Accession Number : ADA628852


Title :   CoBOP Coral Reefs: Optical Closure of a Coral Reef Submarine Light Field


Corporate Author : BIGELOW LAB FOR OCEAN SCIENCES WEST BOOTHBAY HARBOR ME


Personal Author(s) : Yentsch, Charles S ; Phinney, David A


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA628852


Report Date : 30 Sep 1999


Pagination or Media Count : 4


Abstract : LONG TERM GOALS. As a result of our success with ocean color studies in blue, oceanic waters, we believe we are in a good position to use many of the same methods for the study of coastal ocean processes. Optically active substances are more diverse in coastal waters compared to offshore. We want to know: 1) what are the processes that are responsible for changes in optical properties, 2) what are the energy sources that bring about these changes and 3) what is the magnitude and variability of the optical signals. In optically shallow waters, the effects of bottom reflectance also act to change the wavelength characteristics of the in-water optics. By achieving optical closure, above water optical remote sensing systems can be developed that will allow comparison of coastal ecosystems in time and space. OBJECTIVES. We want to predict the relative importance of substances that influence the inherent and apparent optical properties by direct measurements of the submarine light field. The advective features of the water column believed to be of major importance to optical variability are tidal flow, winds and other barotrophic effects. In turn, this variability modulates all other optical fields including benthic and remote sensing reflectance, with water depth as an important variable. Changes in benthic habitat type and benthic diversity are equally important. We wish to quantify the dominant species of the habitat by videography and assess the influence of bulk in situ benthic reflectance as a function of habitat and water depth on remote sensing reflectance.


Descriptors :   *COASTAL REGIONS , *CORAL REEFS , *OPTICAL PROPERTIES , ADVECTION , BENTHONIC ZONES , BOTTOM , CLOSURES , COMPARISON , DEPTH , ECOSYSTEMS , ENERGY , FLOW , HABITATS , OCEANS , OPTICS , REFLECTANCE , SEA WATER , SHALLOW WATER , SIGNALS , SOURCES , TIDAL CURRENTS , WATER , WIND


Subject Categories : Biological Oceanography
      Physical and Dynamic Oceanography
      Optics


Distribution Statement : APPROVED FOR PUBLIC RELEASE