| Establishing Baseline Subsurface Light Fields for the Flower Garden Banks National Marine Sancturay |
12 Apr 2011 |
11 pages |
| Authors:
Jason K Jolliff; Richard W Gould; Sergio deRada; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
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 | The Flower Garden Banks National Marine Sanctuary (FGBNMS) consists of three separate areas in the northwestern Gulf of Mexico where salt dome crests rise to within approx. 18-meters of the surface from an outer-continental shelf relief of 100-150-meters, and these geologic features provide a platform for unique coral reef ecosystems. It is known that such ecosystems are sensitive to photon flux variability, and this is particularly the case for Mesophotic ... |
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| An Analysis of Diffuse Light Attenuation in the Northern Gulf of Mexico Hypoxic Zone Using the SeaWiFS Satellite Data Record |
Jan 2011 |
11 pages |
| Authors:
Blake A Schaeffer; Geoffrey A Sinclair; John C Lehrter; Michael C Murrell; Janis C Hurtz; Richard W Gould; Diane F Yates; NAVAL RESEARCH LAB STENNIS DETACHMENT STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
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| The Sea-viewing Wide Field-of-View Sensor (SeaWiFS) derived diffuse light attenuation along the Louisiana continental shelf (LCS) was examined at monthly scales from 1998 to 2007 to characterize temporal and spatial patterns, and responsible physical forcing conditions. The SeaWiFS diffuse light attenuation ranged from 0.10 to 2.64 m(-1). Stepwise multiple linear regression analysis suggested that spatial and temporal patterns in diffuse light attenuation were influenced by wind speed, nutrient loading, and ... |
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| Beyond the First Optical Depth: Fusing Optical Data From Ocean Color Imagery and Gliders |
Jan 2009 |
12 pages |
| Authors:
M A Montes-Hugo; Richard W Gould; Robert A Arnone; Hugh Ducklow; K Carder; David English; Oscar Schofield; J Kerfoot; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
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| 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 ... |
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| Spectral Variability of Airborne Ocean Color Data Linked to Variations in Lidar Backscattering Profiles |
Jan 2009 |
12 pages |
| Authors:
M A Montes-Hugo; Richard W Gould; Zhong-Ping Lee; Robert A Arnone; Deric Gray; J Churnside; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
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| 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 ... |
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| Using Coupled Models to Study the Effects of River Discharge on Biogeochemical Cycling and Hypoxia in the Northern Gulf of Mexico |
Jan 2009 |
10 pages |
| Authors:
Bradley Penta; D Ko; Richard W Gould; Robert A Arnone; R Greene; J Lehrter; James Hagy; B Schaeffer; M Murrell; J Kurtz; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
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| We describe emerging capabilities to understand physical processes and biogeoehemical cycles in coastal waters through the use of satellites, numerical models, and ship observations. Emerging capabilities provide significantly improved ability to model ecological systems and the impact of environmental management actions on them. The complex interaction of physical and biogeoehemical processes responsible for hypoxic events requires an integrated approach to research, monitoring, and modeling in order to fully define the ... |
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| Single-Species Dominance in a Subsurface Phytoplankton Concentration at a Mediterranean Sea Front |
Jan 1990 |
12 pages |
| Authors:
Richard W Gould; Denis A Wiesenburg; NAVAL OCEANOGRAPHIC AND ATMOSPHERIC RESEARCH LAB STENNIS SPACE CENTER MS
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| A narrow band of high Chl a (23.1 ug liter-1) was observed at a salinity front in the western Mediterranean Sea in late November 1987. The biomass peak was found deep in the photic zone, at 54 m, in a region of low light. A single diatom species, Thalassiosira partheneia Schrader in gelationous colonies, represented 98% of the total phytoplankton biomass in the layer and achieved abundance. Although lack of ... |
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