AR46-01 OSNAP GDWBC

Ship

RV Neil Armstrong

Vehicles

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: Woods Hole on May 22, 2020

Arrival: Galway on Jun 21, 2020

Mobilization Date: May 19, 2020

Demobilization Date: Jun 22, 2020

Supporting documentation:

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

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. 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. 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.

Pre-cruise planning meeting: Visit WHOI

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

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

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

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

Funding Agency: NSF #856363

- added NSF #856363 on Jan 20, 2020 4:02 PM by
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R/V Armstrong

Shipboard Equipment

12 kHz Pinger for Wire Use
A-Frame
Bathymetry System 12 kHz
Crane
EM122 (12 kHz) Multibeam Echosounder
Plotters


Shipboard Equipment Notes: OOI will supply salinometer, standards, and bottles, and will complete the OSNAP water sampling work.

Shipboard Communication

Basic Internet access via HiSeasNet


Shipboard Communication Notes: No special communication needs.

CTD/Water Sampling

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

Critical CTD Sensors: 

MET Sensors

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


Storage Notes:

Navigation

GPS

Navigation Notes:

Winches

Other Portable Winch
UNOLS Winch Pool

Winch Notes: OSNAP mooring work will be completed by OOI mooring techs.  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


Wire Notes:

Slip ring required? no	Number of conductors:
Non-standard wire required? no	Type:
Traction winch required? no	Describe:

Other Science Vans:

Over the Side Equipment

Will you be bringing any equipment (winches, blocks, etc.) that lowers instruments over the side? no

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: no SCUBA Diving Operations: no

Hazardous Material

Will hazardous material be utilized? yes

Describe deployment method and quantity:
Lithium batteries for microcats and Norek current meters. (Dee Emrich to supply Hazmat inventory).

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: 
Date Submitted: Jan 22, 2020 11:31 AM