Effect of Clouds on the Diurnal Evolution of the Atmospheric Boundary-Layer Height Over a Tropical Coastal Station

摘要: The growth of the daytime convective atmospheric boundary layer, which plays a pivotal role in vertical mixing and dispersal water vapour pollutants, is modulated by cloud radiative effects. Assessment this effect sparse any geographical region non-existent over tropical coastal regions. We investigate clouds on diurnal evolution boundary-layer height location Thumba (8.5°N, 77°E) during onshore offshore flow using multi-year (2010–2016) microwave radiometer profiler observations. both cloudy clear-sky periods increases rapidly from 0800 LT (local time = UTC + 5.1 h) to attain peak around noon (400–1500 m). seasonal mean noontime layer lower than that by > 900 m (> 400 m) when (onshore) prevails winter pre-monsoon seasons. forenoon rate rapid (> 380 m h−1) compared (160 m h−1), (160–250 m (> 100 m flow. Effects shortwave forcing soil temperature their interdependencies are presented. These observations reveal contrasting significant flow, coupled effects regions, provide essential constraints for evaluating model simulations.