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Gradients 4
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2021
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Thomas G. Thompson
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Project Title: |
Gradients 4 |
Project Status: |
Submitted |
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Principal Investigator: |
E. Virginia Armbrust, UW |
Project Institution: |
UW |
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Project ID: |
106728 |
Version #: |
1 |
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Date Submitted: |
2/3/2020 9:44:00 PM |
Created By: |
E. Virginia Armbrust |
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Date Last Modified: |
2/3/2020 9:44:00 PM |
URI Serial #: |
None |
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Funding Agencies: |
OTHER - NONE - Funded |
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Summary of Field Work: |
Characterization of the biological and chemical features of transition zones between the North Pacific subtropical gyre and either the equatorial Pacific to the south or the suppolar gyre to the north. The cruise entails a transect of approximately 25 degrees to and from Hawaii along 158 degrees west. A series of underway instruments that tap into the seawater intake system will be used to define the exact location of sampling stations. Approximately 5 stations will be occupied for 24 hrs with depth profiles of the upper water column (approximately 1000m). |
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Summary of Facility Requirements: |
We will need a CTD/rosette, radioisotope van, trace metal van and trace metal clean CTD/rosette/line, flow cytometery van, ability to tow a trace metal clean pump while underway, sufficient deck space of on-deck flowing seawater incubators, underway CTD, A frame for deploying radiometer, and sufficient flow of the seawater intake to run multiple instruments simultaneously. |
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Summary of other requirements and comments: |
Whether the cruise transect is to the south or north from Hawaii will be determined over the coming year. |
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Type of Request: |
Primary Ship Use |
Request Status: |
Submitted |
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Request ID: |
1010844 |
Created By: |
E. Virginia Armbrust |
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Date Last Modified: |
2/3/2020 9:44:00 PM |
Date Submitted: |
2/3/2020 9:44:00 PM |
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Year: |
2021
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Ship/Facility: |
Thomas G. Thompson
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Optimum Start Date:
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10/1/2021 |
Dates to Avoid: |
We are flexible with timing to optimize our chances for use of the Thompson |
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Earliest Start Date: |
9/1/2021 |
Multi-Ship Op: |
No |
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Latest Start Date: |
6/30/2022 |
Other Ship(s): |
Thompson is first choice of ship. If Thompson not available during requested period, the Kilo Moana is our second choice |
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Operating Days Needed: |
Science Days |
Mob Days |
De-Mob Days |
Estimated Transit Days |
Total Days |
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28 |
1 |
1 |
0 |
30 |
Repeating Cruise?
(within same year) |
No |
Interval: |
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# of Cruises: |
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Description of Repeating cruise requirements: |
This is not a request for repeat cruises |
Justification/Explanation for ship choice, dates,
conflicts, number of days & multi-ship operations: |
This is the fourth of a series of cruises funded through the Simons Foundation We request the R/V Thompson because of the size of science party and the capabilities of Thompson. Scientists from 12 labs are part of the program and we now have funding for a 30 day cruise. Ten of the days are provided by the University of Washington for use with the Thompson. An essential component of the work is trace metal clean work where we tow a tow fish sampler, something that can easily be done (an has been done) from the Thompson. Also, we will be deploying/recovering seagliders, something also easier from the Thompson. On past cruises, we filled all available science berths and we are sure this would also happen with the Thompson.
We have tried to be as flexible as possible with timing to overlap with Thompson availability in the Pacific. The exact transect we follow is dependent on timing. If a winter time cruise, then we will go south towards the equator. If the timing is in spring, we will decide between a northward (towards the subpolar gyre as in past cruises) or southward towards the equator.
If the Thompson is not available, then our second choice is the Kilo Moana, which we used in 2019. |
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Short Description of Op Area
for use in schedules: |
North Pacific |
| Description of Op Area: |
The transect will cover ~25 degrees along 158 W if we go north or similar transect if we go equator-ward |
| Op Area Size/Dia.: |
1600 |
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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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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.) |
not applicable |
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Requested Start Port |
Intermediate Port(s) |
Requested End Port |
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Honolulu, HI, USA |
None |
Honolulu, HI, USA |
Explanation/justification for requested
ports and dates of intermediate stops
or to list additional port stops |
The optimum port is Honolulu. If ship scheduling necessitates, we could use San Diego and then would transit south. |
Important Info on Working in Foreign Ports
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Chief Scientist: |
E. Virginia Armbrust, UW |
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# in Science Party |
36 |
# of different science teams |
12 |
# 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 |
We request 2 marine technicians to allow 24 hour operations. Remaining berths would be for science personnel from the different lab groups. |
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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 |
| 2 PI-Provided Vans - briefly describe | MOCNESS | | |
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Explain Instrumentation or Capability
requirements that could affect choice
of ship in scheduling. |
We will use 3H and 14C for productivity measurements and so request a radio-isotope van. We also will use our trace metal clean van and may bing a flow cytometry van for a total of 3 potential vans.
We require CTD operations and will bring an underway CTD to be deployed while underway.
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Explain Major Ancillary Facilities
Requirements and list description
and provider for "other" systems. |
We will be using radio-isotopes and request a radio-isotope van. |
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