Woods Hole Oceanographic Institution

Cruise Planning Synopsis


AT30-02

Ship

R/V Atlantis

Cruise Party

Craig Lee: Chief Scientist, Principal Investigator
Applied Physics Laboratory, University of Washington 1013 NE 40th St Seattle, WA USA 98105-6698
+1 206 685 7656
craig@apl.washington.edu

Departure: Sep 6, 2015

Nuuk, Greenland

Arrival: Sep 25, 2015

Nuuk, Greenland

Operations Area

Northern Labrador Sea to Southern Baffin Bay
Lat/Lon:
Depth Range: 50 / 3000
Will the vessel be operating within 200 NM of a foreign country? Canada, Greenland
Are visas or special travel documents required? no

Science Objectives

As part of a coordinated international effort to quantify (and eventually monitor) the variability of fluxes connecting the Arctic and Atlantic Oceans and to understand the role played by the Arctic and sub-Arctic in steering decadal scale climate variability, an integrated observing system will provide year-round measurements of volume, liquid freshwater and ice fluxes across Davis Strait. Fluxes through the Strait represent the net integrated Canadian Archipelago throughflow, modified by terrestrial inputs and oceanic processes during its southward transit through Baffin Bay. By the time they reach Davis Strait, Arctic waters already embody most of the transformations they undergo prior to exerting their influence on the deepwater formation sites in the Labrador Sea. This makes the Strait an ideal site for monitoring temporal and spatial variability in the critical upstream boundary condition for Labrador Sea convection. Measurements at Davis Strait will be used to study how fluctuations in the Arctic freshwater system modulate deep water formation to the south, thus influencing the associated meridional overturning circulation (MOC).

Science Activities

  1. Service mooring array (15 elements deplyed across Davis Strait).
  2. Conduct exrensive hydrographic survey extending from the nothern Laborador Sea into southern Baffin Bay
  3. Marine mammal observations
  4. (tentative) Deploy long-range glider at Davis Strait

Additional Info

Pre-cruise Planning Meeting: Teleconference
Meeting Notes: Will be at WHOI 20-21 July for OCB meeting. Could come by during that period.

Stations:

Supporting documentation:

»Atlantis_Working_Deck_Plan_C_Lee_ver_2.pdf
»Pre-Cruise_Meeting_Agenda_Craig_Lee_AT30-02.pdf
»2015_Davis_Strait_UVIC_Science_Req_and_planning.docx
»Multinet_2.JPG
»Multinet.pdf
»Multinet.JPG
»DS2015_MSR_Charts.pdf

Funding

Funding Agency: NSF
Grant or contract number: ARC-1022472

Scientific Instrumentation for R/V Atlantis

Shipboard Equipment

Bathymetry System 12 kHz
ADCP 75 kHz
Deionized Water System
Science Underway Seawater System
Navigation - Heading
Multibeam
Fume Hood
Navigation - Position

Shipboard Communication

Basic Internet access via HiSeasNet

CTD/Water Sampling

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

Critical CTD Sensors

MET Sensors

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

Sample Storage

Freezer -70°C 25 cu. ft.
Freezer -70°C 3.2 cu. ft. ea.
Refrigerator 8.6 cu. ft.
Scientific Walk-in Freezer
Storage Notes: Dewars (2@40L, 1@18L) will need to be stored prior to cruise {on AT30-01}.  Can not be stored in walk-ins.

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

CTD Winch with .322" Electro-mechanical wire
Mooring / TSE winch
Winch Notes: .322 winch for CTD's and Multinet (~10 deployments).

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

Portable Vans

Chemical Storage Van

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: Univ. of Victoria MULTINET:  Using the .322 wire and stbd Crane for launch and recovery.
  • Multinet dimensions are 33”X38” height of 33” for the box and 23” diameter X 44” in height for the Cod end section. 
  • Weight Top part is around 200pounds while the Cod-end section is around 150. 

Special Requirements

Elecrical Power: no Identify 
Equipment Handling: no Identify: 
Inter/intraship Communications: no Identify: 
Science Stowage: yes Identify: transport of science gear to and from WHOI on a not-to-interfere basis with the Weller cruise.
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:
LI primary battteries (moored instruments, gliders)


Radioactive Material

Radioiosotopes:yes

Additional Information

Is night time work anticipated on this cruise?yes
Specialized tech support (Seabeam, coring, other):
Other required equipment and special needs:

Checklist & Notes

Checklist

U.S. Customs Form: yes
Diplomatic Clearance: yes
Date Submitted: Apr 30, 2015
Date Approved:
Agent Information:
Countries:
Greenland (Demark).
Notes:
US 4455's due to Eric Benway by July 31st.
Isotope Use Approval: yes
Isotope Notes:

Regarding Radioactive Material - Steve Punshon Unv Vic:
"The source is in an electron capture detector in a GC.  It is a permanently sealed source and completely safe, as opposed to open sources, and poses no radiation risk in a regular lab environment.  I will be the only person authorised to operate the instrument.  The GC requires a 20 amp outlet (one of the live/neutral pins is rotated 90 degrees from the normal vertical orientation) and has a relatively short cord, about 6 ft." SP
SCUBA Diving: no

Checklist

SSSG Tech:
Dave Sims, Tina Thomas
C. Lee gear to be in Woods Hole week of July 20 - 24.  Loading July 29
Unv. Victoria gear loading on Aug 3.
Need to hire shore crane for all loading, shifting container and anchors in Nuuk and off load at WHOI.