Woods Hole Oceanographic Institution

Cruise Planning Synopsis


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AT 17

Ship

R/V Atlantis

Cruise Party

Ruth Curry: Principal Investigator
Woods Hole Oceanographic Institution Clark 354, MS#21 Woods Hole, Ma. USA 02543
+1 508 289 2799
rcurry@whoi.edu

John Toole: Chief Scientist
Organization Name USA
+1 508 289 2531
jtoole@whoi.edu

Departure: Oct 9, 2010

Woods Hole

Arrival: Oct 24, 2010

Woods Hole

Operations Area

North West Atlantic
Lat/Lon: 40° 30.0′ N / 70° 12.0′ W
Depth Range: 0 / 5300
Will the vessel be operating within 200 NM of a foreign country? Bermuda
Are visas or special travel documents required? no

Science Objectives

Line W is one component of a long-term climate observing system that is positioned to quantify variability in the deep limb of the Atlantic meridional overturning circulation (MOC). The field program has been operating since 2004 and includes a 6-element array of instruments situated down the continental slope south of Woods Hole and is augmented by yearly occupations of a hydrographic section along this line extending toward Bermuda.  The moored array, which utilizes McLane profilers, current meters plus T/C sensors, is designed to quantify changes in DWBC / Gulf Stream water properties, stratification (potential vorticity) and transport. Shipboard observations using CTD, LADCP and discrete sampling for salinity, oxygen, CFCs, SF6 and I129 measure the water column properties at high spatial resolution to help verify that the array resolves interannual signals.  These measurements are key to clarifying the deep ocean response to variability in high-latitude air-sea exchanges and, ultimately, the ocean's role in global climate variability through changes in its transport of heat and freshwater.

Science Activities

Recover and deploy 6 subsurface moorings.
Conduct 26 CTD/rosette casts.
Test the High Resolution Profiler (HRP2) which includes deployment/recovery of this untethered free-falling instrument package.

Additional Info

Pre-cruise Planning Meeting: Visit WHOI
Meeting Notes: 9/18 Some combination of John, Ruth, and Scott Worrilow will attend the pre-cruise planning meeting
Media personnel on board: Video
To be determined (at this time). We were asked to save room for 1 or 2 media/outreach people, if possible.

Stations:

Supporting documentation:

»WM6_2008_Model_(1).pdf
»WM4P_2008_Model_(1).pdf
»HRP_operation_summary_montgomery.pdf
»LineW_stamap.jpg
»W_station_pos.txt
»HRP2_atsea.pdf

Funding

Funding Agency: NSF
Grant or contract number: OCE-0726720

Scientific Instrumentation for R/V Atlantis

Shipboard Equipment

Bathymetry System 12 kHz
Deionized Water System
Navigation - Heading
ADCP 75 kHz

CTD/Water Sampling

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

Critical CTD Sensors

CTD-Related Equipment

Lowered Acoustic Doppler Current Profiler (LADCP)

Hydrographic Analysis Equipment

Salinometer
Salt Bottles (2 cases of 125 ml provided)
Oxygen Sample Bottles (available in 150 ml sizes)

MET Sensors

Barometric Pressure
Wind speed and direction
Air temperature
Relative Humidity

Sample Storage

Freezer -70°C 3.2 cu. ft. ea.

Navigation

Will you be using Long Base Line (LBL) navigation? no
How many nets? 0
How many tansponders? 0
Will you be using Ultra-short baseline (USBL) navigation?no

Winches

Mooring / TSE winch
CTD Winch with .322" Electro-mechanical wire

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: The system for deploying/recovering HRP-II includes: a rolling cart on which the HRP-II is secured while on deck, track that is bolted to the deck, and a hydraulic lifting rig that pivots to move the lift point beyond the ship’s stern, so the HRP-II can be deployed and recovered without damage due to collisions with the ship (see supporting document HRP2_atsea.pdf).

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:

Radioactive Material

Radioiosotopes:no

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: no
Diplomatic Clearance: no
Date Submitted:
Date Approved:
Agent Information:
Countries:
Notes:
Isotope Use Approval: no
Isotope Notes:
SCUBA Diving: no

Checklist

SSSG Tech: