Accession Number:

ADA513120

Title:

Beyond the First Optical Depth: Fusing Optical Data From Ocean Color Imagery and Gliders

Descriptive Note:

Conference proceedings

Corporate Author:

NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV

Report Date:

2009-01-01

Pagination or Media Count:

12.0

Abstract:

Optical properties derived from ocean color imagery represent vertically-integrated values from roughly the first attenuation length in the water column, thereby providing no information on the vertical structure. Robotic, in situ gliders, on the other hand, are not as synoptic, but provide the vertical structure. By linking measurements from these two platforms we can obtain a more complete environmental picture. We merged optical measurements derived from gliders with ocean color satellite imagery to reconstruct vertical structure of particle size spectra PSD in Antarctic shelf waters during January 2007. Satellite-derived PSD was estimated from reflectance ratios using the spectral slope of paniculate backscattering. Average surface values 0-20 m depth of were spatially coherent I to 50 km resolution between space and in-water remote sensing estimates. This agreement was confirmed with shipboard vertical profiles of spectral backscattering llydroScat-6. It is suggested the complimentary use of glider-satellite optical relationships, ancillary data e.g., wind speed and ecological interpretation of spatial changes on particle dynamics e.g., phytoplankton growth to model underwater light fields based on cloud-free ocean color imagery.

Subject Categories:

  • Cartography and Aerial Photography
  • Physical and Dynamic Oceanography
  • Miscellaneous Detection and Detectors
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE