Processes of Exchange at Cape Hatteras

Ship

RV Neil Armstrong

Vehicles

Cruise Party

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

Departure: Woods Hole on Jan 8, 2018

Arrival: Woods Hole on Jan 21, 2018

Mobilization Date: Jan 7, 2018

Demobilization Date: Jan 22, 2018

Supporting documentation:

»PEACH_--_Operational_Dive_Plan_for_B1_and_B2_with_WHOI--_FINAL_--_2017-10-26.docx
»Muglia_dive_letter_of_recriprocity.pdf
»Matthias_letter_of_reciprocity.pdf
»Haines_reciprosity.pdf
»MooringTurnArounds.docx
»HydrographicOperations.docx

Operations Area: General vicinity of Cape Hatteras

Lat/Lon: 35° 30.0′ N / 75° 0.0′ W

Depth Range: 10 / 4000

Will the vessel be operating within 200 NM of a foreign country? no

Science objectives

The PEACH project will identify the processes that control the exchange of waters between the shelves along the eastern seaboard of the US (Middle Atlantic Bight and Southern Atlantic Bight) and the open ocean. The processes will be investigated to determine the dominant forcing mechanisms (e.g., Gulf Stream, atmosphere, buoyancy). The understanding of shelf-deep ocean exchange gained through PEACH will be applicable to other regions where shelf and basin-scale currents converge. The detailed examination of shelf response made possible by the sampling scheme, the dynamical understanding achieved by a coupled observation-model exploration of dynamics, and the simulation skill developed over the wide seasonal and interannual variation in forcing will transform our capacity to anticipate the response of the coastal ocean to forecasted climatic evolution of forcing in the coming decades.

Science Activities

Steam cross-shelf to Pioneer Array, then transit directly to study area near Cape Hatteras.

At the study-site (exact order of operations is strongly weather dependent) turn around moorings and conduct a CTD cast at each site.

-       Turn around 2 met-moorings (at sites B1 and B2) in 30 m of water. During each turn around, a small boat may be required so the techs can climb on the mooring to re-connect the battery and set the antenna.

-       Turn around 5 ADCP moorings (at sites B1, B2, A1, A2, A3) in water depths ranging from 30 m to 100 m. If releases do not work for ADCPs near B1 and B2 dive operations may be necessary to recover instruments

-       Complete a bathymetric survey near Cape Hatteras that was half completed in April

-       Conduct high-horizontal resolution CTD transects across features of interest to be determined real-time via satellite info from SSH and SST as well as glider data (i.e. eddies, shelfbreak front).  This may extend into the transit home.

 

During the transit from the study-site home to Woods Hole

-       complete any CTD feature transects

-       Cross-shelf CTD section from Pioneer Array to 40 m isobath

Pre-cruise planning meeting: Visit WHOI

Media personnel on board: Writer
Possibility of a Journalist from The Economist coming along. He has been invited and expressed interest

Stations:

Funding Agency: NSF #OCE-1558521

- added NSF #OCE-1558521 on Nov 1, 2017 1:40 PM by
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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
Science Underway Seawater System
EM122 (12 kHz) Multibeam Echosounder
EK80 Sonar
Dynamic Positioning System
ADCP 38 kHz
Crane
EM710 MkII (40 to 100 kHz) Multibeam Echosounder


Shipboard Equipment Notes: Will be deploying a mooring at the 1500 m isobath. Will need TSE winch

Shipboard Communication

Basic Internet access via HiSeasNet
Is there a need to receive data from shore on a regular basis?
Is there a need to transfer data to shore on a regular basis?


Shipboard Communication Notes: Will need to get images of SST and SSH and small data files. No Skype or video conferencing. Journalist may need to send photos and text

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
Wet Labs FLNTURTD Combination Flourometer and Turbidity Sensor

Critical CTD Sensors: 

Hydrographic Analysis Equipment

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
Long Wave Solar Radiation


Storage Notes:

Navigation

GPS

Navigation Notes:

Winches

Other Portable Winch

Winch Notes: Will need TSE winch for mooring at 1500 m isobath



Wire Notes:

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: yes SCUBA Diving Operations: yes

Hazardous Material

Will hazardous material be utilized? no

Radioactive Material

Radioiosotopes: no

Additional Information

Is night time work anticipated on this cruise? yes

Specialized tech support (Seabeam, coring, other):  EK80 and multi-beam support would be very helpful

Other required equipment and special needs:  Possible diving operations will need to be supported
Date Submitted: Nov 3, 2017 3:43 PM