The Interaction of Water and Aerosols in the Marine Boundary Layer: A Study of Selected Processes Impacting Radiative Transfer and Cloudiness
Abstract
The overarching, long-term goal of the study is to explore the profound effect of aerosol-water interaction both on radiation propagation in, and the thermodynamic structure of, the marine boundary layer. Specific goals are: 1) compile a climatology of aerosol hygroscopicity for use in the NAAPS and COAMPS models, and, further, to develop a model parameterization of hygroscopicity based on aerosol size and composition for such models, 2) explore the relative impacts of cross-inversion mixing and sub-cloud aerosol on cloud thickness and cloud base height, 3) quantify and parameterize the impact of precipitation scavenging on below cloud radiative transfer and cloud liquid water path. The sampling platform utilized is the CIRPAS Twin Otter research aircraft and the venue is the littoral environment off the California coast, representative of areas with high shipping densities. For the current reporting period, our efforts have centered on completing the analysis of the combined data sets we gathered during the CARMA-IV, CARMA-III, and CARMA-II field campaigns, and an analysis of data from the Paposo, Chile site taken during the VOCALS campaign. The source attribution of CCN and aerosol light scattering requires the measurement of both the aerosol chemical composition, aerosol light scattering and the CCN activity.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 2010
- Accession Number
- ADA542057
Entities
People
- David S. Covert
- Dean A. Hegg
Organizations
- University of Washington