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Aleutian GPSA
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2020
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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: |
Collaborative Ship Use |
Request Status: |
Submitted |
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Request ID: |
1011263 |
Created By: |
Spahr C. Webb |
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Date Last Modified: |
9/9/2020 12:19:00 AM |
Date Submitted: |
9/9/2020 12:19:00 AM |
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Year: |
2020
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Ship/Facility: |
Sikuliaq
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Optimum Start Date:
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9/14/2020 |
Dates to Avoid: |
Add one day to transit leg on James Pickart leg and one day to transit on Robert Pickart leg |
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Earliest Start Date: |
9/14/2020 |
Multi-Ship Op: |
No |
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Latest Start Date: |
10/30/2020 |
Other Ship(s): |
Sikuliaq |
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Operating Days Needed: |
Science Days |
Mob Days |
De-Mob Days |
Estimated Transit Days |
Total Days |
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2 |
0 |
0 |
0 |
2 |
Repeating Cruise?
(within same year) |
No |
Interval: |
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# of Cruises: |
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Description of Repeating cruise requirements: |
adding days to existing cruises to deploy/recovery wavegliders for a roughly one month deployment. |
Justification/Explanation for ship choice, dates,
conflicts, number of days & multi-ship operations: |
Adding to currently scheduled cruises on the Sikuliaq |
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Short Description of Op Area
for use in schedules: |
Shumagin Island |
| Description of Op Area: |
near Shumagin Islands |
| Op Area Size/Dia.: |
300 |
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Lat/Long |
Marsden Grid |
Navy Op Area |
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Beginning
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Ending
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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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Yes |
| 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.) |
work is south of Alaska |
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Requested Start Port |
Intermediate Port(s) |
Requested End Port |
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Seward, AK, USA |
None |
Seward, AK, USA |
Explanation/justification for requested
ports and dates of intermediate stops
or to list additional port stops |
adding days to currently planned cruises |
Important Info on Working in Foreign Ports
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Chief Scientist: |
Scott L. Nooner, UNCW |
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# in Science Party |
1 |
# 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 |
The wavegliders will be deployed and recovered by the technicians on board the ship. |
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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. |
adding one day to two already planned cruises
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Explain Major Ancillary Facilities
Requirements and list description
and provider for "other" systems. |
none |
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