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Project Title: |
NGOMEX 2009 - Mechanisms Controlling Hypoxia: Integrated Causal Modeling |
Project Status: |
Submitted |
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Principal Investigator: |
Steven F. DiMarco, TAMU_CS |
Project Institution: |
TAMU_Galv |
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Project ID: |
103119 |
Version #: |
1 |
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Date Submitted: |
9/7/2011 4:11:00 PM |
Created By: |
Antonietta Quigg |
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Date Last Modified: |
9/7/2011 4:11:00 PM |
URI Serial #: |
None |
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Funding Agencies: |
NOAA - NOS-NCCOS-2009-2001466 - Funded |
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Summary of Field Work: |
The physical and biogeochemical processes that control and maintain the hypoxic zone in the northern Gulf of Mexico are complex and their relative strengths are known to vary temporally and spatially at many scales. Although close to the Mississippi River Delta, the mechanisms that maintain and sustain the hypoxia are mostly driven by biological processes, further downstream the dominant controlling processes are mostly physical as currents and winds combine to break down the vertical stratification necessary to sustain the low dissolved oxygen. Because the eastern region of the shelf, between 91°W and 89°W, is almost always hypoxic in mid-summer, it is variability of the western region, between 91°W, the Texas border and west, that largely controls the total size of the hypoxic area in a given year. Investigations of water quality data from coastal Texas have shown that hypoxic conditions frequently occur there and with variable driving factors. Therefore, understanding the interactions of the physical, biological, and geochemical processes and their variability throughout the shelf is critical for a comprehensive description of the mechanisms that control hypoxia.
A comprehensive, integrated, and multidisciplinary study of the Texas-Louisiana Shelf is proposed that includes multidisciplinary moored time-series observations (two real-time reporting and one autonomous/internally recording), two seasonal interdisciplinary process cruises near the mooring locations, two summertime shelf-wide surveys using a undulating towed sensor (to determine spatial extent of hypoxia), and remote sensing observations. The field component is designed to complement, and provide rates and other parameters necessary for the initiation, control, and skill assessment of a realistic coupled three-dimensional hydrodyamic-biological-geochemical-sediment numerical modeling and statistical (multivariate) modeling elements. A diagenetic model of the upper seabed, sediment resuspension, and surface gravity waves will be coupled to this model as previous studies have indicated that seabed processes can impact oxygen consumption and contribute to the variability of the hypoxic area.
The principal scientific objective of this study is to build upon a previously funded (2003-2009) and proven realistic coupled hydrodyamic-biological-geochemical-sediment numerical model of the northern Gulf of Mexico that is capable of resolving the dominant oceanographic processes that control the timing, duration, and severity of hypoxia of the region. Observations and modeling activities will be coordinated with relevant and existing federal and state funded operational and regional efforts and other regional investigators through active data exchange and participation and sample collection on appropriate and available cruises of opportunity. |
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Summary of Facility Requirements: |
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Summary of other requirements and comments: |
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Type of Request: |
Primary Ship Use |
Request Status: |
Submitted |
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Request ID: |
1004903 |
Created By: |
Antonietta Quigg |
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Date Last Modified: |
9/7/2011 4:11:00 PM |
Date Submitted: |
9/7/2011 4:11:00 PM |
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Year: |
2012
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Ship/Facility: |
Pelican
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Optimum Start Date:
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8/7/2012 |
Dates to Avoid: |
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Earliest Start Date: |
8/7/2012 |
Multi-Ship Op: |
No |
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Latest Start Date: |
8/12/2012 |
Other Ship(s): |
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Operating Days Needed: |
Science Days |
Mob Days |
De-Mob Days |
Estimated Transit Days |
Total Days |
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6 |
0 |
0 |
0 |
6 |
Repeating Cruise?
(within same year) |
Yes |
Interval: |
4 months |
# of Cruises: |
2 |
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Description of Repeating cruise requirements: |
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Justification/Explanation for ship choice, dates,
conflicts, number of days & multi-ship operations: |
we would like these dates as they coincide with dates of cruises conducted in 2010 and 2011. in addition, we would like these dates are they reflect periods when typically there is no hypoxia (April) and hypoxia (August) in the Gulf. Given the nature of the program, which is to study mechanisms controlling hypoxia these choices are key.
lastly, these dates work for the persons who will be chief scientists and executing the science during the cruises |
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Short Description of Op Area
for use in schedules: |
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| Description of Op Area: |
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| Op Area Size/Dia.: |
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Lat/Long |
Marsden Grid |
Navy Op Area |
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Beginning
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31.024° N
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89.347° W
map
31° 1.44' N
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89° 20.82' W
map
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Ending
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31.024° N
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89.347° W
map
31° 1.44' N
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89° 20.82' W
map
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Show Degrees Minutes |
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Foreign Clearance Required? |
No |
Coastal States:
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 Important Info on Foreign Research Clearances
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Are you or any member in your science party bringing in any science equipment items which are regulated for export by the International Traffic in Arms Regulations (ITAR) and/or the Export Administration Regulations (EAR)?
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No |
If yes, have you applied for the necessary permits through your export control office?
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No |
| Questions about ITAR/EAR regulations?
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Comments about foreign clearance requirements or
description of any other special permitting requirements
(e.g., MMPA, ESA, IHA, Marine Sanctuaries, etc.) |
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Requested Start Port |
Intermediate Port(s) |
Requested End Port |
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Cocodrie, LA, USA |
None |
Cocodrie, LA, USA |
Explanation/justification for requested
ports and dates of intermediate stops
or to list additional port stops |
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Important Info on Working in Foreign Ports
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Chief Scientist: |
Steven F. DiMarco, TAMU_CS |
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# in Science Party |
14 |
# of different science teams |
2 |
# Marine Technicians to be
provided by ship operator:
(include in science party total)
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1 |
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Explanation of Science Party Requirements and Technician Requirements |
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 Dynamic Positioning | ADCP | Multibeam | Seismic |
| Dredging/Coring/Large Dia. Trawl Wire | Stern A-frame | Fiber Optic (.681) | 0.680 Coax Wire |
| SCUBA Diving |  Radioisotope use - briefly describe | NO Radioisotope use/Natural level work | Other Operator Provided Inst. - Describe |
| 1 PI-Provided Vans - briefly describe | MOCNESS | | |
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Explain Instrumentation or Capability
requirements that could affect choice
of ship in scheduling. |
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Explain Major Ancillary Facilities
Requirements and list description
and provider for "other" systems. |
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