Open AccessEvaluation of ultraviolet radiation, ozone and aerosol interactions in the troposphere using automatic differentiation. Final report
Author(s) -
Gregory R. Carmichael,
Florian A. Potra
Publication year - 1998
Language(s) - English
Resource type - Reports
DOI - 10.2172/355037
Subject(s) - aerosol , ozone , troposphere , stratosphere , atmospheric sciences , tropospheric ozone , relative humidity , flux (metallurgy) , environmental science , ozone layer , sulfate aerosol , soot , radiation , meteorology , chemistry , physics , optics , organic chemistry , combustion
A major goal of this research was to quantify the interactions between UVR, ozone and aerosols. One method of quantification was to calculate sensitivity coefficients. A novel aspect of this work was the use of Automatic Differentiation software to calculate the sensitivities. The authors demonstrated the use of ADIFOR for the first time in a dimensional framework. Automatic Differentiation was used to calculate such quantities as: sensitivities of UV-B fluxes to changes in ozone and aerosols in the stratosphere and the troposphere; changes in ozone production/destruction rates to changes in UV-B flux; aerosol properties including loading, scattering properties (including relative humidity effects), and composition (mineral dust, soot, and sulfate aerosol, etc.). The combined radiation/chemistry model offers an important test of the utility of Automatic Differentiation as a tool in atmospheric modeling