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Biological, Physical and Chemical Data From Gulf of Mexico Gravity and Box Core MRD05-04

Open-File Report 2007-1024
By: , , , and 
https://doi.org/10.3133/ofr20071024

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Abstract

This paper presents the benthic foraminiferal census data, magnetic susceptibility measurements, vanadium and organic geochemistry (carbon isotope, sterols, and total organic carbon) data from the MRD05-04 gravity and box cores. The MRD05-04 cores were obtained from the Louisiana continental shelf in an on-going initiative to examine the geographic and temporal extent of hypoxia, low-oxygen bottom-water content, and geochemical transport. The development of low-oxygen bottom water conditions in coastal waters is dependent upon a new source of bio-available nutrients introduced into a well-stratified water column. A number of studies have concluded that the development of the current seasonal hypoxia (dissolved oxygen < 2 mg L-1) in subsurface waters of the northern Gulf of Mexico is related to increased transport of nutrients (primarily nitrogen, but possibly also phosphorous) by the Mississippi River. However, the development of earlier episodes of seasonal low-oxygen subsurface water on the Louisiana shelf may be related to Mississippi River discharge.

Suggested Citation

Osterman, L.E., Campbell, P.L., Swarzenski, P.W., and Ricardo, J.P., 2010, Biological, Physical and Chemical Data From Gulf of Mexico Gravity and Box Core MRD05-04: U.S. Geological Survey Open-File Report 2007-1024, 18 p., https://doi.org/10.3133/ofr20071024.

ISSN: 2331-1258 (online)

ISSN: 0196-1497 (print)

Publication type Report
Publication Subtype USGS Numbered Series
Title Biological, Physical and Chemical Data From Gulf of Mexico Gravity and Box Core MRD05-04
Series title Open-File Report
Series number 2007-1024
DOI 10.3133/ofr20071024
Year Published 2010
Language ENGLISH
Publisher U.S. Geological Survey
Contributing office(s) U.S. Geological Survey
Description 18 p.
Online Only (Y/N) N
Additional Online Files (Y/N) N
Additional publication details