CAJ | 학술논문

利用 WRF ／UCM模式对珠江三角洲2008年秋季一次大气污染过程的气象场特征进行模拟。在模式中针对下垫面类型数据和人为热通量来设置敏感性试验以探讨城市化对大气边界层特征的影响。研究结果表明：城市化发展（包括城市土地利用类型的改变以及人为热通量的加入和增加）均能增强城市热岛效应和干岛效应，使夜间地面逆温现象更加显著，地面污染物容易积累；地表粗糙度的增加使风速减小，城市化使热岛环流增强，污染物难以扩散，这也是造成空气污染事件的原因；同时城市的发展能抬升白天和夜晚的大气边界层高度。
이용 WRF ／UCM모식대주강삼각주2008년추계일차대기오염과정적기상장특정진행모의。재모식중침대하점면류형수거화인위열통량래설치민감성시험이탐토성시화대대기변계층특정적영향。연구결과표명：성시화발전（포괄성시토지이용류형적개변이급인위열통량적가입화증가）균능증강성시열도효응화간도효응，사야간지면역온현상경가현저，지면오염물용역적루；지표조조도적증가사풍속감소，성시화사열도배류증강，오염물난이확산，저야시조성공기오염사건적원인；동시성시적발전능태승백천화야만적대기변계층고도。
WRF /UCMmodel was used to simulate the meteorological characteristics of an air pollution episode over the Pearl River Delta (PRD)in autumn,2008.In order to study the impact of urbanization on atmospheric boundary layer characteristics,this article set up sensitivity experiments by changing the surface land-use type and the anthropogenic heat flux.The results showed that urbanization,including the increase of urban area,anthropogenic heat and the increase of its flux,helped to strengthen the effect of urban heat island and urban dry island,and the surface temperature inversion turned to be more obvi-ous,which resulted in the accumulation of surface pollutants.Urbanization not only decreased the wind speed due to the increase of surface roughness,but also strengthened the heat island circulation,which was adverse to the diffusion of pollutants and caused the pollution episodes in urban areas.Moreover,the urbanization could raise the atmospheric boundary layer height both in daytime and nighttime.