CAJ | 학술논문

利用Mie散射激光雷达 EZLidar和自动观测站气象资料对河北香河站2006年8月~2007年11月大气混合层高度( MLH)进行了观测研究,得出了灰霾和非灰霾两种天气大气混合层的日变化特征：① MLH的日变化同温度、风速的变化密切相关,相关系数分别为0．968、0．580,通过了0．01的置信度检验；②春季的MLH明显高于秋、冬两个季节,秋冬两季混合层的发展相似,MLH较低,大体上秋季的MLH高于冬季；③灰霾天气溶胶含量高,阻挡地面长波辐射向外发射,形成了类似的保温效应,灰霾天大气温度要高于非霾天的温度,且随着时间的增加而增加；④灰霾天属于静稳天气,热力引起的湍流非常弱,风速变化对它的影响更大。热力和机械剪切作用共同影响了灰霾天和非灰霾天MLH的日变化。
이용Mie산사격광뢰체 EZLidar화자동관측참기상자료대하북향하참2006년8월~2007년11월대기혼합층고도( MLH)진행료관측연구,득출료회매화비회매량충천기대기혼합층적일변화특정：① MLH적일변화동온도、풍속적변화밀절상관,상관계수분별위0．968、0．580,통과료0．01적치신도검험；②춘계적MLH명현고우추、동량개계절,추동량계혼합층적발전상사,MLH교저,대체상추계적MLH고우동계；③회매천기용효함량고,조당지면장파복사향외발사,형성료유사적보온효응,회매천대기온도요고우비매천적온도,차수착시간적증가이증가；④회매천속우정은천기,열력인기적단류비상약,풍속변화대타적영향경대。열력화궤계전절작용공동영향료회매천화비회매천MLH적일변화。
The mixed layer height( MLH) in Xianghe,Hebei was observed and studied based on Mie scattering lidar EZ lidar and automatic observatory meteorological data from August 2006 to November 2007. The diurnal vari-ation of the MLH in haze and fine days are obtained:①The diurnal variation of MLH was closely related with the change of air temperature and wind speed, with the correlation coefficient was 0. 968 and 0. 580 respectively, and passed the test of confidence level of 0. 01;②MLH in spring was obviously higher than that in autumn and winter, the development of mixed layer was similar in autumn and winter, in general, MLH was higher in autumn than win-ter;③The high loading of aerosol in haze weather prevented the ground long-wave radiation from emitting outward, the heat preservation effect made the temperature in haze days higher than that in fine days and the difference in-creased over time; ④ As the haze weather was in a state of static stability and the turbulence caused by heat was very weak, the change of wind speed had a greater impact on the development of MLH. The diurnal variation of MLH in haze and fine days were affected both by thermal and mechanical shearing action.