CAJ | 학술논문

选取2007年12月13-14日南京一次辐射雾的外场观测资料及NCEP的2.5°×2.5°NC再分析资料和GDAS全球1°×1°气象资料，从天气形势背景、气象要素以及物理量场等方面，探讨雾形成和持续的主要边界层物理和天气学成因；并利用HYSPLIT-4轨迹模式对此次雾过程进行后向轨迹分析。分析表明：（1）此次雾过程期间始终存在逆温层，甚至出现多层逆温。逆温层的存在，使大气层结更加稳定，利于雾的形成和发展。（2）此次辐射雾过程水汽输送较平流辐射雾小，水汽来源主要来自本地辐射降温后的水汽凝结。（3）此次雾过程地面受高压控制，低层水汽通量散度为正值，近地面有弱辐散，利于辐射降温水汽凝结，而持续的水汽辐散造成的水汽流出以及雾后期随着北部干冷空气南下使得这次辐射雾寿命较短。
선취2007년12월13-14일남경일차복사무적외장관측자료급NCEP적2.5°×2.5°NC재분석자료화GDAS전구1°×1°기상자료，종천기형세배경、기상요소이급물리량장등방면，탐토무형성화지속적주요변계층물리화천기학성인；병이용HYSPLIT-4궤적모식대차차무과정진행후향궤적분석。분석표명：（1）차차무과정기간시종존재역온층，심지출현다층역온。역온층적존재，사대기층결경가은정，리우무적형성화발전。（2）차차복사무과정수기수송교평류복사무소，수기래원주요래자본지복사강온후적수기응결。（3）차차무과정지면수고압공제，저층수기통량산도위정치，근지면유약복산，리우복사강온수기응결，이지속적수기복산조성적수기류출이급무후기수착북부간랭공기남하사득저차복사무수명교단。
A detailed analysis of the synoptic situation, meteorological ifelds was made to get the features of the boundary layer during the fog events which occurred on December 13-14, 2007 by the observation ifeld data, NCEP’s 2.5°×2.5°NC reanalysis data and GDAS Global 1°×1°meteorological data. The results show that:(1) The presence of inversion layer, even multi-layer inversion throughout the fog events, indicates that the atmosphere is more stable, which was conducive to the convergence of water vapor before fog formation, then not favorable for the divergence of water vapor after fog formation, which helped the development and maintenance of the fog. (2) The water vapor lfux transported in radiation fog was smaller than the advection-radiation one, and the water vapor in radiation fog was mainly from the local moisture condensation. (3) The surface was dominated by high pressure, during the radiation fog event, the divergence of water vapor lfux was always positive, indicating that the water vapor near the surface was easy to be held and conducive to radiation cooling during the radiation fog event, while the divergence of water vapor lfux and the northern cold air made the fog life a little too short.