Accession Number:

ADA634289

Title:

Characterization of Coastal Optical Properties Through the Application of Flow Field Flow Fractionation

Descriptive Note:

Corporate Author:

MIAMI UNIV FL ROSENSTIEL SCHOOL OF MARINE AND ATMOSPHERIC SCIENCE

Personal Author(s):

Report Date:

1997-09-30

Pagination or Media Count:

4.0

Abstract:

LONG-TERM GOALS. Total optical attenuation in seawater is defined by the following equation Jerlov, 1968 Ctot ap aDOM bp cw where ap absorption coefficient for particles, aDOM is the absorption coefficient for the dissolved organic matter, bp is the scattering by particles, and cw is the attenuation by water through absorption, and elastic and inelastic scattering . For coastal waters it is the first three terms of this equation that are responsible for the large range in optical attenuation and variation in color that are often observed. Also, these terms are interactive through a variety of processes involving transformations between the biota, DOM, and particulates. The processes affecting these transformations in coastal environments can be complex and dynamic they include, but are not limited to recycling, sediment resuspension, precipitation, photochemical alteration, tidal flow and other physical transport and mixing processes. The emphasis in this study is placed on characterizing the factors affecting the optical properties i.e. attenuation and fluorescence of coastal seawater. Particular emphasis is being placed on developing a better understanding of the differences and similarities between colored dissolved organic matter CDOM of marine and terrestrial origin, and the impact these properties have on the chemical and optical characteristics of coastal environments where their effects are most pronounced. The equipment assembled under this grant is being used both in the laboratory and in shipboard experiments to provide detailed characterization of the optical properties of coastal seawater. Such information once acquired can be applied to remote sensing modeling applications and the design of optical sensing detectors for probing the ocean.

Subject Categories:

  • Earth Sciences and Oceanography
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE