JP2019

Ship

RV Neil Armstrong

Vehicles

Cruise Party

Mara Freilich: Chief Scientist
Organization Name US
+1 617 452 3989
maraf@mit.edu

Glen Gawarkiewicz: Chief Scientist, Principal Investigator
Woods Hole Oceanographic Institution Clark 343C, MS#21 Woods Hole, Ma. USA 02543
+1 508 289 2913
ggawarkiewicz@whoi.edu

Astrid Pacini: Chief Scientist
Woods Hole Oceanographic Institution Clark 355A, MS#21 Woods Hole, Ma. USA 02543
+1 508 289 2917
apacini@whoi.edu

Departure: Woods Hole, MA on Sep 20, 2019

Arrival: Woods Hole, MA on Sep 22, 2019

Mobilization Date: Sep 20, 2019

Demobilization Date: Sep 22, 2019

Supporting documentation:

»ar38_stationplan.pdf

Operations Area:

Lat/Lon: 40° 30.0′ N / 70° 49.2′ W

Depth Range: 35 / 3000

Will the vessel be operating within 200 NM of a foreign country? no
Are visas or special travel documents required? no

Science objectives

The goal will be to teach new Joint Program students at sea sampling techniques. The science objective is to do a transect out to the shelf break south of Martha's Vineyard to characterize the hydrography and the plankton size structure of the southern New England shelf, including the shelf-break front. After the transect, we hope to do some adaptive sampling of a warm core ring or Gulf stream meander by sampling outside the feature (shelf side), at the edge of the feature, and within the feature. Any extra time will be devoted to along shelf sampling.

Science Activities

The science activities will include CTD casts and plankton tows (bongo net) at each of the stations. The plan will be for the CTD to be lowered to 5 m from the bottom. Multiple bottles will be fired at the bottom of the cast, the deep chlorophyll maximum, and the surface for nutrient and chlorophyll samples. Bongo tows will occur after the CTD cast, in which a plankton net with two 60-cm diameter openings will be towed for 5 minutes to 5 m from the bottom or 200 m, whichever is
less.
We plan to look at the shipboard ADCP data between stations (transiting at 10 knots) until we approach the shelf break front, in which we hope to alternate between traveling at 10 knots and 7 knots between stations to look at ADCP data and EK80 data, respectively.

Once offshore, the plan is to look for an oceanographic feature, such as a Gulf Stream meander or warm core ring. We plan to do a CTD cast, bongo tow, and a mesopelagic tow outside, on the edge, and within this feature. The plan for the mesopelagic tow is a single oblique tow to 1000 m with a 10 m^2 net attached to net bars with a rope. It will be functionally similar to a tucker trawl.

Pre-cruise planning meeting: Visit WHOI

Scheduled for August 29, 1400 in Smith conference room

Stations:

Funding Agency: TBD #TBD

- added TBD #TBD on Aug 15, 2019 2:01 PM by Astrid Pacini

R/V Armstrong

Shipboard Equipment

Bathymetry System 12 kHz
ADCP 300 kHz
Sippican XBT System (Mark 21)
Bathymetry System 3.5 kHz
ADCP 150 kHz
A-Frame
Deionized Water System
Science Underway Seawater System
12 kHz Pinger for Wire Use
Fume Hood
EM122 (12 kHz) Multibeam Echosounder
EK80 Sonar
Dynamic Positioning System
Incubation Area
Plotters
ADCP 38 kHz
Crane
EM710 MkII (40 to 100 kHz) Multibeam Echosounder


Shipboard Equipment Notes:

We will also be bringing a plankton net (standard 60 cm bongo) and a 10m^2 net with net bars. It uses a MOCNESS net but is not a MOCNESS. It operates like a tucker trawl in that the net is collapsable.

Shipboard Communication

Basic Internet access via HiSeasNet


Shipboard Communication Notes:

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

Critical CTD Sensors: 

Hydrographic Analysis Equipment

Salinometer

MET Sensors

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

Sample Storage

Freezer -70°C 25 cu. ft.


Storage Notes: We will be freezing small numbers of mesopelagic fish at -70.

Navigation

GPS

Navigation Notes:


Winch Notes:

Wire use and application

CTD Winch with .322" Electro-mechanical wire
Trawl Winch with 9/16th trawl wire
3/8" Hydro Wire


Wire Notes:

We will be towing a bongo net that weighs 150 lbs in air (~100 lbs in water) with the 9/16th trawl wire to 200 m. It will not contain water (filters plankton). We expect 100-200 lbs of tension on the wire. This net can be towed astern.

We will also be towing a 10m^2 tucker trawl net that weighs 300 lbs in air (~200 lbs in water) to 1000 m using the 9/16th trawl wire. It will not contain water (fishing net). We expect 500-1000 lbs of tension on the wire. This net can be towed astern.

 

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

Radioactive Material

Radioiosotopes: no

Additional Information

Is night time work anticipated on this cruise? yes

Specialized tech support (Seabeam, coring, other):  Tech support with setting up the EK80 will be needed.

Other required equipment and special needs: 
Date Submitted: Aug 23, 2019 2:57 PM by Astrid Pacini