Woods Hole Oceanographic Institution

Cruise Planning Synopsis


AR46-01 OOI Irminger & OSNAP

Ship

RV Neil Armstrong

Cruise Party

Sebastien Bigorre: Chief Scientist
Woods Hole Oceanographic Institution Clark 210A, MS#29 Woods Hole, Ma. USA 02543
+1 508 289 2686
sbigorre@whoi.edu

Heather Furey: Principal Investigator
Woods Hole Oceanographic Institution Clark 324A, MS#21 Woods Hole, Ma. USA 02543
+1 508 289 2916
hfurey@whoi.edu

Departure: May 22, 2020

Woods Hole

Arrival: Jun 21, 2020

Galway

Operations Area

Irminger Sea southeast of Greenland
Lat/Lon: 60° 0.0′ N / 40° 0.0′ W
Depth Range: 0 / 3500
Will the vessel be operating within 200 NM of a foreign country? yes - Greenland
Are visas or special travel documents required? no

Science Objectives

Five days will be devoted to the recovery and re-deployment of 4 (NSF) Overturning of Subpolar North Atlantic (OSNAP) moorings and, if time, complete a CTD array near the mooring sites, locations TBD. The OSNAP moorings monitor the velocity, temperature and salinity of the boundary current between ~37.8-41.1 W, 59.6-59.9N.  The OSNAP moorings include 1 tall mooring with its uppermost instrument at 42 m, and 3 shorter moorings with their uppermost instruments between 950 and 1455 m. Approximately 60 microcats (30 to be deployed, and 30 recovered) will be calibrated by means of 'caldips' (detailed below).  CTD/Rosette casts will be made at all mooring locations, and will follow the OOI protocal.

Science Activities

OSNAP Science Activities, not necessarily in time-order, recovery will occur before deployment:

1. For the 30 microcat instruments to be deployed, perform 3 calibration dips:

  1. Place 10 microcats on the rosette frame struts, lower over the side. 
  2. Take concurrent CTD and microcat measurements, 12 different depths, ranging through the water column, and to 3000 meters depth.  Wait 10 minutes at each bottle stop. 

2. In-water test of 8 acoustic releases:

  1. ~2 releases will be attached to rosette during ~4 CTD casts.
  2. Test release by sending release command when release is below 2000 m depth.

3. For each of the 4 moorings to be deployed:

  1.  
    1. Perform a CTD/Rosette cast.
    2. Deploy the mooring.
    3. Perform an anchor survey for the deployed mooring.

4. For each of the 4 moorings to be recovered:

  1.  
    1. Signal to acoustic release, send release command.
    2. Recover mooring.

5. For the 30 microcat instruments to be recovered, perform 3 calibration dips:

  1. Place ~10 microcats on the rosette frame struts, lower over the side. 
  2. Take concurrent CTD and microcat measurements, 12 different depths, ranging through the water column, and to 3000 meters depth.  Wait 10 minutes at each bottle stop.

5. Complete CTD section by performing CTD/Rosette cast al locations TBD, but near the OOI work area, as time permits.

Additional Info

Pre-cruise Planning Meeting: Visit WHOI
Meeting Notes: Between 1/21-1/27/20 or 2/3 - 2/14/20, please. I am on work travel 1/28-1/31 and 2/17-2/21.

Stations:

  OSNAP Mooring 4
  Distance: null
  Days: null
  Latitude: 59° 40.637’ N
  Longitude: 38° 34.121’ W

  OSNAP Mooring 3
  Distance: null
  Days: null
  Latitude: 59° 49.021’ N
  Longitude: 40° 16.71’ W

  OSNAP Mooring 2
  Distance: null
  Days: null
  Latitude: 59° 51.417’ N
  Longitude: 40° 41.741’ W

  OSNAP Mooring 1
  Distance: null
  Days: null
  Latitude: 59° 54.154’ N
  Longitude: 41° 6.762’ W

Supporting documentation:

»OSNAP_GDWBC_M1_asDeployedJune2018.pdf
»OSNAP_GDWBC_M2_asDeployedJune2018.pdf
»OSNAP_GDWBC_M3_asDeployedJune2018.pdf
»OSNAP_GDWBC_M4_asDeployedJune2018.pdf
»GDWBCarray_2020plans.pdf
»OSNAP_GDWBC_ArraySection2020.pdf

Funding

Funding Agency: NSF
Grant or contract number: 856363

Scientific Instrumentation for R/V Armstrong

Shipboard Equipment

Bathymetry System 12 kHz
A-Frame
12 kHz Pinger for Wire Use
EM122 (12 kHz) Multibeam Echosounder
Plotters
Crane
Shipboard Equipment Notes: Salinmeter, standards and bottles are OOI supplied.  

Shipboard Communication

Basic Internet access via HiSeasNet
Shipboard Communication Notes: No special communication needs.

CTD/Water Sampling

SBE43 oxygen sensor
911+ Rosette 24-position, 10-liter bottle Rosette with dual T/C sensors

Critical CTD Sensors

MET Sensors

Barometric Pressure
Air temperature
Precipitation
Relative Humidity
Wind speed and direction
Short Wave Solar Radiation
Long Wave Solar Radiation
Storage Notes:

Navigation

Will you be using Long Base Line (LBL) navigation? no
How many nets? null
How many tansponders? null
Will you be using Ultra-short baseline (USBL) navigation?no

Navigation

GPS
Navigation Notes:

Winches

Other Portable Winch
UNOLS Winch Pool
Winch Notes: OSNAP GDWBC work will use OOI winch system.  OOI will bring self-spooling LEBUS winch and OOI will reserve a TSE winch spooler from  from east coast winch pool (Brian Guest).  Winch Power needs: 440V/100 amps. 

Wire use and application

CTD Winch with .322" Electro-mechanical wire
Winch Notes:

Standard Oceanographic Cables

Slip ring required? no
Non-standard wire required? no
Traction winch required? no

Specialized Deck Equipment

Mooring Deployment/Recovery Equipment Required: no Type: 
Cruise Specific Science Winch Required: no Type: 
Nets Required: no Type: 

Over the Side Equipment

Will you be bringing any equipment (winches, blocks, etc.) that lowers instruments over the side? yes
Details: OOI will supply winches, blocks, hooks, tuggers and extra poles for mooring ops.

Special Requirements

Elecrical Power: no Identify 
Equipment Handling: no Identify: 
Inter/intraship Communications: no Identify: 
Science Stowage: no Identify: 
Water: no Identify: 

Additional Cruise Items/Activities

Explosive Devices:no
Portable Air Compressors:no
Flammable Gases:no
Small Boat Operations:yes
SCUBA Diving Operations:no

Hazardous Material

Will hazardous material be utilized?yes
Describe deployment method and quantity:
Lithium batteries for microcats and nortek current meters.

Radioactive Material

Radioiosotopes:no

Additional Information

Is night time work anticipated on this cruise?yes
Specialized tech support (Seabeam, coring, other):
Expect all over the side mooring ops to done in day light. CTD work may be done at night. Calibration dips for the microcat instruments may be done at night.
Other required equipment and special needs:

Checklist & Notes

Checklist

U.S. Customs Form: no
Diplomatic Clearance: no
Date Submitted:
Date Approved:
Agent Information:
Countries:
Notes:
Isotope Use Approval: no
Isotope Notes:
SCUBA Diving: no

Checklist

SSSG Tech: