污染天气。而500 hPa位势高度场持续长时间两槽一脊的环流形势,是造成长时间污染天气的主要原因。
이용NCEP/NCAR재분석자료화중척도천기모식MM5대2010년1월14—19일침양대기오염천기계통진행모의분석。대차차천기과정적지면화고공기압장、지면지고공각고도층수시간변화적수평풍장급수직부면풍장、수직방향온도곽선등기상요소진행분석화모의,묘술대기오염중천기계통적변화과정,분석조성대기오염적기상요소변화。결과표명：차차오염천기과정대응지면장위장백산고압、지형조배류형;500 hPa고공천기형세위량조일척,지면풍장주요수고압복산기류공제;지면지고공불동고도적수평풍장균유편남풍절변화편서풍절변,수직부면풍장대응유하침기류,지면지고공적온도곽선출현명현적역온。저사기상조건공동조성료지속오염천기。이500 hPa위세고도장지속장시간량조일척적배류형세,시조성장시간오염천기적주요원인。
Based on the NCEP/NCAR reanalysis data and the meso-scale weather model MM5,a pollution weather process in Shenyang from 14-19 January 2010 was simulated.Some meteorological elements were analyzed and simulated and these include the ground and upper air pressure fields,the horizontal and vertical wind fields from the ground to the upper level as well as their variation with time,and the vertical temperature profile etc..The variation of weather system was described in this process,and the meteorological elements causing atmospheric pollution were analyzed.The results indicate that the corresponding ground filed in this process is the Changbai Mountain high pressure and topographic trough circulation type.The upper weather situation is two troughs and one ridge at 500 hPa.The ground wind field is controlled by high pressure divergence airflow.The horizontal wind fields from the ground to the upper all have the southerly wind shear and westerly wind shear,and there is the corresponding downdraft in the vertical wind field.The temperature profile shows a clearly inversion from the ground to the upper level.The above meteorological conditions together cause the persistent pollution weather,while the lasting weather situation with two troughs and one ridge at 500 hPa geopotential height field are the main reason of this process.