國立中央大學大氣科學學系系友會

講題：Investigation of the coupled land-atmosphere interactions



主講人：Dr. Hsin-Yuan Huang (黃信元 博士)

Department of Civil and Environmental Engineering, University of California, Los Angeles



時間：4月21日(星期二)下午2點

地點：中央大學科學一館S-325教室



摘要：



Recent studies have shown that exchanges of heat, moisture, and momentum between the atmospheric boundary layer (ABL) and land surface are important factors affecting local- and regional-scale weather and climate. The land-atmosphere interactions are processes within a fully-coupled system where the states (temperature/moisture content) of the air and land surface can have strong influences on one another. Since the General Circulation Models or Regional Climate Model using coarse grids and bulk parameterizations cannot accurately capture the diurnal land-ABL interactions, a fully-coupled framework integrating a radiation parameterization, a large-eddy simulation, and a land surface model is developed to utilize remotely sensed observations for studying realistic land-ABL interactions. This presentation includes two studies to investigate: 1) the impact of surface heterogeneity scale on the ABL, and 2) the feedbacks of atmospheric properties on the land surface states and fluxes. This framework provides a useful tool for furthering our understanding about hydrological and energy cycles in the complex land-ABL system, and ultimately for developing better sub-grid scale parameterizations used in large-scale weather/climate models.