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sediment DOC
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2013
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New Horizon
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Project Title: |
Dissolved organic carbon (DOC) transformations in deep sub-surface sediments and its role as a source of "old" DOC to the water column |
Project Status: |
Submitted |
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Principal Investigator: |
Tomoko Komada, SFSU |
Project Institution: |
SFSU |
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Project ID: |
103011 |
Version #: |
3 |
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Date Submitted: |
8/11/2011 3:05:00 PM |
Created By: |
Tomoko Komada |
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Date Last Modified: |
9/14/2012 3:33:00 PM |
URI Serial #: |
None |
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Funding Agencies: |
NSF/OCE/CO - 1240645 - Funded |
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Summary of Field Work: |
We propose to collect sediment cores from two locations: center of the Santa Barbara Basin (SBB) and center of the Santa Monica Basin (SMB) in July 2012 (Yr-1) and July 2013 (Yr-2). At both locations, we will collect surface sediments (0-50 cm) using a multi corer. We will also collect longer cores (up to 4 m) using a gravity corer in SBB , and a piston corer and/or Kasten corer in SMB. The need for a piston corer and Kasten corer for SMB arises from the fact that there are sandy turbidites at this location which is difficult/impossible to penetrate with a gravity corer (a reconnaissance survey conducted in 2012 in the SMB using a gravity corer confirmed the inadequacy of gravity corer for this site).
As the cores come on deck, they will be processed (extruded, sliced, then centrifuged or squeezed) right away to collect porewater samples and solid phase samples. Most of this work will be done in a refrigerated van. Gravity/piston/Kasten cores will first be processed on deck (cut into shorter segments; collect sediment plugs, etc) prior to porewater extraction. Most samples will be preserved for later analyses, but a subset of them will be analyzed on ship.
We will also collect surface- and bottom-water samples using a Go-Flo bottle.
Key analytes are as follows: dissolved organic carbon (DOC), methane, DIC, sulfate, nutrients, some major ions; natural 14C and 13C of DOC, methane, DIC. |
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Summary of Facility Requirements: |
CORING AND WATER COLUMN SAMPLING: A multicorer that will allow recovery of “intact” sediment-water interfaces for high-resolution porewater sampling. A gravity corer that will give us at least 2m-long cores from SBB. A standard piston corer and possibly a Kasten corer that will give us >3m-long cores from SMB. CTD and Niskin bottles. We will also deploy our own Go-Flo bottle.
CORE PROCESSING: We need sufficient deck space to handle the gravity cores and piston cores, and to cut them into manageable pieces. We need a refrigerated van to: (1) store multi-cores and sections of gravity/piston/Kasten cores, and (2) extrude the cores in an N2 atmosphere. We also need lab space for methane collection, and for general sample processing (centrifugation, filtration, some analyses including GC, titration). A torch will also be used in the lab. We expect at least 10 compressed gas tanks to be on board. |
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Summary of other requirements and comments: |
A major purpose of our work is to determine natural 14C signatures of dissolved- and solid-phase carbon in these sediments, including DOC which is notorious for its susceptibility to contamination. It is therefore critical that we have a “clean” working environment with minimal potential for 14C and organic carbon contamination. We will need to use a research vessel that has been swabbed for 14C, and refrigerated vans that have not been used for isotope tracers. |
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Type of Request: |
Primary Ship Use |
Request Status: |
Submitted |
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Request ID: |
1004828 |
Created By: |
Tomoko Komada |
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Date Last Modified: |
9/14/2012 3:33:00 PM |
Date Submitted: |
8/11/2011 3:05:00 PM |
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Year: |
2013
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Ship/Facility: |
New Horizon
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Optimum Start Date:
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7/20/2013 |
Dates to Avoid: |
All PIs have academic appointments and teaching responsibilities. May is impossible because school is in session; fall semester starts late Aug. June is very difficult, because we will not have sufficient time to prepare for the the cruise while spring semester is in session. Early July creates conflicts for 2 co-PIs. |
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Earliest Start Date: |
7/20/2013 |
Multi-Ship Op: |
No |
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Latest Start Date: |
8/7/2013 |
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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7 |
2 |
1 |
2 |
12 |
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: |
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Short Description of Op Area
for use in schedules: |
CA Borderland |
| Description of Op Area: |
Santa Monica Basin and Santa Barbara Basin |
| Op Area Size/Dia.: |
one station per basin |
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Lat/Long |
Marsden Grid |
Navy Op Area |
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Beginning
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33° 22.8' N
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118° 27.6' W
map
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Ending
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34° 7.8' N
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119° 35.4' W
map
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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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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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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 |
This port is closest to our area of investigation. Moss Landing is not a viable option, because the Pt. Sur can not accommodate the cold van required for our work. |
Important Info on Working in Foreign Ports
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Chief Scientist: |
Tomoko Komada, SFSU |
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# in Science Party |
12 |
# of different science teams |
3 |
# 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 |
Each science team will be responsible for a particular set of tasks, including coring, core slicing, and porewater collection. 2-4 individuals will be needed per science team to accomplish this. One Res-Tech from SIO is requested to assist us with general shipboard operations. In addition, we request a coring specialist (along with coring gear) from Oregon State University to assist us with piston-, Kasten-, gravity-coring. |
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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. |
We request a multicorer, a gravity corer (3 m tube length), a standard piston corer (>=3m), and a Kasten corer (>=3 m). In Aug 2012, we conducted a reconnaissance survey of our Santa Monica Basin site using a gravity corer and found that it does not penetrate deep enough for us to collect the sulfate-methane transition (SMT) zone. There is record of successful pore-water collection through the SMT from this site using a piston core (EW9504-07PC). We have also been informed by OSU coring specialist that a Kasten corer might also work. We would hence like to request both.
An isotope-free refrigerated van is requested to process the cores at in situ temperature.
We will also need a hydro winch with 0.25" wire for Go-Flo casts.
We will be collecting DOC samples for natural 14C, hence the ship and van must be swabbed prior to the cruise.
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Explain Major Ancillary Facilities
Requirements and list description
and provider for "other" systems. |
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