Woods Hole Oceanographic Institution
Cruise Planning Synopsis
AR29: McGillicuddy (SBF) | |
Ship | |
RV Neil Armstrong | |
Cruise Party | |
Dennis McGillicuddy: Chief Scientist, Principal Investigator Woods Hole Oceanographic Institution Bigelow 209A, MS#11 Woods Hole, Ma. USA 02543 +1 508 289 2683 mcgillic@whoi.edu Christian Petitpas: Principal Investigator UMass Dartmouth USA +1 508 999 8953 cjadlowic@umassd.edu Walker Smith: Principal Investigator Virginia Institute of Marine Science USA +1 804 684 7709 wos@vims.edu Heidi M. Sosik: Principal Investigator Woods Hole Oceanographic Institution Redfield 3-16, MS#32 Woods Hole, Ma. USA 02543 +1 508 289 2311 hsosik@whoi.edu Rachel Stanley: Principal Investigator Wellesley College USA +1 781 283 3122 rachel.stanley@wellesley.edu Jefferson Turner: Principal Investigator UMass Dartmouth USA +1 508 999 8229 jturner@umassd.edu Weifeng Zhang: Principal Investigator Woods Hole Oceanographic Institution Bigelow 201, MS#11 Woods Hole, Ma. USA 02543 +1 508 289 2521 wzhang@whoi.edu |
Departure: Apr 17, 2018 | |
WHOI | |
Arrival: Apr 30, 2018 | |
WHOI | |
Operations Area | |
OOI Pioneer Array | |
Lat/Lon: 40° 0.0′ N / 71° 0.0′ W | |
Depth Range: 60 / 2500 | |
Will the vessel be operating within 200 NM of a foreign country? | no |
Science Objectives | |
The continental shelfbreak of the Middle Atlantic Bight supports a productive and diverse ecosystem. Current paradigms suggest that this productivity is driven by several upwelling mechanisms at the shelfbreak front. This upwelling supplies nutrients that stimulate primary production by phytoplankton, which in turn leads to enhanced production at higher trophic levels. Although local enhancement of phytoplankton biomass has been observed in some synoptic measurements, such a feature is curiously absent from time-averaged measurements, both remotely sensed and in situ. Why would there not be a mean enhancement in phytoplankton biomass as a result of the upwelling? One hypothesis is that grazing by zooplankton prevents accumulation of biomass on seasonal and longer time scales, transferring the excess production to higher trophic levels and thereby contributing to the overall productivity of the ecosystem. However, another possibility is that the net impact of these highly intermittent processes is not adequately represented in long-term means of the observations, because of the relatively low resolution of the in situ data and the fact that the frontal enhancement can take place below the depth observable by satellite. | |
Science Activities | |
We will obtain cross-shelf sections of physical, chemical, and biological properties within the Pioneer Array. Nutrient distributions will be assayed together with hydrography to detect the signature of frontal upwelling and associated nutrient supply. We expect that enhanced nutrient supply will lead to changes in the phytoplankton assemblage, which will be quantified with conventional flow cytometry, imaging flow cytometry (Imaging FlowCytobot, IFCB), in situ optical imaging (Video Plankton Recorder, VPR), traditional microscopic methods, and HPLC pigments. Zooplankton will be measured in size classes ranging from micro- to mesozooplankton with the IFCB and VPR, respectively, and also with microscopic analysis. Biological responses to upwelling will be assessed by measuring rates of primary productivity, zooplankton grazing, and net community production. These observations will be synthesized in the context of a coupled physical-biological model to test the two hypotheses that can potentially explain prior observations: (1) grazer-mediated control and (2) undersampling. Hindcast simulations will also be used to diagnose the relative importance of the various mechanisms of upwelling. | |
Additional Info | |
Pre-cruise Planning Meeting: Visit WHOI | |
Media personnel on board: Video | |
Dan Brinkhaus (ScienceMedia) will film a documentary. | |
Stations: | |
Supporting documentation: | |
»station_coordinates.txt |
Funding |
Funding Agency: NSF | |
Grant or contract number: 1657803 |
Scientific Instrumentation for R/V Armstrong |
Shipboard Equipment | |||||||||||
Bathymetry System 12 kHz | |||||||||||
ADCP 300 kHz | |||||||||||
ADCP 150 kHz | |||||||||||
A-Frame | |||||||||||
Deionized Water System | |||||||||||
Science Underway Seawater System | |||||||||||
Fume Hood | |||||||||||
EK80 Sonar | |||||||||||
Dynamic Positioning System | |||||||||||
Incubation Area | |||||||||||
ADCP 38 kHz | |||||||||||
Crane | |||||||||||
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? | |||||||||||
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 | |||||||||||
MET Sensors | |||||||||||
Barometric Pressure | |||||||||||
Air temperature | |||||||||||
Precipitation | |||||||||||
Relative Humidity | |||||||||||
Wind speed and direction | |||||||||||
Short Wave Solar Radiation | |||||||||||
Long Wave Solar Radiation | |||||||||||
Sample Storage | |||||||||||
Freezer -70°C 25 cu. ft. | |||||||||||
Freezer -70°C 3.2 cu. ft. ea. | |||||||||||
Storage Notes: | |||||||||||
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 | |||||||||||
UNOLS Winch Pool | |||||||||||
Winch Notes: | |||||||||||
Wire use and application | |||||||||||
CTD Winch with .322" Electro-mechanical wire | |||||||||||
Winch Notes: | |||||||||||
Standard Oceanographic Cables | |||||||||||
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Portable Vans | |||||||||||
Isotope Van | |||||||||||
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: VPR winch | |||||||||||
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? | yes | ||||||||||
Describe deployment method and quantity: | |||||||||||
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: | no |
Diplomatic Clearance: | no |
Date Submitted: | |
Date Approved: | |
Agent Information: | |
Countries: | |
Notes: | |
Isotope Use Approval: | no |
Isotope Notes: | |
SCUBA Diving: | no |
Checklist | |
SSSG Tech: | |