Platin (plant-atmosphere interaction) I: A model of plant-atmosphere interaction for estimating absorbed doses of gaseous air pollutants

A PLant-ATmosphere INteraction model (PLATIN) was developed for estimating air pollutant absorbed doses under ambient conditions. PLATIN is based on the canopy energy balance combined with a gas transport submodel. The model has three major resistance components: (1) a turbulent atmospheric resistance R-ah(z(m)) that describes the atmospheric transport properties between a measurement height above the canopy and the conceptual height z = d + z(0m) which represents the sink for momentum according to the big-leaf concept; (2) a quasi-laminar layer resistance R-b,R-A that quantifies the way in which the transfer of sensible heat and matter (e.g. latent heat, ozone) differs from momentum transfer; (3) a canopy or surface resistance R-c,R-A that describes the influences of the plant/soil system on the exchange processes. Soil water content is simulated by a Force-Restore model. By a simple interception submodel precipitation and dew are partitioned into intercepted water and water reaching the soil surface. PLA TIN can be run in a prognostic or a diagnostic mode. It is also intended for on-line use in air quality monitoring networks. (C) 1998 Elsevier Science Ltd. All rights reserved.