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SPURS-2 fresh lenses
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2017
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Thomas G. Thompson
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Project Title: |
Rain-formed fresh lenses in SPURS-2 |
Project Status: |
Submitted |
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Principal Investigator: |
Kyla Drushka, UW_APL |
Project Institution: |
UW_APL |
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Project ID: |
104534 |
Version #: |
10 |
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Date Submitted: |
8/12/2014 5:32:00 PM |
Created By: |
Kyla Drushka |
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Date Last Modified: |
7/21/2015 8:50:00 PM |
URI Serial #: |
None |
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Funding Agencies: |
NSF/OCE - 1458759 - Funded
NASA - NONE - Funded |
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Summary of Field Work: |
The goal of this work is to characterize small-scale upper ocean variability during heavy rain events. There will be two cruises during the rainy season (summer 2016, fall 2017) in the Eastern Tropical Pacific ITCZ (Intertropical Convergence Zone) around 10N, 125W. (An additional cruise will be carried out in February-March 2017; this will be submitted as a separate ship time request by another PI).
Ship-based measurements will involve surveys using a towed surface salinity profiler (SSP), towed CTD array, tethered balloon, ship-mounted CO2 laser, ship-mounted infrared camera, as well as deployment of a variety of AUVs, drifters, and floats. The surveys will also involve measurements with the shipboard ADCP, TSG, and meteorological system. Fieldwork will also include deployment and recovery of a mooring. |
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Summary of Facility Requirements: |
CTD winch; A-frame; deck crane; underway thermosalinograph; full meteorological package; salinometer; sufficient deck space for deployment and recovery of mooring, balloon, and tethered and autonomous assets. |
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Summary of other requirements and comments: |
SPURS-2 Field Campaign Statement of Work for UNOLS Ship Time
Update: 19 February, 2015
The second phase in the Salinity Processes in the Upper Ocean Regional Study (SPURS-2) will focus on the low-salinity region of the Eastern Tropical Pacific Ocean. A SPURS-2 white paper presents background and motivation for the study and outlines plans for a tropical modeling and field program (http://spurs.jpl.nasa.gov/SPURS).
The following NASA proposals have been awarded:
• Bill Asher (APL-UW): Towed Surface Salinity Profiler
• Fred Bingham (UNC): Data Management
• Luca Centurioni (Scripps): Drifters
• Carol Anne Clayson (WHOI): Air-Sea Fluxes
• Tom Farrar (WHOI): Moorings
• Ben Hodges (WHOI): Wave Gliders
• Zhijin Li (JPL): Modeling
• Luc Rainville (APL-UW): Seagliders
• Steve Riser (UW): Argo floats
• Julian Shanze (ESR): Sea Snake (towed flexible tube pumping to TSG)
• Andrey Shcherbina (APL-UW): Mixed Layer Lagrangian Floats
• Janet Sprintall (Scripps): Hydrography
The following NSF proposal has been awarded by Physical Oceanography:
• Kyla Drushka (APL-UW): Tethered balloon, CO2 laser, instrument boom off bow
The following NSF proposal was submitted 15 Feb 2015 to Physical Oceanography:
• Carol Anne Clayson (WHOI): Unmanned underwater vehicles
The following NSF proposal was submitted 22 Jan 2015 to the MRI program via Atmospheric Sciences:
• Steve Rutledge (CSU): Rain radar (fall 2017 cruise only)
The field component will include deployed assets for long term monitoring and intense ship-based measurements designed to resolve the short time and small spatial scales of rain events responsible for low surface salinity. The field campaign will take place over 14 months beginning in summer 2016, with ship time arranged in at least two cruises occurring roughly 14 months apart. The study site will be in the Eastern Tropical Pacific ITCZ (Intertropical Convergence Zone) in the region of 10ºN 125ºW. The first of these cruises will occur in summer 2016 and the second cruise will occur in fall 2017 in order to coincide with the rainy seasons. NASA has provided funding for the first 25 days of a cruise on the Thompson. NSF has pledged to support a second cruise. The possibility of a third cruise occurring in spring 2017 (in between the two cruises listed above) will depend on the results of the SPURS-2 Planning Meeting to take place at Scripps in March 2015. This third cruise may be on a non-UNOLS vessel.
Ship-based measurements will include surveys using towed surface and subsurface platforms, tethered balloons, underway profilers, and deployment of short term assets such as UUVs (Unmanned Underwater Vehicles) and free-drifting platforms. Both cruises will be used for ship-based measurements. In addition to ship-based measurements, the field campaign will include observations from moorings, underwater gliders, profiling and mixed-layer floats, surface wavegliders and drifters for the duration of the study. The first cruise will include asset deployment and the second cruise will include asset recovery.
