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Models and Simulations of Tracer Dispersal by Mid-ocean Mesoscale Eddies
Haidvogel and Keffer (1984) have examined the stirring and mixing of a passive tracer in a turbulent mesoscale eddy field for environmental parameters characteristic of a homogeneous mid-ocean region. This study utilized two numerical models, based respectively on the barotropic vorticity and advective-diffusive equations, to simulate the evolving mid-ocean eddy field and the associated dispersion of an embedded tracer spot. Here, these models are described in detail, and the full suite of tracer release simulations are shown in the form of contour plots.
Data Management for Social Scientists
Equips social scientists with the tools and techniques to conduct quantitative research in the age of big data.
The Horizontal Mooring
A moored two dimensional array with instrumentation distributed both horizontally and vertically was deployed for 27 days in August 1998 at an 85 meter deep site in Massachusetts Bay near Stellwagon basin. The horizontal mooring consisted of a 160 meter long horizontal element positioned at a depth of 20 meters between two subsurface moorings. Suspended below the horizontal member were five 25 meter long vertical strings. The vertical strings had a horizontal separation of 30 meters and each had instruments at depths of 20, 25, 30, 35, 40 and 45 meters. Instrumentation deployed on the two dimensional array included acoustic current meters, temperature sensors, conductivity measuring instruments, pressure sensors and motion monitoring packages. This report includes a detailed description of the two dimensional array, the anchoring system and the instrumentation that were deployed. Also included is a description of the deployment and recovery techniques that were employed, as well as an assessment of the performance of the array.
CTD Observations Off Northern California During the Shelf Mixed Layer Experiment, SMILE, May 1989
CTD observations were made off the northern California coast during R/V Wecoma cruise W8905 May 5-14, 1989 as part of the Shelf Mixed Layer Experiment (SMILE). The surveys consisted of two sampling plans - a large-scale grid of four cross-shelf transects extending to both sides of Point Arena and Point Reyes, and a small-scale grid of six cross-shelf transects located near the central SMILE mooring site. All of the cross-shelf transects extended beyond the shelf break and the maximum sampling depth at each station was near-bottom or 1500 m. The average along-shelf separation between cross-shelf transects was about 15 km for the small-scale surveys and 50 km for the large-scale grid. The prim...
