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Aleutian GPSA
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2022
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Sikuliaq
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Project Title: |
Collaborative Research: Measuring strain along the Aleutian subduction zone trench to better constrain seismic and tsunami hazard |
Project Status: |
Submitted |
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Principal Investigator: |
Spahr C. Webb, LDEO |
Project Institution: |
LDEO |
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Project ID: |
105412 |
Version #: |
4 |
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Date Submitted: |
8/4/2016 12:15:00 PM |
Created By: |
Spahr C. Webb |
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Date Last Modified: |
1/4/2021 9:03:00 PM |
URI Serial #: |
None |
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Funding Agencies: |
NSF/OCE/MGG - 1656413 - Funded |
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Summary of Field Work: |
We will deploy 9 transponders for GPSA measurements to measure strain accumulation at three sites south of the Aleutian Peninsula. A waveglider system will be used to survey the transponders on the seafloor. The transponders will be recovered two years later. We will deploy a waveglider twice to determine the exact position of the sites two years apart to measure the rate of strain accumulation across the Aleutian subduction zone to better constrain seismic tsunami risk. |
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Summary of Facility Requirements: |
We require several CTD casts and a crane to lift the transponders, waveglider and benchmarks over the side of the ship and to recover the transponders and waveglider at the end of the deployment. We require a multibeam sonar to place the transponders onto appropriate sea floor regions. |
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Summary of other requirements and comments: |
We originally specified the Sikuliaq because it is ported in Alaska, but any ship with crane, CTD and multibeam sonar would work.
The first year GPSA deployments can be done in conjunction with the Alaska OBS community experiment during the deployment leg for the LDEO OBSs by adding three days to this leg. This assumes the R/V Sally Ride or larger ship is used. |
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Type of Request: |
Primary Ship Use |
Request Status: |
Submitted |
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Request ID: |
1008759 |
Created By: |
Spahr C. Webb |
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Date Last Modified: |
1/4/2021 9:03:00 PM |
Date Submitted: |
8/4/2016 12:15:00 PM |
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Year: |
2022
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Ship/Facility: |
Sikuliaq
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Optimum Start Date:
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8/1/2022 |
Dates to Avoid: |
Cruise needs to be late enough in the summer season to permit a one month long waveglider deployment before the cruise in a good weather window. |
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Earliest Start Date: |
8/1/2022 |
Multi-Ship Op: |
No |
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Latest Start Date: |
9/10/2022 |
Other Ship(s): |
N/A |
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Operating Days Needed: |
Science Days |
Mob Days |
De-Mob Days |
Estimated Transit Days |
Total Days |
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3 |
1 |
1 |
3 |
8 |
Repeating Cruise?
(within same year) |
No |
Interval: |
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# of Cruises: |
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Description of Repeating cruise requirements: |
will be leaving transponders out until at least august 2022 |
Justification/Explanation for ship choice, dates,
conflicts, number of days & multi-ship operations: |
The ship will be used to recover a waveglider deployed roughly one month before the cruise to make the GPSA observations. The GPSA measurements require fairly good weather, so it is not possible to deploy the system too early in the summer. The ship will also recover nine transponders. |
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Short Description of Op Area
for use in schedules: |
SW Alaska |
| Description of Op Area: |
South of the Aleutian Peninsula west of the Sanak Islands and East of Kodiak |
| Op Area Size/Dia.: |
150 |
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Lat/Long |
Marsden Grid |
Navy Op Area |
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Beginning
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54° 42' N
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156° 30' W
map
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Ending
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54° 0' N
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160° 18' W
map
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Show Degrees Minutes |
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Foreign Clearance Required? |
No |
Coastal States:
US EEZ |
 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.) |
N/A |
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Requested Start Port |
Intermediate Port(s) |
Requested End Port |
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Kodiak, AK, USA |
None |
Kodiak, AK, USA |
Explanation/justification for requested
ports and dates of intermediate stops
or to list additional port stops |
Closest port with airport and good shipping. |
Important Info on Working in Foreign Ports
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Chief Scientist: |
Spahr C. Webb, LDEO |
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# in Science Party |
6 |
# of different science teams |
1 |
# 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 |
Science party consists of PI, students and engineers. Need a crane operator, multibeam, a few CTD casts |
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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. |
N/A
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Explain Major Ancillary Facilities
Requirements and list description
and provider for "other" systems. |
need crane and CTD |
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