Examining feedbacks of aerosols to urban climate with a model that treats 3‐D clouds with aerosol inclusions

摘要: [1] Anthropogenic aerosol particles alter clouds, radiation, and precipitation, thereby affecting weather, climate, air pollution. To examine understand such feedbacks, a module that simulates the evolution, movement, microphysics of three-dimensional size-resolved mixed-phase clouds precipitation their multicomponent inclusions was developed implemented into GATOR-GCMOM global-through-urban pollution-weather-climate model. A unique feature is chemical components are tracked in time space within liquid, ice, graupel interstitially clouds. Modeled parameters were evaluated against situ data, compared with MODIS climatologies, nested emission data down to 5 km resolution study aerosol-cloud feedbacks Los Angeles. Although updrafts not resolved during deep convection at this resolution, most shallow This also near lower limit for which hydrostatic solution vertical momentum (used here) similar nonhydrostatic solution. Aerosols Angeles found increase cloud optical depth, liquid water, fraction, net downward thermal-infrared soil moisture, relative humidity, (slightly) middle-boundary layer temperatures. decreased surface solar, near-surface Both boundary warming due black carbon cooling all increased stability, inhibiting top growth under some conditions. may feed back themselves by increasing gas dissolution, volume upon evaporation. They decrease visibility humidity photolysis below them enhancing thickness.