The Next 'Line W'

Ship

R/V Knorr

Vehicles

Cruise Party

John Toole: Chief Scientist, Principal Investigator
Woods Hole Oceanographic Institution Clark 337, MS#21 Woods Hole, Ma. USA 02543
+1 508 289 2531
jtoole@whoi.edu

Departure: Woods Hole, MA on May 1, 2014

Arrival: Woods Hole, MA on May 12, 2014

Mobilization Date: Apr 29, 2014

Demobilization Date: May 13, 2014

Supporting documentation:

Operations Area: West Atlantic

Lat/Lon: 40° 18.0′ N / 70° 6.0′ W

Depth Range: 40 / 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.

Pre-cruise planning meeting: Visit WHOI

Stations:

Funding Agency: NSF #1332667

- added NSF #1332667 on Mar 13, 2014 1:31 PM by Chad Smith

R/V Knorr

Shipboard Equipment

Bathymetry System 12 kHz
Bathymetry System 3.5 kHz
ADCP 75 kHz
Deionized Water System
Science Underway Seawater System
12 kHz Pinger for Wire Use

Shipboard Communication

Basic Internet access via HiSeasNet

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

Critical CTD Sensors: 

CTD-Related Equipment

Lowered Acoustic Doppler Current Profiler (LADCP)

Hydrographic Analysis Equipment

Oxygen Sample Bottles (available in 150 ml sizes)
Salinometer
Dissolved Oxygen Titration System (Brinkmann Titrator)
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

Sample Storage

Freezer -70°C 3.2 cu. ft. ea.


Storage Notes:

Navigation

Will you be using Long Base Line (LBL) navigation? no

Will you be using Doppler/GPS navigation? no

Navigation

GPS

Navigation Notes: Heading

Winches

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

Winch Notes:



Wire Notes:

Slip ring required? no	Number of conductors:
Non-standard wire required? no	Type:
Traction winch required? no	Describe:

Other Science Vans:

Other Science Vans:

Science Van 1
Type/size: 20' storage van for mooring stuff		Location: main deck
Water:		Power:

Specialized Deck Equipment

Mooring Deployment/Recovery Equipment Required: yes	Type: TSE , ship's crane, poles/hook
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: blocks for mooring work

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: 
Date Submitted: Mar 13, 2014 1:31 PM by Chad Smith