James T Patten

• University of South Florida

Prior investigations of Eu³⁺ complexation by silicate have led to predictions that rare earth silicate complexes are the dominant species of REEs in deep waters of the Atlantic and Pacific Oceans. The proposed importance of REE–silicate complexes has been used as a foundation to explain oceanic REE profiles. In the present work, we examine the sign...

An autonomous multi-parameter flow-through CO2 system has been developed to simultaneously measure surface seawater pH, carbon dioxide fugacity (fCO2), and total dissolved inorganic carbon (DIC). All three measurements are based on spectrophotometric determinations of solution pH at multiple wavelengths using sulfonephthalein indicators. The pH opt...

Aircraft images were collected near Lee Stocking Island (LSI), Bahamas, with wavelike features for bright sand bottoms during times when solar zenith angles were large. The image contrast between leading and trailing wave facets approached a 10-15% difference because of algae accumulations in wave troughs or topographic variations of the bottom. Re...

Predictive models for tides, hydrodynamics, and bio-optical properties affecting the visibility and buoyancy of coastal waters are needed to evaluate the safety of personnel and equipment engaged in maritime operations under potentially hazardous conditions. Predicted currents can be markedly different for two-layer systems affected by terrestrial...

We discuss an in situ marine imaging system based on high-speed digital line scan cameras for collection of a continuous picture of microscopic marine particles ranging in size from 200 μm to several centimeters. The system is built to operate on a 53-cm-diameter autonomous underwater vehicle or a tethered platform. The digital imaging system provi...

An automated field analysis strategy for aqueous environments is proposed with the use of a mobile robot equipped with an underwater mass spectrometer aided by linked remote numerical models or natural intelligence. Intelligent search strategies were made possible through the use of numerical models, and natural intelligence was in the form of a ma...

Predictive models for tides, hydrodynamics, and bio-optical properties affecting the visibility and buoyancy of coastal waters are needed to evaluate the safety of personnel and equipment engaged in maritime operations under potentially hazardous conditions. Predicted currents can be markedly different for two-layer systems affected by terrestrial...

The oceanographic community is seeing new and substantial advances in the development of underwater vehicles. The future is near when we will witness networked fleets that will acquire synoptic data over wide areas. The potential of multiple, concurrent AUV/UUV deployments promises the ocean research community with increased data accuracy, the elim...

Previous oceanographic imaging systems have relied on analog video or film recording methods to capture images of microscopic marine particles. Video system resolution is limited by the two-dimensional detector array used. High-resolution images are attainable, but typically with reduced imaging area. Recording to analog videotape has the added pro...