NTAS 16 sixteenth setting of the NTAS Ocean Reference Station cruise on board RV Endeavor January 21 - February 8, 2017 Narragansett, Rhode Island - San Juan, Puerto Rico

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2017-07Author
Bigorre, Sebastien P.
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Pietro, Benjamin
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Hasbrouck, Emerson
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https://hdl.handle.net/1912/9466DOI
10.1575/1912/9466Keyword
Hydrography; Oceanographic instruments; MeteorologyAbstract
The Northwest Tropical Atlantic Station (NTAS) was established to address the need for
accurate air-sea flux estimates and upper ocean measurements in a region with strong sea surface
temperature anomalies and the likelihood of significant local air–sea interaction on inter-annual
to decadal timescales. The approach is to maintain a surface mooring outfitted for meteorological
and oceanographic measurements at a site near 15N, 51W by successive mooring turnarounds.
These observations are used to investigate air–sea interaction processes related to climate
variability. The NTAS Ocean Reference Station (ORS NTAS) is supported by the National
Oceanic and Atmospheric Administration’s (NOAA) Ocean Observing and Monitoring Division.
This report documents recovery of the NTAS-15 mooring and deployment of the NTAS-16
mooring. Both moorings used Surlyn foam buoys as the surface element. These buoys were
outfitted with two Air–Sea Interaction Meteorology (ASIMET) systems. Each system measures,
records, and transmits via Argos satellite the surface meteorological variables necessary to
compute air–sea fluxes of heat, moisture and momentum. The upper 160 m of the mooring line
were outfitted with oceanographic sensors for the measurement of temperature, salinity and
velocity.
The mooring turnaround was done by the Upper Ocean Processes Group of the Woods Hole
Oceanographic Institution (WHOI), onboard R/V Endeavor (cruise EN590). The cruise took
place between January 21 and February 8 2017. The NTAS-16 mooring was deployed on
January 30, and the NTAS-15 mooring was recovered on January 31. A 24-hour intercomparison
period was conducted on January 29 in front of the NTAS 15 buoy, and again on
February 1 in front of the NTAS 16 buoy. During the inter-comparisons, data from
instrumentation on the buoys, telemetered through Argos satellite system, and the ship’s
meteorological and oceanographic measurements were monitored while the ship was stationed
0.2 nm downwind of the buoys. This report describes these operations, as well as other work
done on the cruise and some of the pre-cruise buoy preparations.
Other operations during EN590 consisted in the recovery and deployment of the Meridional
Overturning Variability Experiment (MOVE) Pressure Inverted Echo Sounders (PIES) at two
MOVE arrays (MOVE 1 in the east, and MOVE 3 in the west near Guadeloupe). Acoustic
downloads of data from (PIES) and subsurface mooring (MOVE1, 3 and 4) were also conducted.
MOVE is designed to monitor the integrated deep meridional flow in the tropical North Atlantic.
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Suggested Citation
Bigorre, S. P., Pietro, B., & Hasbrouck, E. (2017). NTAS 16 sixteenth setting of the NTAS Ocean Reference Station cruise on board RV Endeavor January 21 - February 8, 2017 Narragansett, Rhode Island - San Juan, Puerto Rico. Woods Hole Oceanographic Institution. https://doi.org/10.1575/1912/9466Related items
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