scholarly journals Three-dimensional propagation of seismic airgun signals in the Mississippi Canyon area of the Gulf of Mexico

2021 ◽  
Vol 1 (2) ◽  
pp. 026001
Author(s):  
Ying-Tsong Lin
2002 ◽  
Vol 36 (3) ◽  
pp. 51-54
Author(s):  
Toby N. Jones

The Mica Wreck (so named because it lies in the Mississippi Canyon area of the Gulf of Mexico) lies in 810 MSW, approximately 50 kilometers south of the Louisiana coast. The shipwreck will be surveyed and partially excavated in July 2002 with the aid of the U.S. Navy's NR-1 nuclear powered research submarine and several remotely operated vehicles (ROVs). The primary goal of the excavation is to recover artifacts that will help determine the identity and origin of the wreck. The excavation is significant because it represents the first scientific study of a deepwater shipwreck in the Gulf of Mexico. This paper will discuss the historical background and the innovative methods to be used during the excavation.


2018 ◽  
Vol 15 (11) ◽  
pp. 3561-3576 ◽  
Author(s):  
Fabian A. Gomez ◽  
Sang-Ki Lee ◽  
Yanyun Liu ◽  
Frank J. Hernandez Jr. ◽  
Frank E. Muller-Karger ◽  
...  

Abstract. Biogeochemical models that simulate realistic lower-trophic-level dynamics, including the representation of main phytoplankton and zooplankton functional groups, are valuable tools for improving our understanding of natural and anthropogenic disturbances in marine ecosystems. Previous three-dimensional biogeochemical modeling studies in the northern and deep Gulf of Mexico (GoM) have used only one phytoplankton and one zooplankton type. To advance our modeling capability of the GoM ecosystem and to investigate the dominant spatial and seasonal patterns of phytoplankton biomass, we configured a 13-component biogeochemical model that explicitly represents nanophytoplankton, diatoms, micro-, and mesozooplankton. Our model outputs compare reasonably well with observed patterns in chlorophyll, primary production, and nutrients over the Louisiana–Texas shelf and deep GoM region. Our model suggests silica limitation of diatom growth in the deep GoM during winter and near the Mississippi delta during spring. Model nanophytoplankton growth is weakly nutrient limited in the Mississippi delta year-round and strongly nutrient limited in the deep GoM during summer. Our examination of primary production and net phytoplankton growth from the model indicates that the biomass losses, mainly due to zooplankton grazing, play an important role in modulating the simulated seasonal biomass patterns of nanophytoplankton and diatoms. Our analysis further shows that the dominant physical process influencing the local rate of change of model phytoplankton is horizontal advection in the northern shelf and vertical mixing in the deep GoM. This study highlights the need for an integrated analysis of biologically and physically driven biomass fluxes to better understand phytoplankton biomass phenologies in the GoM.


2009 ◽  
Vol 319 (1) ◽  
pp. 29-49 ◽  
Author(s):  
T. McGee ◽  
L. Macelloni ◽  
C. Lutken ◽  
A. Bosman ◽  
C. Brunner ◽  
...  

AAPG Bulletin ◽  
2018 ◽  
Vol 102 (04) ◽  
pp. 691-708 ◽  
Author(s):  
Fausto Mosca ◽  
Thomas Hantschel ◽  
Obren Djordjevic ◽  
Jim McCarthy ◽  
Ana Krueger ◽  
...  

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