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AMOR
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2021
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Hugh R. Sharp
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Project Title: |
Collaborative Research: In situ oxidation rates of methane injected from seafloor gas seeps |
Project Status: |
Submitted |
Principal Investigator: |
Chris Martens, UNC_CH |
Project Institution: |
UNC |
Project ID: |
106589 |
Version #: |
2 |
Date Submitted: |
8/14/2019 3:31:00 PM |
Created By: |
Howard Mendlovitz |
Date Last Modified: |
12/17/2019 10:04:00 AM |
URI Serial #: |
None |
Funding Agencies: |
NSF/OCE/CO - 1948824 - Funded |
Summary of Field Work: |
Hundreds of recently discovered gas seeps along the continental margin north of Cape Hatteras, off North Carolina and in the northern Gulf of Mexico inject huge amounts of dissolved methane into overlying Mid-Atlantic Bight and Gulf bottom waters. Rates of microbial aerobic methane oxidation (AMOR) and changes in the microbial community in response to methane injection in bottom waters are largely unknown because of a previous lack of sustained in situ measurements that can help determine the role of gas seep releases in carbon cycling processes and respiration. This study will utilize newly developed methane sensors and free vehicle mini-landers (ML’s) to investigate AMOR and microbial community responses to methane releases near and potential impacts of dissolved methane injection from natural seeps on the continental margin off North Carolina and in the Green Canyon area of the northern Gulf of Mexico. We have proposed three oceanographic cruises, two for ten days each in 2021 off NC and one for ten days in 2022. During each cruise we will repeatedly deploy up to four ML’s on the seafloor at 300 to 500 m depth of NC centered around and at 500 and 1200 m in the Gulf at well know Green Canyon sites within lease blocks GC185 and GC600. We will use a video camera-equipped launcher to deploy each ML. The ML’s will perform AMOR measurements that can be monitored live from the ships and will collect bottom water samples for microbiol community analysis before returning on command from the seafloor. We will also collect Niskin bottle water samples and ohysical data from the ships’ rosette CTD system. We wish to schedule the 2021 cruises for May and August on the R/V Sharp out of Delaware and the single 2022 cruise o the R/V Pelican out of Louisiana for the July-August period. |
Summary of Facility Requirements: |
We will need berths for up to 12 scientists although 10 may suffice. We will need 0.322 or 0.680 conducting cable for the launcher system to deploy 650 lb ML’s using dual video camera assistance and have previously performed these operations on the R/V Pelican. We will provide the launcher system previously used in our ML deployments and owned by the University of Georgia (available to us at cost of insurance). We will work with the R/V Sharp facility to enable cable access for use of the launcher at depths up to 500 meters. |
Summary of other requirements and comments: |
We own a TrackPoint USBL system and beacons suitable for use at depths to 500 meters for the NC shelf/slope cruises and will use an existing USBL system on the R/V Pelican for deeper water work in the Gulf |
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Type of Request: |
Primary Ship Use |
Request Status: |
Submitted |
Request ID: |
1010640 |
Created By: |
Howard Mendlovitz |
Date Last Modified: |
8/15/2019 9:43:00 AM |
Date Submitted: |
8/14/2019 3:31:00 PM |
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Year: |
2021
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Ship/Facility: |
Hugh R. Sharp
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Optimum Start Date:
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5/7/2021 |
Dates to Avoid: |
Not before May 5 due to Class schedules |
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Earliest Start Date: |
5/5/2021 |
Multi-Ship Op: |
No |
Latest Start Date: |
5/12/2021 |
Other Ship(s): |
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Operating Days Needed: |
Science Days |
Mob Days |
De-Mob Days |
Estimated Transit Days |
Total Days |
7 |
1 |
1 |
1 |
10 |
Repeating Cruise?
(within same year) |
No |
Interval: |
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# of Cruises: |
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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: |
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Short Description of Op Area
for use in schedules: |
NC slope |
Description of Op Area: |
Bodie island seeps |
Op Area Size/Dia.: |
100 |
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Lat/Long |
Marsden Grid |
Navy Op Area |
Beginning
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36.2° N
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74.783333° W
map
36° 12' N
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74° 46.99998' W
map
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Ending
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36.2° N
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74.783333° W
map
36° 12' N
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74° 46.99998' W
map
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Show Degrees Minutes |
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Foreign Clearance Required? |
No |
Coastal States:
NONE |
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 |
Lewes, DE, USA |
None |
Lewes, DE, 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: |
Chris Martens, UNC_CH |
# in Science Party |
12 |
# of different science teams |
1 |
# Marine Technicians to be
provided by ship operator:
(include in science party total)
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1 |
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 |
0 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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