|
|
Repeat Hydro/CO2
-
2019
-
Global
|
|
|
|
Project Title: |
Collaborative Research: Global Ocean Repeat Hydrography, Carbon, and Tracer Measurements, 2015-2020 |
Project Status: |
Submitted |
|
Principal Investigator: |
James Swift, SIO |
Project Institution: |
SIO |
|
Project ID: |
104256 |
Version #: |
7 |
|
Date Submitted: |
2/13/2014 6:59:00 PM |
Created By: |
James Swift |
|
Date Last Modified: |
9/7/2018 2:38:00 PM |
URI Serial #: |
None |
|
Funding Agencies: |
NSF/OCE/PO - 1437015 - Funded |
|
Summary of Field Work: |
year Line leader days at sea start port end port
2015 P16_1 NOAA 68-71 (2 leg total) Papeete Honolulu
2015 P16_2 NOAA 68-71 (2 leg total) Honolulu Kodiak
2015 ARC01 UNOLS 5 days added to GEOTRACES Dutch Harbor Dutch Harbor
2016 P18_1 NOAA 75-80 (2 leg total) San Diego Easter Island
2016 P18_2 NOAA 75-80 (2 leg total) Easter Island Punta Arenas
2016 I08S UNOLS 38 Fremantle Fremantle
2016 I09N UNOLS 41 Fremantle Phuket
2016 I01E UNOLS 14 Phuket Columbo
2017 P06_1 UNOLS 42 Sydney Papeete
2017 P06_2 UNOLS 37 Papeete Valparaiso
2018 S04P +P16S & P18S to shelf UNOLS 67 Hobart Punta Arenas
2018 I07N NOAA 43 Durban Goa
2019 I05 UNOLS 55 Cape Town Fremantle
2019 I06S UNOLS 40 Cape Town Capetown
2020 A13.5 NOAA 42 Cape Town Takoradi (Ghana)
We plan to carry out trans-oceanic sections of reference-quality surface-to-bottom measurements of temperature, salinity, dissolved oxygen, nutrients, CFCs, carbon system parameters, and other tracers along the tracks of previously-occupied sections, chiefly from the WOCE era, so that the WOCE, CLIVAR, and new data can be compared.
This work is part of a systematic and global re-occupation of select hydrographic sections being carried out to quantify changes in storage and transport of heat, fresh water, carbon dioxide (CO2) and related parameters. By integrating the scientific needs of the carbon and hydrography/tracer communities, major synergies and cost savings are achieved.
The work consists of boundary-to-boundary sections of full-depth stations at nominal 30-nmile spacing in basin interiors (closer at boundaries and over bathymetric features) with one deployment per station of a CTDO/rosette system with 36 10-liter bottles and LADCP. The ship's standard underway ssytems including meteorology, surface seawater T/S/O2/pCO2/etc., centerline depth to bottom, navigation, hull-mounted ADCP, etc. are also used.
Argo float deployments are routinely done.
Program water column measurements include CTDO, salinity, oxygen, nutrients, CFCs, ocean carbon parameters, and various tracers.
Requests for ancillary sampling are commonly received in the year (or more) ahead of each cruise. |
|
Summary of Facility Requirements: |
CTD winch (and spare CTD winch; or spare drum if replaceable at sea on main winch); must be able to level wind the wire used; must be suitable for conducting cable; modern slip-rings in good condition; read-outs for winch speed, tension, and wire out (prefer slave/remote read-outs also available in CTD lab); control of winch payout and recovery speed steady in range 0.1 - 1.0 meters/second (10-60 meters/minute), with smooth low-speed "inching" during deployment and recovery;
sheaves: adequate diameter and construction for UNOLS 0.322" CTD cable; guard to keep cable from jumping sheave when wire goes slack; anti-icing if used in icing conditions;
wire: UNOLS 0.322" CTD cables required on main CTD winch and spare; prefer 10,000 meters wire, but require at least 1000m more wire than depth of deepest cast; wire history available; lubricant/dressing history and chemical composition available if CFCs or trace organics are to be measured;
Will use nearly all lab space on UNOLS Global-class ship plus at least one lab van and 1-3 storage vans. No radioisotope use - in fact, ship must be swab-tested to be "clean" for 14C and tritium.
Some cruises use 50 or more standard compressed gas cylinders.
Normal ship's underway systems, including pCO2, used on all program cruises. |
|
Summary of other requirements and comments: |
Swift assists logistics coordination for UNOLS, USCG, and USAP cruises for the program. Swift will hand off cruise planning to the chief scientist for each cruise. The chief scientist is selected by the science oversight committee (chairs: L. Talley and R. Feely) ca. one year ahead of each cruise.
Ports listed are commonly-used ports convenient to the ends of the transects. Other ports can be used, but may change total days at sea for a given cruise.
It is common for the program to receive requests for additional sampling, sometimes requiring extra ship time, ahead of a given cruise. NSF has asked that, whenever possible, such requests be made a year ahead of a given cruise so that agency consideration can be given to the overall costs of the extra days.
Shipboard complement for the core program is about 24 persons, not including foreign observers (if required), resident technicians, or personnel from add-on ancillary programs (typically 1-12 extra persons for ancillary prorgams).
