Woods Hole Oceanographic Institution
Cruise Planning Synopsis
AR23-02 Transit magnetometer | |
Ship | |
| RV Neil Armstrong | |
Cruise Party | |
| Mark Behn: Chief Scientist, Principal Investigator Woods Hole Oceanographic Institution Clark 260B, MS#22 Woods Hole, Ma. USA 02543 +1 508 289 3637 mbehn@whoi.edu Jean-Arthur Olive: Principal Investigator Lamont Doherty Earth Observatory 61 Route 9W P.O. BOX 1000 Palisades, NY USA 10964-8000 +1 845 365 8648 jaolive@ldeo.columbia.edu | |
| - added Mark Behn as Chief Scientist on Aug 21, 2017 12:37 PM by Elizabeth A. Caporelli | |
| - added Mark Behn as Principal Investigator on Aug 21, 2017 12:37 PM by Elizabeth A. Caporelli | |
| - added Jean-Arthur Olive as Principal Investigator on Aug 21, 2017 12:37 PM by Elizabeth A. Caporelli |
Departure: Oct 2, 2017 | |
| Ponta Delgada, Azores | |
Arrival: Oct 12, 2017 | |
| Woods Hole, MA | |
Operations Area | |
| Azores to Woods Hole | |
| - Azores to Woods Hole on Aug 21, 2017 12:37 PM by Elizabeth A. Caporelli | |
| Lat/Lon: 36° 0.0′ N / 34° 0.0′ W | |
| - set lat to 36° 0.0′ N, set lon to 34° 0.0′ W on Aug 21, 2017 12:37 PM by Elizabeth A. Caporelli | |
| Depth Range: 1200 / 5500 | |
| - set min to 1200, set max to 5500 on Aug 21, 2017 12:37 PM by Elizabeth A. Caporelli | |
| Will the vessel be operating within 200 NM of a foreign country? | No |
| - No on Aug 21, 2017 12:37 PM by Elizabeth A. Caporelli | |
| Are visas or special travel documents required? | no |
| - set to no on Aug 21, 2017 12:37 PM by Elizabeth A. Caporelli | |
Science Objectives | |
Fault generated abyssal hills are a primary morphologic feature of the ocean floor. Abyssal hills are created at the ridge axis and their formation is controlled by a combination of the rheologic properties of the lithosphere and magmatic processes in the crust. Ambient pressure in the Earth’s mantle caused by fluctuations in sea level can drive changes in melt production along the global mid-ocean ridge system. Several recent studies have proposed that these sea level-induced melting variations are expressed in abyssal hill fabric (e.g., their size and spacing)—and thus that seafloor bathymetry acts as a recorder of past sea level variability. However, the mechanism by which variations in melt production generate changes in abyssal hill morphology remains unclear. In particular, the mechanically-controlled spacing of abyssal hills is very similar to the spacing that would be predicted from orbitally-controlled sea level changes making it difficult to determine a cause-and-effect relationship. To investigate the relationships between faulting, magmatism, and sea level change we are conducting a 10-day research cruise on board the RV Neil Armstrong from the Azores to Woods Hole. The cruise will collect underway geophysical data (bathymetry, gravity, magnetics) to characterize variations in crustal thickness and lithospheric properties along a flow line that extends from the Mid-Atlantic Ridge to the US East Coast margin. The cruise is being conducted as part of a graduate student seminar within the MIT/WHOI Joint Program in Oceanography and will be led by the students taking the course. Processing of the data collected during the cruise will be performed by the students during the remainder of the fall semester.
