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DOC and gels
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2018
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Thomas G. Thompson
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Project Title: |
Collaborative proposal: DOC removal in the ocean according to gel theory. |
Project Status: |
Submitted |
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Principal Investigator: |
Monica V. Orellana, UW_APL |
Project Institution: |
UW_APL |
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Project ID: |
105173 |
Version #: |
1 |
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Date Submitted: |
2/10/2016 12:03:00 PM |
Created By: |
Monica V. Orellana |
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Date Last Modified: |
7/6/2016 4:40:00 PM |
URI Serial #: |
None |
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Funding Agencies: |
NSF/OCE/CO - 1634009 - Funded |
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Summary of Field Work: |
This research focuses on understanding the dynamics and bioreactivity of marine dissolved organic carbon (DOC). At 662 PgC, DOC is a massive carbon reservoir about which we know little mechanistically (Hansell et al. 2009). An important fraction of the DOC pool (10-30%) assembles to form a nutrient-rich pool of “microgels”, thereby converting dispersed recalcitrant DOC to a particulate form more directly accessible to the microbial loop. The goal of this proposal is to understand DOC/gel dynamics and bioreactivity in North Pacific waters, applying a gel conceptual framework as a predictive theory for assessing colloidal processes and controlling factors. The North Pacific contains the lowest DOC concentrations (35 µM) and oldest radiocarbon ages (up to 6000 y.o.) found in the open oceans, making it a suitable study region for investigating low bioreactivity. The deep waters of the region contain a large pool of RDOC, while the surface waters contain higher concentrations of more labile components and inherently greater variability. This work, including both lab study and field work along Line P, will validate polymer gel theory as a predictive tool to explain DOC bioreactivity and dynamics in the ocean by characterizing gel assembly kinetics and thermodynamics, their annealing and aggregation into larger particles, as well as the effects of volume phase transition phenomena with respect to changes in environmental parameters (pH, temperature). Our goal is to provide a mechanistic model to explain DOC polymer reactivity and distribution, their skewedness toward low molecular weight, and insights on why the refractory DOC pool is exemplified by aged, short chain molecules.
We request 12 days of ship time on August 2018 to occupy the Sub-Arctic North Pacific (LIne P). |
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Summary of Facility Requirements: |
Facility Requirements: We will need a CTD/rosette, cable to 4000m, space for incubation's on deck with running water, and laboratory space (wet and dry) for instrumentation. |
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Summary of other requirements and comments: |
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Type of Request: |
Primary Ship Use |
Request Status: |
Submitted |
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Request ID: |
1008315 |
Created By: |
Monica V. Orellana |
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Date Last Modified: |
2/10/2016 12:03:00 PM |
Date Submitted: |
2/10/2016 12:03:00 PM |
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Year: |
2018
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Ship/Facility: |
Thomas G. Thompson
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Optimum Start Date:
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8/1/2018 |
Dates to Avoid: |
earlier side of august 2018 |
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Earliest Start Date: |
8/1/2018 |
Multi-Ship Op: |
No |
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Latest Start Date: |
8/12/2018 |
Other Ship(s): |
none |
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Operating Days Needed: |
Science Days |
Mob Days |
De-Mob Days |
Estimated Transit Days |
Total Days |
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10 |
1 |
1 |
2 |
14 |
Repeating Cruise?
(within same year) |
No |
Interval: |
0 |
# of Cruises: |
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Description of Repeating cruise requirements: |
none |
Justification/Explanation for ship choice, dates,
conflicts, number of days & multi-ship operations: |
Thought Thompson would be best because it's UW, but will take another ship if needed. |
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Short Description of Op Area
for use in schedules: |
Line P |
| Description of Op Area: |
Gulf of Alaska, going to St Papa |
| Op Area Size/Dia.: |
1400 |
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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.) |
none |
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Requested Start Port |
Intermediate Port(s) |
Requested End Port |
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Seattle, WA, USA |
None, , None, |
Seattle, WA, USA |
Explanation/justification for requested
ports and dates of intermediate stops
or to list additional port stops |
none |
Important Info on Working in Foreign Ports
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Chief Scientist: |
Monica V. Orellana, UW_APL |
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# in Science Party |
8 |
# of different science teams |
1 |
# 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 |
CTD operation, tech needed to launch and bring on back on board |
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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. Small experiments with radioisotopes, not sure if van is needed, a laminar hood would be OK.
2. incubations on deck
3. will need freezers
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Explain Major Ancillary Facilities
Requirements and list description
and provider for "other" systems. |
none |
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