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    The Northwest Tropical Atlantic Station (NTAS) : NTAS-2 mooring turnaround cruise report

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    WHOI-2002-07.pdf (11.33Mb)
    Date
    2002-09
    Author
    Plueddemann, Albert J.  Concept link
    Ostrom, William M.  Concept link
    Galbraith, Nancy R.  Concept link
    Bouchard, Paul R.  Concept link
    Tupper, George H.  Concept link
    Dunn, James M.  Concept link
    Walsh, M. Alexander  Concept link
    Metadata
    Show full item record
    Citable URI
    https://hdl.handle.net/1912/42
    Location
    15°N, 51°W
    DOI
    10.1575/1912/42
    Keyword
     Air-sea interaction; Tropical Atlantic; Moored instrumentation; Ronald H. Brown (Ship) Cruise RB02-02 
    Abstract
    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 interannual to decadal timescales. The approach is to maintain a surface mooring outfitted for meteorological and oceanographic measurements at a site near 15°N, 51°W by successive mooring turnarounds. These observations will be used to investigate air–sea interaction processes related to climate variability. Deployment of the first NTAS mooring (NTAS-1) at 14°50′ N, 51°00′ W on 30 March 2001 was documented in a previous report (Plueddemann et al., 2001). This report documents recovery of the NTAS-1 mooring and deployment of the NTAS-2 mooring at the same site. Both moorings used 3-meter discus 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 120 m of the NTAS-1 mooring line, and the upper 150 m of the NTAS-2 mooring line, were outfitted with oceanographic sensors for the measurement of temperature and velocity. The mooring turnaround was done on the NOAA Ship Ronald H. Brown, Cruise RB-02-02, by the Upper Ocean Processes Group of the Woods Hole Oceanographic Institution. The cruise took place between 2 and 8 March 2002. A SeaBeam bathymetry survey of the site was done first, followed by deployment of the NTAS-2 mooring on 4 March at approximately 14°44.3′ N, 50°56.8′ W in 5043 m of water. A 24-hour intercomparison period followed, after which the NTAS-1 mooring was recovered. This report describes these operations, as well as some of the pre-cruise buoy preparations.
    Collections
    • Physical Oceanography (PO)
    • WHOI Technical Reports
    Suggested Citation
    Plueddemann, A. J., Ostrom, W. M., Galbraith, N. R., Bouchard, P. R., Tupper, G. H., Dunn, J. M., & Walsh, M. A. (2002). The Northwest Tropical Atlantic Station (NTAS): NTAS-2 mooring turnaround cruise report. Woods Hole Oceanographic Institution. https://doi.org/10.1575/1912/42
     

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