The first choice of ships is the R/V Thompson because of its installation of two through-the-hull sensor ports located at 2 m and 3 m depth. These ports are currently instrumented with thermosalinographs that provide continuous underway measurements of temperature, salinity, and depth. The installation, instrumentation, and on-going operation of this underway system are funded by the NASA Physical Oceanography Program. The Thompson is currently scheduled for a mid-life overhaul beginning in May, 2016 that may take a year or more. The continuous underway near-surface sampling provided by these unique installations would significantly enhance the SPURS-2 science goals in ways that would not be possible with a different vessel. Therefore, we request that the overhaul be delayed until fall 2016 so the Thompson can be used for the first cruise. Securing the Thompson for the first cruise is desirable over planning to use her for the second cruise in order to avoid the possibility that the refit would not be finished in time (fall 2017).
The estimated number of scientist berths is 28 for the first cruise and 34 for the second cruise. Therefore, if a vessel other than the Thompson is assigned we request either the Revelle or the Atlantis. It is not expected that the same ship would be required for both cruises, but the Thompson would be ideal for both.
Assuming San Diego as the start port, the one-way transit time to the study region would be 5.7 days (1435 nm at 10.5 knots). A 36-day cruise would allow 21 science days on station.
Draft Schedule of Funded Cruises on UNOLS Vessels
Cruise 1 – summer, rainy season: 7/1/16 to 8/5/16
Cruise 2 – fall, rainy season: 9/1/17 to 10/6/17 |
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Type of Request: |
Primary Ship Use |
Request Status: |
Submitted |
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Request ID: |
1007652 |
Created By: |
Andrew T. Jessup |
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Date Last Modified: |
7/21/2015 8:50:00 PM |
Date Submitted: |
2/19/2015 5:38:00 PM |
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Year: |
2017
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Ship/Facility: |
Thomas G. Thompson
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Optimum Start Date:
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9/1/2017 |
Dates to Avoid: |
objective of cruise is to observe rain storms, so a cruise during the rainy season (July-Sept) is required. |
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Earliest Start Date: |
8/1/2017 |
Multi-Ship Op: |
No |
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Latest Start Date: |
10/1/2017 |
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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21 |
2 |
1 |
12 |
36 |
Repeating Cruise?
(within same year) |
Yes |
Interval: |
14 months |
# of Cruises: |
2 |
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Description of Repeating cruise requirements: |
SPURS-2 will need 2 cruises - one during the summer rainy season of 2016 and the other during the fall rainy season of 2017. With the requested first cruise start date of 1 Jul 2016, the repeat cruise would be 14 months later beginning 1 Sep 2017. |
Justification/Explanation for ship choice, dates,
conflicts, number of days & multi-ship operations: |
The goal of the experiment is to observe near-surface salinity variations, so the first choice of ship is the R/V Thompson, which has through-the-hull ports installed at 2 m and 3 m depth that are currently instrumented with thermosalinographs, and thus provide a profile of near-surface salinity. If the Thompson is not available, we request another UNOLS vessel large enough to accommodate science party of 28 on the first cruise and 34 on the second cruise along with numerous towed and autonomous platforms (e.g., Revelle or Atlantis). The same ship is not required for both cruises but the Thompson would be ideal for both. Please see discussion of potential conflict with the Thompson refit under "Summary of other requirements or comments" |
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Short Description of Op Area
for use in schedules: |
Pacific ITCZ |
| Description of Op Area: |
Eastern Pacific Intertropical Convergence Zone |
| Op Area Size/Dia.: |
50 |
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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:
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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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Yes |
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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San Diego, CA, USA |
None |
San Diego, CA, 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: |
Kyla Drushka, UW_APL |
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# in Science Party |
24 |
# of different science teams |
8 |
# Marine Technicians to be
provided by ship operator:
(include in science party total)
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2 |
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Explanation of Science Party Requirements and Technician Requirements |
Sciences teams funded by both NASA and NSF are expected to participate in the cruise. The number of science teams will depend on the proposals that are funded, but there will likely be 6-8 teams. |
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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. |
General purpose lab van is requested in order to mount the CO2 laser, which requires a surface that is (a) stable, and (b) high enough off the deck that the laser can be directed at the sea surface with zero risk of being intercepted by any object on the ship. A salinometer will also be required. |
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