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| - Fault generated abyssal hills are a primary morphologic feature of the ocean floor. Abyssal hills are created at the ridge axis and their formation is controlled by a combination of the rheologic properties of the lithosphere and magmatic processes in the crust. Ambient pressure in the Earth’s mantle caused by fluctuations in sea level can drive changes in melt production along the global mid-ocean ridge system. Several recent studies have proposed that these sea level-induced melting variations are expressed in abyssal hill fabric (e.g., their size and spacing)—and thus that seafloor bathymetry acts as a recorder of past sea level variability. However, the mechanism by which variations in melt production generate changes in abyssal hill morphology remains unclear. In particular, the mechanically-controlled spacing of abyssal hills is very similar to the spacing that would be predicted from orbitally-controlled sea level changes making it difficult to determine a cause-and-effect relationship. To investigate the relationships between faulting, magmatism, and sea level change we are conducting a 10-day research cruise on board the RV Neil Armstrong from the Azores to Woods Hole. The cruise will collect underway geophysical data (bathymetry, gravity, magnetics) to characterize variations in crustal thickness and lithospheric properties along a flow line that extends from the Mid-Atlantic Ridge to the US East Coast margin. The cruise is being conducted as part of a graduate student seminar within the MIT/WHOI Joint Program in Oceanography and will be led by the students taking the course. Processing of the data collected during the cruise will be performed by the students during the remainder of the fall semester. on Aug 21, 2017 12:37 PM by Elizabeth A. Caporelli | |
Science Activities | |
| Collect underway geophysical data: multi-beam bathymetry, gravity, magnetics, sub-bottom profile. A list of preliminary waypoints is uploaded below. These are the same as originally discussed in May when proposing the extra day for the transit. | |
| - Collect underway geophysical data: multi-beam bathymetry, gravity, magnetics, sub-bottom profile. A list of preliminary waypoints is uploaded below. These are the same as originally discussed in May when proposing the extra day for the transit. on Aug 21, 2017 12:37 PM by Elizabeth A. Caporelli | |
Additional Info | |
| Pre-cruise Planning Meeting: Teleconference/Visit WHOI | |
| - Teleconference/Visit WHOI on Aug 21, 2017 12:37 PM by Elizabeth A. Caporelli | |
| Meeting Notes: I can do either. If we want to involve Jean-Arthur we would probably need to do a telecon. | |
| - I can do either. If we want to involve Jean-Arthur we would probably need to do a telecon. on Aug 21, 2017 12:37 PM by Elizabeth A. Caporelli | |
| Media personnel on board: Writer | |
| - Writer on Aug 21, 2017 12:37 PM by Elizabeth A. Caporelli | |
| There is a possibility of a write from Time, but I don't know if this will actually pan out. | |
| - There is a possibility of a write from Time, but I don't know if this will actually pan out. on Aug 21, 2017 12:37 PM by Elizabeth A. Caporelli | |
Stations: | |
Supporting documentation: | |
| »GoogleEarth-ScreenShot-CruiseTrack.jpg | |
| »preliminary_waypoints.dat | |
| - added GoogleEarth-ScreenShot-CruiseTrack.jpg on Aug 21, 2017 12:37 PM by Elizabeth A. Caporelli | |
| - added preliminary_waypoints.dat on Aug 21, 2017 12:37 PM by Elizabeth A. Caporelli | |
Funding |
| Funding Agency: WHOI | |
| Grant or contract number: No number; just extra ship day | |
| Funding Agency: NSF | |
| Grant or contract number: OCE-14-58201 |
Scientific Instrumentation for R/V Armstrong |
Shipboard Equipment | |||||||||||
| Bathymetry System 12 kHz, | |||||||||||
| Bathymetry System 3.5 kHz , | |||||||||||
| EM122 (12 kHz) Multibeam Echosounder, | |||||||||||
| Plotters, | |||||||||||
Gravimeter  , | |||||||||||
| Towed Magnetometer | |||||||||||
