Title

Remote measurement of aerosol scattering properties and the development of a novel imaging solar aureole radiometer

Date of Award

1998

Availability

Article

Degree Name

Doctor of Philosophy (Ph.D.)

Department

Physics

First Committee Member

Ken Voss, Committee Chair

Second Committee Member

Howard Gordon, Committee Member

Abstract

Aerosols play important roles in determining the Earth's radiation budget as well as influencing the chemical composition of the atmosphere and interfering with remote measurements. Large uncertainties in global aerosol properties and effects make aerosols a leading source of uncertainty in understanding the Earth radiation budget. Greatly improved aerosol measurements are needed, for aerosol/climate field studies, to validate satellite measurements, and to remove aerosol interference from satellite measurements. Radiometric measurements of the solar aureole when combined with spectral extinction data can yield data products such as aerosol size distributions and aerosol phase functions for small scattering angles. Ocean color sensor calibration studies require sky radiance measurements to be made under conditions of low surface albedo, e.g., at sea. Ship motion coupled with large changes in aureole radiance over small angles require an instrument with a high signal to noise ratio, accurate pointing, fast triggering, short exposure times, low jitter, as well as sensor stability. An novel imaging radiometer which meets these requirements, as well as related data reduction software has been developed. The instrument, background theory, and data from one field expedition are described in this thesis.

Keywords

Physics, Atmospheric Science; Environmental Sciences; Remote Sensing

Link to Full Text

http://access.library.miami.edu/login?url=http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:9934267