We hypothesize that the interannual variability of the Northeast Pacific Ocean circulation affects the latitude of landfall and migration speed of adult sockeye salmon (Oncorhynchus nerka) returning to the Fraser River. The Ocean Surface Current Simulations (OSCURS) model was used to simulate the return migration paths of compass-orientated sockeye for two years: 1982, which had a weak Alaska G...

Using a combination of Quick Scatterometer (QuikSCAT), Advanced Microwave Scanning Radiometer-Earth Observing System (AMSR-E), and Lagrangian drifter measurements, we demonstrate that wind data alone are not sufficient to derive ocean surface stress (momentum flux) over mid-latitude ocean fronts, specifically the Kuroshio Extension. There was no continuous and large-scale stress measurement ove...

In the event of marine disasters due either to natural events such as severe storms, or human-induced occurrences such as an oil spill, there is a need to have accurate reconstructions and predictions of ocean circulation and sea-state. A prime requirement for the accurate prediction of ocean waves, currents and sea level is the availability of reliable surface wind predictions. The main aim of...

Ice drift in the marginal ice zone (MIZ) is a very important feature of air-ice-ocean interaction at high latitude. Thermally generated surface winds, blowing from ice to water (ice breeze) with some deflection due to the eart.h rotation, force the ice drift and ocean currents near the MIZ. By changing the surface temperature Cilradient, the ice motion and the ocean currents feed back on the su...

High-resolution ocean general circulation models have advanced the numerical study of ocean eddies. To gain an understanding of ocean eddies from the large volume of data produced by simulations, visualizing just the distribution of eddies at each time step is insufficient; timevariations in eddy events and phenomena must also be considered. However, existing methods cannot accurately detect an...

This paper presents a novel Nonlinear Model Predictive Control (NMPC) scheme for underwater robotic vehicles operating in a constrained workspace including static obstacles. The purpose of the controller is to guide the vehicle towards specific way points with guaranteed input and state constraints (i.e obstacle avoidance, workspace boundaries). The proposed scheme incorporates the full dynamic...

Few at-sea behavioural data exist for oceanic-stage neonate sea turtles, a life-stage commonly referred to as the sea turtle 'lost years'. Historically, the long-term tracking of small, fast-growing organisms in the open ocean was logistically or technologically impossible. Here, we provide the first long-term satellite tracks of neonate sea turtles. Loggerheads (Caretta caretta) were remotely ...

Three-dimensional Princeton Ocean Model (POM) is used to understand coastal ocean processes and its variability along the west coast of India. An attempt is first made to understand variability of the surface circulation and associated SST during July-August 2000 and 2002 as a response of daily wind stress forcing derived from the QSCAT winds. The coastal current reverses its direction to eithe...

Turbidity currents in the ocean and lakes are driven by suspended sediment. The vertical profiles of velocity and excess density are shaped by interaction between the current and bed as well as between the current and the ambient water. This paper presents 48 series of experiments in which saline gravity currents flow through a laboratory sinuous flume. flume contains three successive bends wit...