Accession Number:

ADA512871

Title:

Spectral Variability of Airborne Ocean Color Data Linked to Variations in Lidar Backscattering Profiles

Descriptive Note:

Conference paper

Corporate Author:

NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV

Report Date:

2009-01-01

Pagination or Media Count:

12.0

Abstract:

Characterization of 3-D underwater light fields from above the sea surface requires passive and active remote sensing measurements. In this work, we suggest the use of passive ocean color sensors and lidar Light Detection and Ranging to examine the vertical structure of optical properties in marine waters of the Northern Part of the Gulf of Alaska NGOA. We collected simultaneous airborne remote sensing reflectance Rrs in the spectral range 443-780 nm MicroSAS, Satlantic and lidar-derived volume backscattering beta profiles 0-20 m depth, wavelength 532 nm during August 17 2002 in shelf waters situated south of Kodiak Island off Alaska 57.48 degrees-58.04 degrees N, 152.91 degrees-151.67 degrees W. We evaluated the spectral response of Rrs to perturbations on the vertical distribution of beta by comparing the spatial variability between aggregated 250 m horizontal resolution x 1 m vertical resolution Rrs spectral ratios and different lidar statistics per bin Maximum beta per bin, mean beta per bin, betasub m, standard deviation of beta per bin, betasub std, integrated beta per bin, betasub int or group of bins lidar volume extinction coefficient of beta between 0 and 5 m depth. Sub-surface changes of betasub m, betasub int, and betasub std were mainly correlated with Rrs 490Rrs 555 variability along the flight-track Semi-partial correlation coefficients 0.12 to 0.21. Our results evidenced linkages between above and below-sea surface optical properties that can be used to derive water optical constituents as a function of depth based on combined passive-active data.

Subject Categories:

  • Physical and Dynamic Oceanography
  • Optical Detection and Detectors
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE