Ship Request

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  Underway N2 Fix.  -  2017  -  Atlantic Explorer  
  Project Information  
Principal Investigator: Nicolas Cassar, Duke Project Institution: Duke
Project ID: 103944 Version #: 1
Date Submitted: 6/14/2013 10:56:00 AM Created By: Nicolas Cassar
Date Last Modified: 3/21/2014 12:38:00 PM URI Serial #: None
Funding Agencies: NSF/OCE/CO - 1350710 - Funded
Summary of Field Work: Ship testing of the proposed method will be conducted on a total of 3 cruises. Through a DUNCOC grant (Duke/University of North Carolina Oceanographic Consortium), the PI had received funding for a 5-day cruise in the second half of Yr 1 in the original submission. Now that the R/V Cape Hatteras has been retired, the PI requests funding through NSF for ship time on the R/V Atlantic Explorer in Yrs 2-4 onboard the R/V Atlantic Explorer in the Sargasso Sea, an oceanic region suited for testing of the proposed method. To the best of our knowledge, our results would represent the first report of underway oceanic N2 fixation measurements. We will compare these estimates with independent estimates of N2-fixation rates using the GC-FID approach. The cruise track has been chosen to cover a large gradient in potential N2 fixation rates. The August cruise date is based on the study of Orcutt et al. (2001) which shows that N2 fixation rates peak at the end of the summer at the Bermuda Ocean Time-Series (BATS).
Summary of Facility Requirements: Underway seawater access and CTD measurements along the cruise track from Bermuda to the Sargasso Sea.
Summary of other requirements and comments:  
Ship Request Identification
Type of Request: Primary Ship Use Request Status: Submitted
Request ID: 1006307 Created By: Nicolas Cassar
Date Last Modified: 6/14/2013 10:56:00 AM Date Submitted: 6/14/2013 10:56:00 AM
Requested Ship, Operating Days and Dates
Year: 2017 Ship/Facility: Atlantic Explorer
Optimum Start Date: 8/6/2017 Dates to Avoid: Summer cruise only, as N2 fixation is maximized during summer
Earliest Start Date: 6/15/2017 Multi-Ship Op: No
Latest Start Date: 8/31/2017 Other Ship(s): PLEASE NOTE: This work was originally planned on R/V Cape Hatteras, which is now retired.

Operating Days Needed: Science Days Mob Days De-Mob Days Estimated Transit Days Total Days
10 0 0 0 10
Repeating Cruise?
(within same year)
No Interval:   # of Cruises:  

Description of Repeating cruise requirements:
Justification/Explanation for ship choice, dates,
conflicts, number of days & multi-ship operations:
Work Area for Cruise
Short Description of Op Area
for use in schedules:
Sargasso Sea
Description of Op Area: Transect from Bermuda to Sargasso Sea
Op Area Size/Dia.: 600
  Lat/Long Marsden Grid Navy Op Area
32.3° N / 64.7833° W map
115 map
NA06 map
36.1167° N / 69.5833° W map
115 map
NA06 map
  Show Degrees Minutes    
Foreign Clearance and Permitting Requirements
Foreign Clearance Required? No Coastal States:
 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.)
Port Calls
Requested Start Port Intermediate Port(s) Requested End Port
St. George's, Bermuda None St. George's, Bermuda
Explanation/justification for requested
ports and dates of intermediate stops
or to list additional port stops
Short deployments on R/V Atlantic explorer offer several benefits: 1) The Sargasso Sea, one of the prime regions where oceanic N2 fixation (“hotspot”) has profound influence on the region’s biogeochemistry (Fig. 7) (Gruber 2004, Capone et al. 2005), is easily accessible from the home port of the R/V Atlantic Explorer in Bermuda. 2) The Bermuda Institute of Ocean Sciences, with its cutting-edge facilities, will be available for tuning and marine trials of the method prior to the cruise.

 Important Info on Working in Foreign Ports

Science Party
Chief Scientist: Nicolas Cassar, Duke
# in Science Party 18 # of different science teams 1 # Marine Technicians to be
provided by ship operator:
(include in science party total)
Explanation of Science Party Requirements and Technician Requirements Scientist party will consist of graduate students, technicians, and science educators who will use Skype to reach remote students.

Underway uncontaminated seawater lines will be used, and some CTD stations.
Instrumentation Requirements That Impact Scheduling Decisions
Unselected Dynamic PositioningUnselected ADCPUnselected MultibeamUnselected Seismic
Unselected Dredging/Coring/Large Dia. Trawl WireUnselected Stern A-frameUnselected Fiber Optic (.681)Unselected 0.680 Coax Wire
Unselected SCUBA DivingUnselected Radioisotope use - briefly describeUnselected NO Radioisotope use/Natural level workUnselected Other Operator Provided Inst. - Describe
0 PI-Provided Vans - briefly describe Unselected MOCNESS  
Explain Instrumentation or Capability
requirements that could affect choice
of ship in scheduling.

Underway uncontaminated seawater lines will be used, and some CTD stations.

Stable isotope 15N incubations will be performed.

Major Ancillary Facilities (that require coordination of schedules with ship schedule)
Unselected Helicopter Ops (USCG)Unselected Twin OtterUnselected Unmanned Aerial Systems (UAS) 
Autonomous Underwater Vehicle (AUV)
Unselected Other AUVUnselected Sentry  
Coring Facility
Unselected Jumbo Piston CoringUnselected Large Gravity Core Unselected MC800 multicorer w/ MISO camera/telemetryUnselected OSU Coring Facility (MARSSAM)
Unselected Other Large Coring FacilityUnselected WHOI Long Core  
Human Occupied Vehicle (HOV)
Unselected AlvinUnselected Clelia (HBOI)Unselected JSL I & II (HBOI)Unselected Other HOV
Other Facility
Unselected MISO Facility - deep-sea imagingUnselected Other FacilityUnselected Potential Fields Pool Equipment 
Remotely Operated Vehicle (ROV)
Unselected JasonUnselected Other ROV  
Seismic Facility
Unselected Ocean Bottom Seismograph Instrument Center (OBSIC)Unselected Ocean Bottom Seismograph Instrument Pool (OBSIP)Unselected Ocean-Bottom Seismometer Program (UTIG)Unselected Other Seismic/OBS Facility
Unselected PASSCALUnselected Portable MCS groupUnselected Portable MCS/SCS groupUnselected U.S. Geological Survey Ocean Bottom Seismometer Facility (USGS at WHOI)
Towed Underwater Vehicle
Unselected ARGO IIUnselected Hawaii MR1 (HMRG)Unselected IMI12 (HMRG)Unselected IMI120 (HMRG - formerly DSL 120A)
Unselected IMI30 (HMRG)Unselected Other Towed Underwater VehicleUnselected Towfish 
UNOLS Van Pool
Unselected AUV Lab Van #1Unselected Clean Lab VanUnselected Cold Lab VanUnselected General Purpose Lab Van
Unselected Radioisotope Lab VanUnselected Wet Lab Van  
UNOLS Winch Pool
Unselected Mooring SpoolerUnselected Portable WinchUnselected Turn Table 
Explain Major Ancillary Facilities
Requirements and list description
and provider for "other" systems.
Underway uncontaminated seawater lines will be used, and some CTD stations.

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