CAJ | 학술논문

利用常规气象观测资料和NCEP/NCAR提供的6 h再分析资料（分辨率为1°×1°），对2013年1月12～16日发生在山东中西部地区的一次持续性大雾天气过程从环流背景、层结条件、动力和热力学机制等方面进行了诊断分析。结果表明：中高层偏西气流、对流层低层温度脊和地面冷高压的稳定维持为这次持续性大雾过程提供了有利的环流背景；大雾过程经历了辐射雾-平流辐射雾-平流雾的复杂演变阶段，不同阶段的大雾湿层厚度及逆温强度有所不同；适当的风速和低层弱的水汽辐合有利于大雾稳定维持和发展；近地层辐合上升、中高层辐散下沉，易在界面形成逆温层，有利于大雾的出现，而整层的辐合上升运动往往容易形成中高云，不利于近地层水汽的聚集，难以形成大雾。
이용상규기상관측자료화NCEP/NCAR제공적6 h재분석자료（분변솔위1°×1°），대2013년1월12～16일발생재산동중서부지구적일차지속성대무천기과정종배류배경、층결조건、동력화열역학궤제등방면진행료진단분석。결과표명：중고층편서기류、대류층저층온도척화지면랭고압적은정유지위저차지속성대무과정제공료유리적배류배경；대무과정경력료복사무-평류복사무-평류무적복잡연변계단，불동계단적대무습층후도급역온강도유소불동；괄당적풍속화저층약적수기복합유리우대무은정유지화발전；근지층복합상승、중고층복산하침，역재계면형성역온층，유리우대무적출현，이정층적복합상승운동왕왕용역형성중고운，불리우근지층수기적취집，난이형성대무。
Based on the conventional observation data and NCEP 1 °×1 °reanalysis data,the circulation background,atmospheric strati-fication,dynamic and thermal struture for a sustained heavy fog from 12 to 16 January 2013 in central and western Shandong Province were analyzed.The results showed that the straight westly air flow in middle and upper level,the warm temperature ridge at low level of troposphere and the persistant surface cold high provided an appropriate condition for the sustained heavy fog weather event.The sus-tained fog event went through three phases including radiation fog,radiation-advection fog and advection fog,the thickness of moist layer and the intensity of temperature inversion were different in different phases of the fog event.The proper wind velocity and low-level weak water vapor convergence were favourable to the fog weather.The low-level convergence ascending movement and middle-high level divergence descending movement formed inversion layer at the interface,which was favorable to appearence of the thick fog, while the entire level convergence ascending movement was easy to form medium and high cloud,which wasn’t favourable to vapour gathering,so there was no thick fog.