Accession Number : AD0760713

Title :   Sequential Photography for Coastal Oceanography.

Descriptive Note : Final contract rept.,

Corporate Author : VIRGINIA INST OF MARINE SCIENCE GLOUCESTER POINT

Personal Author(s) : Nichols,Maynard ; Thompson,Galen ; Kelly,Mahlon ; Castiglione,Louis

Report Date : NOV 1972

Pagination or Media Count : 176

Abstract : Dynamic features of coastal waters can be detected and monitored in sequential photography by: (1) pattern interpretation, (2) simple comparative analyses, (3) matching of positive-negative pairs, and (4) comparative densitometry. Procedures for densitometric analyses of temporal changes are given. Application of the procedures is demonstrated by analyses of tones representing suspended sediment and plankton in the James estuary and lower Chesapeake Bay. Field and photographic studies revealed four types of water color boundaries that form either in local convergence zones of secondary currents or where water masses of different origin meet. Color changes were partly due to sediment concentration differences and were sometimes manifest by microplankton community changes, but the relationships are complex and variable. (Author)

Descriptors :   (*AERIAL PHOTOGRAPHY, *OCEANS), (*SEQUENTIAL PHOTOGRAPHY, OCEANS), PHOTOINTERPRETATION, BAYS, PLANKTON, CHESAPEAKE BAY, DENSITOMETERS, PERIODIC VARIATIONS

Subject Categories : Biological Oceanography
      Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE