CAJ | 학술논문

利用气象探测资料和环境监测数据，采用统计分析、环流演变分析、物理量诊断以及后向轨迹法分析了长春市浮尘发生的气候特征和2011年5月12日长春市出现的一次持续时间较长、污染程度较重的浮尘天气过程。结果表明：长春地区浮尘天气整体上呈波动性减少趋势，3-5月是主要发生时期；本次浮尘天气过程沙源来自蒙古国中部和内蒙古中东部，并随高空急流的输送影响东北地区，本地沙源没有补充；高空急流明显、地面风速较小、温度露点差较大、内蒙古东部辽宁省北部存在弱风区、整层大气稳定是该区域未出现沙尘暴而出现浮尘的主要原因。
이용기상탐측자료화배경감측수거，채용통계분석、배류연변분석、물리량진단이급후향궤적법분석료장춘시부진발생적기후특정화2011년5월12일장춘시출현적일차지속시간교장、오염정도교중적부진천기과정。결과표명：장춘지구부진천기정체상정파동성감소추세，3-5월시주요발생시기；본차부진천기과정사원래자몽고국중부화내몽고중동부，병수고공급류적수송영향동북지구，본지사원몰유보충；고공급류명현、지면풍속교소、온도로점차교대、내몽고동부요녕성북부존재약풍구、정층대기은정시해구역미출현사진폭이출현부진적주요원인。
Based on the meteorological and environmental data,a continuous floating dust pollution event on May 12,2011 in Changchun was analyzed by methods of a climate statistics,a circulation evolution,a physical diagnosis and a back trajectory analysis.The results show that the annual dust day is in a fluctuant decreasing trend in Changchun.The dust weather mainly occurs during March to May.The sand source is originated from the central Mongolia and mid-eastern of Inner Mongolia,and the dust is transported to northeast China with upper jet stream. There is no local sand source in this process.It is a continuous floating dust process rather than a sandstorm be-cause of obviously upper jet stream,smaller surface wind speed,larger temperature dew point difference,weak wind areas in the eastern Inner Mongolia and northern Liaoning province and stable atmosphere in the whole layer.