Woods Hole Oceanographic Institution

Cruise Planning Synopsis


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AR35-03: NISKINE Process

Ship

RV Neil Armstrong

Cruise Party

James Girton: Principal Investigator
Applied Physics Laboratory, University of Washington
+1 206 543 6785
girton@uw.edu

Jason Gobat: Principal Investigator
Applied Physics Laboratory, University of Washington 1013 NE 40th St Seattle, WA USA 98105-6698
+1 206 543 2439
jgobat@apl.washington.edu

Ben Jokinen: Principal Investigator
Applied Physics Laboratory, University of Washington
+1 206 685 2800
bjokinen@uw.edu

Craig Lee: Chief Scientist
Applied Physics Laboratory, University of Washington 1013 NE 40th St Seattle, WA USA 98105
+1 206 685 7656
craiglee@uw.edu

Luc Rainville: Principal Investigator
Applied Physics Laboratory, University of Washington
+1 206 685 4058
lucrain@uw.edu

Avery Snyder: Principal Investigator
Applied Physics Laboratory, University of Washington
+1 206 543 7279
asnyder@apl.washington.edu

Leif Thomas: Principal Investigator
Stanford University
+1 650 721 1140
leift@stanford.edu

Caitln Whalen: Principal Investigator
Applied Physics Laboratory, University of Washington
+1 206 685 1505
cwhalen@apl.uw.edu

Departure: May 27, 2019

Reykjavik, Iceland

Arrival: Jun 20, 2019

Reykjavik, Iceland

Operations Area

Subpolar North Atlantic, south of Iceland, east of the Reykjanes Ridge
Lat/Lon:
Depth Range: min / max (m)
Will the vessel be operating within 200 NM of a foreign country? Iceland
Are visas or special travel documents required? no

Science Objectives

  • Investigate how meso- and submesoscale variability, and the resulting vorticity fields,  modulate the generation and propagation of near-inertial internal waves.
  • Understand the dynamics that govern the partition between generation of high-wavenumber near-inertial internal waves, which drive local mixing, and low-wavenumber waves, which propagate away from generation sites.

Science Activities

Operations will focus on the interactions between near-inertial waves and meso- and submeso-scale fronts and eddies. Our study area will be with the box defined by: 58N, 28W; 61 N, 28W, 61 N, 23 W; 58 N, 23 W. We will use satellite remote sensing and data from glider pre-deployed into the area to direct Armstrong to promising features with this box. Targeting will then be refined through surveys using our Triaxus towed, undulating profiler. Autonomous assets (drifters, floats and gliders) will be deployed into the target feature, after which we will resume synoptic surveys of the feature, now following the autonomous array. We will provide situational awareness to keep the bridge appraised of instrument positions, as Armstrong will need to navigate within the field of autonomous instruments. Surveys will continue until autonomous assets begin to disperse too widely for easy recovery, or the inertial wave field evolves past being of interest. At this point, we will recover autonomies instruments, select a new target feature, and repeat the process. For members of the Armstrong crew who participated in the wintertime LATMX program, conducted along the north wall of the Gulf Stream from the R’Vs Knorr and Atlantis, this cruise will follow a similar pattern.

Operations and Instruments include:
  1. Deploy and recover (3) Seagliders and (1) Deepglider (possibly repeated several times)
  2. Recover (1) Deepglider and (1) Slocum glider
  3. Repeated deployment and recovery of (15) EM-APEX floats. (6) of these will remain in the water after Armstrong departs.
  4. Deploy drifters: (3) SVP, (10) SVP-B, (5) MiniMet, (10) DWS, (4) ADOS
  5. Deploy and recover (1) Super-ADOS and Wirewalkers (number TBD)
  6. Deploy and recover (1) Liquid Robotics Waveglider
  7. Synoptic surveys using Triaxus undulating towed profiler (using APL-UW Dynacon winch)
  8. Surveys with Ocean Sciences Underway CTD and SIO EPSI-fish

Additional Info

Pre-cruise Planning Meeting: Teleconference
Meeting Notes: Will visit if possible- perhaps overlap with UNOLS functions.

Stations:

Supporting documentation:

»NISKINE2019_ArmstrongProspectus.pdf

Funding

Funding Agency: ONR/NAVY
Grant or contract number: N00014-18-1-2780

Scientific Instrumentation for R/V Armstrong

Other Science Vans:

Shipboard Equipment

Bathymetry System 12 kHz
ADCP 150 kHz
A-Frame
Science Underway Seawater System
EK80 Sonar
Dynamic Positioning System
WAMOS
ADCP 38 kHz
Crane
Shipboard Equipment Notes: We will bring our own Dynacon winch for the Triaxius system. This winch has been used previously on R/V Knorr, R/V Revelle and R/V Melville.

Shipboard Communication

Basic Internet access via HiSeasNet
Shipboard Communication Notes: We will need to transfer remote sensing imagery (images and, occasionally, data) from shore to ship. We may also need ssh access from ship to shore to allow for glider piloting.

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

MET Sensors

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

Navigation

GPS
Navigation Notes:

Winches

Other Portable Winch
Winch Notes: We will bring our own Dynacon winch for the Triaxius system. This winch has been used previously on R/V Knorr, R/V Revelle and R/V Melville.

Dynacon model 10030
Line pull 3500 lbs
Winch certs attached
Deck mount drawings attached. Minimum safety factor is 2.7 ovef cable break.
3-phase, 440V power required 

EPSI-fish winch TBD 

Winch Notes: Triaxus operates from a 10mm electro-optical armored cable.
Rochester A305382http://www.rochestercables.com/pdfs/DataLines/EOP/A305382.pdf
Breaking strength 16000 lbs
The Triaxus tow body is attached to the cable through a weak link sized at 5000 lbs
We pull test the cable prior to every operation, and will pull test resutls.

The OceanSciences UCTD operates from light-weight spectra line (similar to fishing line).

EPSI-fish details will be supplied by the SIO team.

Standard Oceanographic Cables

Slip ring required? no
Non-standard wire required? no
Traction winch required? no
Science Van 1
Type/size: 20' van for storage Location: TBD
Water: no Power:no
Science Van 2
Type/size: 10' van for Triaxus tow body Location: TBD
Water: no Power:no

Special Requirements

Elecrical Power: yes Identify 3-phase for Dynacon winch
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?yesDescribe deployment method and quantity:
LI primary batteris in instruments.

Radioactive Material

Radioiosotopes:no

Additional Information

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