Ocean current profiling using ocean acoustic tomography (OAT) was conducted in the Kuroshio Current southeast of Taiwan from August 20 to September 15, 2009. Sound pulses were transmitted reciprocally between two acoustic stations placed near the underwater sound channel axis and separated by 48 km. Based on the result of ray simulation, the received signals are divided into multiple ray groups...

cientists and engineers in the APL Space Department have made notable contributions to ocean remote sensing science and technology for more than a quarter of a century. Radar altimeters designed and built at APL have set the standard for measurement precision and reliability, and concepts for new instruments promise to maintain this leadership. A variety of techniques have also been developed t...

Visualization of multivariate dataset has a great importance on understanding numerical simulation results. Meanwhile, there are few reports on effective application to geophysical fluid simulation dataset. In this study, we apply multidimensional transfer functions which can represent two or three physical variables simultaneously to geophysical fluid simulation such as global ocean model and ...

In early May of 1998 we saw the sea surface temperature signature of one of the strongest El Niños on record decay within a span of several weeks. At 125W the SST dropped over 5 oC in 17 days. What caused this abrupt end to the 1997-1998 El Niño? It is my goal to attempt to answer this question, at least in part, through the investigation of TAO mooring data including wind velocity, ocean SST, ...

Planktonic communities are shaped through a balance of local evolutionary adaptation and ecological succession driven in large part by migration. The timescales over which these processes operate are still largely unresolved. Here we use Lagrangian particle tracking and network theory to quantify the timescale over which surface currents connect different regions of the global ocean. We find th...

The maintenance of the ocean general circulation requires energy input from the wind. Previous studies estimate that the mean rate of wind work (or wind power) acting on the surface currents over the global ocean amounts to 1.1 TW (1 TW ! 10 Watts), though values remain highly uncertain. By analyzing the output from a range of ocean-only models and data assimilations, we show that the tropical ...

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...

Analyzing the vortex-induced vibration of a slender marine structure withlength to diameter ratio up to 200 is the objective of this study. This slender is free to move in both in-line and cross flow directions and immersed completely in water. Three different types of shear currents pass on it and cause to vibrate slender in different forms. Nowadays, these vibrations are very important for de...

Ocean currents could adjust ocean carbon and nitrogen composition which are an important part of the global cycle. We procured concentrations particulate in different depths, classified them according to (upper 300 m), analyzed POC-to-PON ratio (particulate organic carbon-to-nitrogen ratio) variations. found that regions with have a higher than those without northern hemisphere, except 50°–60°N...

Fossils of marine microorganisms such as planktic foraminifera are among the cornerstones of palaeoclimatological studies. It is often assumed that the proxies derived from their shells represent ocean conditions above the location where they were deposited. Planktic foraminifera, however, are carried by ocean currents and, depending on the life traits of the species, potentially incorporate di...