|
|
Cascadia Gas Hydrate
-
2014
-
Thomas G. Thompson
|
|
|
|
Project Title: |
Characterizing the Response of the Cascadia Margin Gas Hydrate Reservoir to Bottom Water Warming Along the Upper Continental Slope |
Project Status: |
Submitted |
|
Principal Investigator: |
Evan A. Solomon, UW |
Project Institution: |
UW |
|
Project ID: |
104119 |
Version #: |
1 |
|
Date Submitted: |
10/24/2013 8:07:00 PM |
Created By: |
Evan A. Solomon |
|
Date Last Modified: |
10/24/2013 8:07:00 PM |
URI Serial #: |
None |
|
Funding Agencies: |
DOE - DOE/DE-FE0013998 - Funded
INST/UW - NONE - To Be Submitted |
|
Summary of Field Work: |
We will conduct a systematic geophysical and geochemical survey of methane seepage along the upper continental slope of the WA margin. Currently we plan for an eight-day field program using the R/V Thompson. The survey will be anchored by the bubble plume imaged and sampled at the feather-edge of the gas hydrate stability field in January 2013 (called the Fisherman's plume at 47 55.84 N, 125 38.23 W). The expedition will consist of an EM302 multi-beam survey of bubble plumes along the feather-edge of gas hydrate stability that is defined by the thermal models and a BSR map to test if seepage is widespread and to quantify the methane flux into the water column. At the Fisherman’s Plume and another plume imaged in our EM302 survey, we would collect both pore fluid samples via piston and/or gravity core and a grid of water column samples via CTD/rosette in the bubble plume and downstream of the bubble plume for geochemical analyses appropriate for (1) fingerprinting gas hydrate dissociation as a source of the methane emitted (Cl, d18O, dD, d13C-CH4, minor element concentrations and isotope ratios, and noble gas ratios) and (2) tracing the source, sinks, and flux of methane in the sediment and water column. The cores at the seep sites will constrain methane dynamics within the sediments, and the data from CTD casts downstream of the plumes will quantify the methane oxidized in the water column and residual flux of methane to the atmosphere. |
|
Summary of Facility Requirements: |
EM302 multibeam, require mid-water column dongle
3.5 kHz echosounder
ADCP
meteorological data
CTD/rosette
Gravity and piston core |
|
Summary of other requirements and comments: |
|
|
|
Type of Request: |
Primary Ship Use |
Request Status: |
Submitted |
|
Request ID: |
1006585 |
Created By: |
Evan A. Solomon |
|
Date Last Modified: |
10/24/2013 8:07:00 PM |
Date Submitted: |
10/24/2013 8:07:00 PM |
|
|
Year: |
2014
|
Ship/Facility: |
Thomas G. Thompson
|
|
Optimum Start Date:
|
10/10/2014 |
Dates to Avoid: |
|
|
|
|
|
|
|
Earliest Start Date: |
8/1/2014 |
Multi-Ship Op: |
No |
|
Latest Start Date: |
10/20/2014 |
Other Ship(s): |
|
|
|
Operating Days Needed: |
Science Days |
Mob Days |
De-Mob Days |
Estimated Transit Days |
Total Days |
|
8 |
0 |
0 |
0 |
8 |
Repeating Cruise?
(within same year) |
No |
Interval: |
|
# of Cruises: |
|
|
|
Description of Repeating cruise requirements: |
|
Justification/Explanation for ship choice, dates,
conflicts, number of days & multi-ship operations: |
|
|
Short Description of Op Area
for use in schedules: |
WA Slope |
| Description of Op Area: |
We will be conducting a geophysical/geochemical survey (transect) targeting the 500 m isobath along the upper continental slope of the WA margin. The survey will run from the northern tip of WA to about 47 deg N |
| Op Area Size/Dia.: |
about 5 nmi wide x 60 nmi long |
|
|
| |
Lat/Long |
Marsden Grid |
Navy Op Area |
|
Beginning
|
48° 0' N
/
124° 45' W
map
|
|
|
|
Ending
|
47° 0' N
/
125° 48' W
map
|
|
|
| |
Show Degrees Minutes |
|
|
|
|
|
Foreign Clearance Required? |
No |
Coastal States:
|
 Important Info on Foreign Research Clearances
|
|
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)?
|
No |
If yes, have you applied for the necessary permits through your export control office?
|
No |
| Questions about ITAR/EAR regulations?
|
Comments about foreign clearance requirements or
description of any other special permitting requirements
(e.g., MMPA, ESA, IHA, Marine Sanctuaries, etc.) |
|
|
|
Requested Start Port |
Intermediate Port(s) |
Requested End Port |
|
Seattle, WA, USA |
None |
Seattle, WA, USA |
Explanation/justification for requested
ports and dates of intermediate stops
or to list additional port stops |
Start port would be University of Washington and end port would be University of Washington |
Important Info on Working in Foreign Ports
|
|
|
|
Chief Scientist: |
Evan A. Solomon, UW |
|
# in Science Party |
25 |
# of different science teams |
1 |
# Marine Technicians to be
provided by ship operator:
(include in science party total)
|
3 |
|
Explanation of Science Party Requirements and Technician Requirements |
We will require technicians to run the EM302 and 3.5 kHz, ADCP, and to assist with over-the-side operations |
|
 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 | | |
|
Explain Instrumentation or Capability
requirements that could affect choice
of ship in scheduling. |
|
|
|
|
Explain Major Ancillary Facilities
Requirements and list description
and provider for "other" systems. |
|
|
