Accession Number:

ADA413727

Title:

Temporal Variability of Coastal Waters in Mississippi Bight and New York Bight Sea WiFS and MODIS

Descriptive Note:

Conference proceeding, 18-22 Nov 2002

Corporate Author:

NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV

Report Date:

2002-11-22

Pagination or Media Count:

13.0

Abstract:

We demonstrate the utility of SeaWiFS and MODIS to determine coastal optical properties for a one-year period. Optical properties derived from SeaWiFS and MODIS are compared for coastal waters in the Mississippi Bight and the New York Bight. A one-year time series from January 2001 to December 2001 with varying time scales yearly, monthly, and eight-day composites were processed with similar processing algorithms to determine the inherent optical properties absorption and backscattering of the coastal waters. The similar spectral and spatial resolution and repeat cycles of these sensors provide new methods to determine the temporal changes in the coastal processes. We assess the temporal and spatial variability and regional dependence of the optics in both regions. Processing of MODIS and SeaWiFS imagery was performed using modified NASA standard atmospheric correction methods. For both satellites, a near-infrared NIR atmospheric correction method Arnone et al, 1998 based on the assumption that the normalized water-leaving radiance, nLw, at 765- and 865-nm is not zero in the high turbid waters was applied. For both SeaWiFS and MODIS, this correction reduces the number of negative radiance values and improves the estimation of optical properties in the highly turbid coastal region.

Subject Categories:

  • Physical and Dynamic Oceanography
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE