Evaluation of an Aerosol Prediction Model for Coastal Regions Using Marine Aerosol Generation and Transport Data.
Abstract
A mixed layer dynamic models for the structure and evolution of aerosols in a marine regime is presented. The aerosol spectrum is divided into continental and marine components, with a constant vertical continental profile assumed; both in and above the mixed layer. The aerosol spectrum is transformed into a reference relative humidity of 80%. The temporal evolution of the aerosol spectrum is predicted from rate equations which require a specification of the surface production rate, the entrainment rate and the mixed layer depth. The model was tested against the data set obtained in the Monterey Bay during the MAGAT 80 experiment. The model was initialized with both observed MAGAT data and an equilibrium initial value, gathered from the JASIN Experiment. The model was run for radii equal to 0.8, 2.0, 5.0 and 10.0 microns. The significance between the observed initial values and the JASIN data is that the MAGAT data was observed from the same air mass as the initial atmospheric data and verification aerosol data. The JASIN initial aerosol data is based on an equilibrium state as a function of only wind speed and reference relative humidity. The model continuously generated a correct gain or loss of aerosol concentrations as defined by the observed MAGAT data, and in most cases the model output is within one order of magnitude of the observed values.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1984
- Accession Number
- ADA145443
Entities
People
- D. J. Saunders
Organizations
- Naval Postgraduate School