There is confusion regarding the definitions of terms on the UNOLS ship time request forms in terms of days requested. Due to complicated loading, each cruise requires 4 days on in-port loading (except for 102 cruises with multi-day transits to the first station, in which case 3 full days of loading may be sufficient). Each cruise also requires 2 days in port at the end of the cruise for unloading, except when the final stations are very close to port, in which case an extra day in port is required to analyze the final samples from sea.
The Arctic cruise for the program in 2015 was established by agreement with US GEOTRACES to slightly enhance their approved-for-funding 2015 Arctic Ocean cruise on USCGC Healy by adding 5 extra days to their 58 day request (total now 63 days at sea), 6 extra techs, 24 extra stations, and 2 lab vans (or equivalent lab space). So our ship-time request here is only for the 5 extra days. |
|
|
Type of Request: |
Primary Ship Use |
Request Status: |
Submitted |
|
Request ID: |
1006845 |
Created By: |
James Swift |
|
Date Last Modified: |
9/7/2018 2:38:00 PM |
Date Submitted: |
2/13/2014 6:59:00 PM |
|
|
Year: |
2019
|
Ship/Facility: |
Global
|
|
Optimum Start Date:
|
2/4/2019 |
Dates to Avoid: |
This is the I06S ship-time request.
The main issue regarding dates is to be at the southern end of the line near the time of the local sea ice minimum (mid-February). The line can be run in either direction, but with a slight preference to run north to south. |
|
|
|
|
|
|
Earliest Start Date: |
1/1/2019 |
Multi-Ship Op: |
No |
|
Latest Start Date: |
2/20/2019 |
Other Ship(s): |
N/A |
|
|
Operating Days Needed: |
Science Days |
Mob Days |
De-Mob Days |
Estimated Transit Days |
Total Days |
|
40 |
4 |
2 |
0 |
46 |
Repeating Cruise?
(within same year) |
No |
Interval: |
|
# of Cruises: |
|
|
|
Description of Repeating cruise requirements: |
The 40 days is for 40 UNOLS days at sea (not counting any port days). Four full days of loading are required at the start port. If the final station is very close to the end port, it is possible that an extra in-port day could be required too analyze the final seawater samples on board. |
Justification/Explanation for ship choice, dates,
conflicts, number of days & multi-ship operations: |
Global class ship required.
Actual science days (40) is the number of UNOLS days at sea required, based on the requested ports, not including any port time.
The cruise can be run in either direction. |
|
Short Description of Op Area
for use in schedules: |
South Indian |
| Description of Op Area: |
This is the I06S cruise.
This is a transect across the Antarctic Circumpolar Current between South Africa and the Antarctic continental shelf. To reach the shelf break with a global-class ship, the southern end should be reached at the time of the local sea ice minimum |
| Op Area Size/Dia.: |
2200 |
|
|
| |
Lat/Long |
Marsden Grid |
Navy Op Area |
|
Beginning
|
|
|
|
|
Ending
|
68° 36' S
/
33° 42' E
map
|
|
|
| |
Show Degrees Minutes |
|
|
|
|
|
Foreign Clearance Required? |
Yes |
Coastal States:
South Africa |
 Important Info on Foreign Research Clearances
|
|
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)?
|
No |
If yes, have you applied for the necessary permits through your export control office?
|
No |
| Questions about ITAR/EAR regulations?
|
Comments about foreign clearance requirements or
description of any other special permitting requirements
(e.g., MMPA, ESA, IHA, Marine Sanctuaries, etc.) |
EEZ clearance from South Africa is needed. We plan to carry out some of our CTD stations and to operate standard underway systems in South African waters.) |
|
|
Requested Start Port |
Intermediate Port(s) |
Requested End Port |
|
Cape Town, South Africa |
None |
Cape Town, South Africa |
Explanation/justification for requested
ports and dates of intermediate stops
or to list additional port stops |
Cruise can be run in either direction. Can used Durban as a start and/or end port, but prefer CapeTown. |
Important Info on Working in Foreign Ports
|
|
|
|
Chief Scientist: |
James Swift, SIO |
|
# in Science Party |
28 |
# of different science teams |
1 |
# Marine Technicians to be
provided by ship operator:
(include in science party total)
|
2 |
|
Explanation of Science Party Requirements and Technician Requirements |
We expect at least 24 in the main science party plus two res techs, for 26 total. Ancillary programs not yet proposed will likely increase science party size by at least a few persons. On some UNOLS cruises we have had as many as 38 aboard (including res techs) in the science party. |
|
 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 |
| 3 PI-Provided Vans - briefly describe | MOCNESS | | |
|
Explain Instrumentation or Capability
requirements that could affect choice
of ship in scheduling. |
Multibeam is used only in "raw" mode to inspect bathymetry along track and near stations. Centerline depth to bottom is, however, required along track and at stations. Dynamic positioning is used to hold station position and maintain wire safety. There is usually one lab van and 1-2 storage vans for this program. Ship must be swab-tested to verify lack of contamination for 14C and tritium.
|
|
|
|
Explain Major Ancillary Facilities
Requirements and list description
and provider for "other" systems. |
Normally we use a PMEL-supplied lab van for the DIC measurements. There will be 1-2 science-supplied storage vans as well. |
|
