Observed Circulation in Upper West Passage of Narragansett Bay, Sept 2013

[ Survey location and context for following figures described in Deployments. ]

Figure 1. Water velocity profile measurements by ADCP on SCOAP during ~35 minute late flood period, when transiting 4km east-west transect (shown in Deployments) eastward at ~4-5 knots. Transects such as the two shown here (Figs 1 & 2) were collected each half hour for a period of about 10 hours. Upper frame: Eastward velocity. Lower frame: Northward velocity. Scale: red positive 25 cm/s, violet negative 25 cm/s.

Figure 2. Same as Fig. 1, but ~4 hours later, during peak ebb. The northward velocity has become strongly negative, indicative of southward-directed ebb flow.

Filimon, M.A. and D.L. Codiga, 2016: An AIS-Based Site Planning Method to Help Minimize Collision Risk during Marine Autonomous Surface Craft Deployments. J. Atmos. Oceanic Technol., 33, 1251–1255, https://doi.org/10.1175/JTECH-D-16-0052

Codiga, D.L., 2015. A Marine Autonomous Surface Craft for Long-Duration, Spatially Explicit, Multidisciplinary Water Column Sampling in Coastal and Estuarine Systems. J. Atmos. Oceanic Technol., 32, 627–641. doi: http://dx.doi.org/10.1175/JTECH-D-14-00171.1

Codiga, D.L, 2013. An Autonomous Surface Craft for Long-Duration, Multi-Disciplinary Sampling in Coastal and Estuarine Systems: Initial SCOAP Field Results. Mid-Atlantic Bight Physical Oceanography and Meteorology Conference, Narragansett, RI.

Nehra, A and D.L. Codiga, 2013. Networked Utilities for Reliable and Safe Transfers of Control Between Native Mission Software and Backseat MOOS-IvP Helm on an Autonomous Surface Craft. Mission Oriented Operation Suite Development and Applications Working Group 2013, Massachusetts Institute of Technology, Cambridge, MA.

Filimon, M.A. and D.L. Codiga, 2013. MOOS-IvP Helm Based Simulations of Collision Avoidance by an Autonomous Surface Craft Performing Repeat-Transect Oceanographic Surveys. Mission Oriented Operation Suite Development and Applications Working Group 2013, Massachusetts Institute of Technology, Cambridge, MA.

Filimon, M. A., 2013: Site planning and on-board collision avoidance software to optimize autonomous surface craft surveys. M.S. Thesis, University of Rhode Island, Dept. of Ocean Engineering, 62 pp.