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Broad-banded waves
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2012
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Thomas G. Thompson
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Project Title: |
Spectral Energy Dissipation in Broad-banded Wave Fields |
Project Status: |
Submitted |
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Principal Investigator: |
James M. Thomson, UW_APL |
Project Institution: |
UW_APL |
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Project ID: |
102148 |
Version #: |
1 |
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Date Submitted: |
8/10/2009 6:46:00 PM |
Created By: |
James M. Thomson |
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Date Last Modified: |
9/17/2012 7:50:00 PM |
URI Serial #: |
None |
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Funding Agencies: |
NSF/OCE/PO - 0960778 - Funded |
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Summary of Field Work: |
Two field experiments are proposed to make simultaneous remote and in situ measurements of
energy dissipation rates in broad-banded wave fields. The experiments will expand incrementally
from prior results measuring of narrow-banded wave fields. During the winter of year 1, a 10-day
experiment on onboard the R/V Robertson (APL-UW) will be conducted in the Juan de Fuca
Strait, WA. Conditions are expected to be moderate (wave heights less than 2 m), and the goal will
be to test new measurement techniques prior to an open ocean experiment. The 10-day duration is
sufficient to cover a range of wave and weather conditions, based on data from NDBC station 46088.
During the autumn of year 3, a 20-day experiment onboard a UNOLS vessel will be conducted in
the North Pacific Ocean. The duration is necessary to observe a range of wave conditions, including
variations in wave age, which has a much larger range (0 to 10) in the open ocean than in semi-
enclosed bodies of water. Wave heights up to 5 m are targeted for this experiment. The R/V
Thompson at UW is requested to minimize shipping and logistical costs and shared ship time
will be possible.
Shipboard instrumentation from previous efforts on Lake Washington and Puget Sound will be
redeployed, including a visual camera and sonic wave gage and Dopbeam beam velocity profilers,
corrected for motion using a three-axis accelerometers. In addition, two new platforms, a wave-
following float and a 'helikite' aerostat, are proposed to support measurements in open ocean
conditions. The new platforms are necessary to capture the larger spatial scales of open ocean waves,
and have the added advantage of avoiding the hull-reflections common to shipboard measurements. |
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Summary of Facility Requirements: |
Shipboard video and met data via 10 m tower,
Regular deployment and recovery of small free drifting buoys, and
Regular deployment and recover of tethered 'helikite' aerostat. |
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Summary of other requirements and comments: |
Ability to modify route in realtime as wave conditions dictate. |
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Type of Request: |
Primary Ship Use |
Request Status: |
Submitted |
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Request ID: |
1003187 |
Created By: |
James M. Thomson |
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Date Last Modified: |
8/10/2009 6:46:00 PM |
Date Submitted: |
8/10/2009 6:46:00 PM |
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Year: |
2012
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Ship/Facility: |
Thomas G. Thompson
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Optimum Start Date:
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10/10/2012 |
Dates to Avoid: |
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Earliest Start Date: |
9/1/2012 |
Multi-Ship Op: |
No |
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Latest Start Date: |
11/10/2012 |
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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10 |
2 |
1 |
7 |
20 |
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: |
Thomas G. Thompson is requested to minimize mobilization/shipping costs, if Seattle port call is possible. Request could be changed to "collaborative" if other users can accommodate 10 days of surveying in a variety of wave conditions (including transit to find desired wave conditions). |
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Short Description of Op Area
for use in schedules: |
North Pacific |
| Description of Op Area: |
Offshore of WA and OR coasts |
| Op Area Size/Dia.: |
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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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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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Seattle, WA, USA |
None |
Seattle, WA, USA |
Explanation/justification for requested
ports and dates of intermediate stops
or to list additional port stops |
Seattle is request to minimized shipping and mobilization costs from the University of Washington Applied Physics Lab. |
Important Info on Working in Foreign Ports
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Chief Scientist: |
James M. Thomson, UW_APL |
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# in Science Party |
4 |
# 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 |
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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. |
1) 10-m lightweight tower for video/met data collection
2) Free drifting wave buoys for deployment and recovery on 6-12 hr missions
3) Tethered 'helikite' aerostat to be deployed and recovered from aft deck, as successfully done in aug 2008 from Thomas G Thompson.
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Explain Major Ancillary Facilities
Requirements and list description
and provider for "other" systems. |
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