A Modeling Investigation of the Effects of Solid-Phase Cloud Hydrometeors in Convective Clouds on Chemical Distributions and DepositionEPA Grant Number: U915641
Title: A Modeling Investigation of the Effects of Solid-Phase Cloud Hydrometeors in Convective Clouds on Chemical Distributions and Deposition
Investigators: Stuart, Amy L.
Institution: Stanford University
EPA Project Officer: Michaud, Jayne
Project Period: August 1, 1999 through August 31, 2002
Project Amount: $93,980
RFA: STAR Graduate Fellowships (1999) RFA Text | Recipients Lists
Research Category: Academic Fellowships , Air Quality and Air Toxics , Fellowship - Atmospheric Sciences
The objective of this research project is to improve our understanding of the impacts of convective clouds on airborne chemical distributions and acid deposition, through a numerical modeling investigation of the effects of interactions of ice-phase hydrometeors.
Several representations of solid hydrometeor interactions into a three-dimensional cloud model will be implemented to systematically investigate the range of their potential impacts on chemistry. Data from field measurements, including the Stratospheric Tropospheric Experiment: Radiation, Aerosols, and Ozone, Part A, Deep Convection and the Chemical Composition of the Upper Troposphere and Lower Stratosphere (STERAO-A) field campaign, will be used for comparison and validation of modeling results.
The research will show that solid-phase processes lead to increased acid deposition, decreased transport of oxidized nitrogen species to the upper troposphere where they impact the chemistry of ozone, and increased rates of photolysis chemistry in the upper troposphere.