| -added Gravimeter on Aug 21, 2017 12:37 PM by Elizabeth A. Caporelli | |||||||||||
| -added Towed Magnetometer on Aug 21, 2017 12:37 PM by Elizabeth A. Caporelli | |||||||||||
| -added Bathymetry System 12 kHz on Aug 21, 2017 12:37 PM by Elizabeth A. Caporelli | |||||||||||
| -added Bathymetry System 3.5 kHz on Aug 21, 2017 12:37 PM by Elizabeth A. Caporelli | |||||||||||
| -added EM122 (12 kHz) Multibeam Echosounder on Aug 21, 2017 12:37 PM by Elizabeth A. Caporelli | |||||||||||
| -added Plotters on Aug 21, 2017 12:37 PM by Elizabeth A. Caporelli | |||||||||||
| Shipboard Equipment Notes: We'd like to run the gravimeter, magnetometer, EM122 and the Knudsen 3620 subbottom profiler. I'm not sure the difference between the EM122 and the 12 kHz Bathymetry system listed here. Also, are there any problems running the EM122 and Knudsen simultaneously? | |||||||||||
Shipboard Communication | |||||||||||
| Basic Internet access via HiSeasNet | |||||||||||
| -added Basic Internet access via HiSeasNet on Aug 21, 2017 12:37 PM by Elizabeth A. Caporelli | |||||||||||
Critical CTD Sensors | |||||||||||
| Storage Notes: | |||||||||||
Navigation | |||||||||||
| Will you be using Long Base Line (LBL) navigation? | no | ||||||||||
| - added no on Aug 21, 2017 12:37 PM by Elizabeth A. Caporelli | |||||||||||
| How many nets? | null | ||||||||||
| How many tansponders? | null | ||||||||||
| Will you be using Ultra-short baseline (USBL) navigation? | no | ||||||||||
| - added no on Aug 21, 2017 12:37 PM by Elizabeth A. Caporelli | |||||||||||
Navigation | |||||||||||
| GPS | |||||||||||
| -added GPS on Aug 21, 2017 12:37 PM by Elizabeth A. Caporelli | |||||||||||
| Navigation Notes: | |||||||||||
| Winch Notes: | |||||||||||
| Winch Notes: | |||||||||||
Standard Oceanographic Cables | |||||||||||
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Specialized Deck Equipment | |||||||||||
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Over the Side Equipment | |||||||||||
| Will you be bringing any equipment (winches, blocks, etc.) that lowers instruments over the side? | yes | ||||||||||
| Details: The only over-the-side equipment will be the towed magnetometer. | |||||||||||
| - added The only over-the-side equipment will be the towed magnetometer. on Aug 21, 2017 12:37 PM by Elizabeth A. Caporelli | |||||||||||
Special Requirements | |||||||||||
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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? | no | ||||||||||
| - added no on Aug 21, 2017 12:37 PM by Elizabeth A. Caporelli | |||||||||||
| Describe deployment method and quantity: | |||||||||||
Radioactive Material | |||||||||||
| Radioiosotopes: | no | ||||||||||
Additional Information | |||||||||||
| Is night time work anticipated on this cruise? | no | ||||||||||
| - added no on Aug 21, 2017 12:37 PM by Elizabeth A. Caporelli | |||||||||||
| Specialized tech support (Seabeam, coring, other): | |||||||||||
| Other required equipment and special needs: Load equipment at WHOI before Armstrong departure on Sept 11th | |||||||||||
| - added Load equipment at WHOI before Armstrong departure on Sept 11th on Aug 21, 2017 12:38 PM by Elizabeth A. Caporelli | |||||||||||
Checklist & Notes |
Checklist | |
| U.S. Customs Form: | yes |
| - added yes on Aug 21, 2017 12:40 PM by Elizabeth A. Caporelli | |
| Diplomatic Clearance: | no |
| - added no on Aug 21, 2017 12:40 PM by Elizabeth A. Caporelli | |
| Date Submitted: | |
| Date Approved: | |
| Agent Information: | |
| Countries: | |
| Notes: | |
| Must fill out 4455 cutom forms 5 days before departure on 9/11 for any gear loaded onto the ship. | |
| - added Must fill out 4455 cutom forms 5 days before departure on 9/11 for any gear loaded onto the ship. on Aug 21, 2017 12:40 PM by Elizabeth A. Caporelli | |
| Isotope Use Approval: | no |
| - added no on Aug 21, 2017 12:40 PM by Elizabeth A. Caporelli | |
| Isotope Notes: | |
| SCUBA Diving: | no |
| - added no on Aug 21, 2017 12:40 PM by Elizabeth A. Caporelli | |
Checklist | |
| SSSG Tech: | |