Woods Hole Oceanographic Institution

Cruise Planning Synopsis


AR45: OSNAP West

Ship

RV Neil Armstrong

Cruise Party

Robert Pickart: Chief Scientist, Principal Investigator
Woods Hole Oceanographic Institution Clark 359B, MS#21 Woods Hole, Ma. USA 02543
+1 508 289 2858
rpickart@whoi.edu

Fiamma Straneo: Principal Investigator
Woods Hole Oceanographic Institution Clark 339, MS#21 Woods Hole, Ma. USA 02543
+1 508 289 2914
fstraneo@whoi.edu

Departure: Jun 23, 2020

Woods Hole, MA

Arrival: Aug 1, 2020

Woods Hole, MA

Operations Area

Southern Greenland
Lat/Lon: 59° 20.0′ N / 43° 50.0′ W
Depth Range: 100 / 3500
Will the vessel be operating within 200 NM of a foreign country? Greenland
Are visas or special travel documents required? no

Science Objectives

This research is part of the Overturning in the Subpolar North Atlantic Program (OSNAP), an effort to determine the strength of the meridional overturning circulation and associated heat and freshwater fluxes in the subpolar North Atlantic. It is a collaborative program with scientists from several nations, including the U.K., the Netherlands, Germany, France, Canada and China.

The specific objectives of this cruise are as follows:

1. To service 17 current meter moorings in the southeast Labrador Sea and southwest Irminger Sea.
2. To conduct a hydrographic/velocity survey in the vicinity of Cape Farewell and in Denmark Strait.

Science Activities

1. We will attempt to recover and re-deploy 17 moorings. There are two types of moorings: tall oceanographic moorings (9); shelf-tripods (8). Since the time at the study is reduced (due to the COVID-19 situation), it is likely that we won't be able to service all of the moorings.

2. We will occupy CTD stations at all of the mooring sites, and also occupy some additional sections as time permits.

3. We will collect underway data throughout the cruise (vessel-mounted ADCP, Knudsen, met sensors).

Additional Info

Pre-cruise Planning Meeting: Teleconference
Meeting Notes: Teleconference is necessary due to COVID-19

Stations:

Supporting documentation:

»OSNAP_Straneo_As_Deployed_2018.pdf
»OSNAP_Pickart_As_Deployed_2018.pdf
»basemap_ar45_planning.jpg
»ar30_mooring_table_2018.png

Funding

Funding Agency: NSF
Grant or contract number: OCE-1756361

Scientific Instrumentation for R/V Armstrong

Shipboard Equipment

Bathymetry System 12 kHz
ADCP 300 kHz
Bathymetry System 3.5 kHz
ADCP 150 kHz
A-Frame
Science Underway Seawater System
12 kHz Pinger for Wire Use
EM122 (12 kHz) Multibeam Echosounder
EK80 Sonar
Dynamic Positioning System
K-Synch System
Plotters
ADCP 38 kHz
Crane
EM710 MkII (40 to 100 kHz) Multibeam Echosounder

Shipboard Communication

Basic Internet access via HiSeasNet
Is there a need to receive data from shore on a regular basis?
Is there a need to transfer data to shore on a regular basis?
Shipboard Communication Notes: We need to transfer ADCP data to/from the ship because our ADCP tech is unable to sail.

CTD/Water Sampling

Wet Labs ECO-AFL fluorometer
Wet Labs C*Star transmissometer (660nm wavelength)
Seapoint STM turbidity sensor
SBE43 oxygen sensor
911+ Rosette 24-position, 10-liter bottle Rosette with dual T/C sensors
Biospherical underwater PAR (1000m depth limit) with reference Surface PAR
Wet Labs FLNTURTD Combination Flourometer and Turbidity Sensor

Critical CTD Sensors

We will attach 4 chipod sensors to the rosette. We need a complete backup CTD system.

Hydrographic Analysis Equipment

Salinometer
Salt Bottles (2 cases of 125 ml provided)

MET Sensors

Barometric Pressure
Air temperature
Precipitation
Relative Humidity
Wind speed and direction
Short Wave Solar Radiation
Long Wave Solar Radiation
Storage Notes: We will bring a spare CTD system (Marshall Swartz is taking care of this)

We will bring an oxygen titration system provided by the University of Rhode Island, plus oxygen sample bottles

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

Trawl Winch with 9/16th trawl wire
Winch Notes: We will bring a LEBUS mooring winch

Wire use and application

CTD Winch with .322" Electro-mechanical wire
Trawl Winch with 9/16th trawl wire
Winch Notes:

The trawl wire is necessary if we need to drag for any of the moorings.

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: We will bring a LEBUS winch and necessary blocks for the mooring work.

Special Requirements

Elecrical Power: no Identify 
Equipment Handling: yes Identify: Mooring Deployment
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:

Radioactive Material

Radioiosotopes:no

Additional Information

Is night time work anticipated on this cruise?yes
Specialized tech support (Seabeam, coring, other):

SSSG Techs should be capable of running the acoustics for this cruise.

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: