Index Catalog // ScholarsArchive@OSU

A High-Speed, Wireless Network for Ship-to-Ship and Ship-to-Shore Data Exchange

Creator:: Potter, Nathan D. and Cowles, Timothy J.
Abstract:: Wireless networking equipment was installed on three research vessels and at three shore stations during the 1998 Thin Layers Experiment in East Sound, Washington. This wireless network provided high-speed data communication between scientists on separate vessels and permitted rapid transfer of data from vessels and from moored instruments to a...
Resource Type:: Article
Full Text:: Data Exchange NATHAN D. POTTER AND TIMOTHY J. COWLES College of Oceanic and Atmospheric Sciences

Edge gradients provide evidence of ecological interactions in planktonic thin layers

Creator:: Benoit-Bird, Kelly J., Cowles, Timothy J., and Wingard, Christopher E.
Abstract:: Physical, optical, and acoustical data from Monterey Bay, California, USA, describing the distributions of phytoplankton, zooplankton, and small fish as well as gradients in the physical habitat were used to examine the interactions between vertically compressed plankton structures (thin layers), their consumers, and the local physical forces they experience. The...
Resource Type:: Article
Full Text:: Benoit-Bird, Kelly J., Timothy J. Cowles, and Christopher E

Acoustic doppler current profiler observations during the JGOFS AESOPS Antarctic polar front surveys I and II : R/V Revelle cruises from 20-Oct to 23-Nov 1997 and 9-Jan to 7-Feb 1998

Creator:: Pierce, Stephen D., Barth, John A., and Cowles, Timothy J.
Abstract:: We present velocity observations from a shipboard acoustic Doppler current profiler (ADCP) on RJV Revelle during cruises R9710 (20 October to 23 November 1997) and R9801 (9 January to 7 February 1998). The cruises were conducted as part of the Southern Ocean JGOFS (Joint Global Ocean Flux) Antarctic Polar Frontal...
Resource Type:: Technical Report
Full Text:: 1998 by S. D. Pierce, J. A. Barth, and T. J. Cowles College of Oceanic & Atmospheric Sciences

In situ monitoring of ocean chlorophyll via laser-induced fluorescence backscattering through an optical fiber

Creator:: Cowles, Timothy J., Moum, James N., Desiderio, Russell A., and Angel, Stanley M.
Abstract:: The first seagoing test of a prototype laser/fiber-optic system for in situ detection of ocean chlorophyll fluorescence is described. Radiation at 488 nm originating from a shipboard argon laser was transmitted through 20 of 200-µm core optical fiber to the distal tip mounted on the microstructure profiler, the Rapid Sampling...
Resource Type:: Article
Full Text:: fluorescence backscattering through an optical fiber Timothy J. Cowles, James N. Moum, Russell A. Desiderio

Multiple excitation fluorometer for in situ oceanographic applications

Creator:: Desiderio, Russell A., Moore, Casey, Lantz, Carl, and Cowles, Timothy J.
Abstract:: A new in situ fluorometer for the detection of oceanic photosynthetic pigment fluorescence is described. Emission spectra from 546 to 733 nm are recorded for each of three different visible excitation bands ten times a second. A Spectralon cell is used to improve the excitation coupling to and the collection...
Resource Type:: Article
Full Text:: , Casey Moore, Carl Lantz, and Timothy J. Cowles A new in situ fluorometer for the detection of oceanic

Mesoscale physical and bio-optical structure of the Antarctic Polar Front near 170°W during austral spring

Creator:: Barth, John A., Cowles, Timothy J., and Pierce, Stephen D.
Abstract:: As part of the U.S. Joint Global Ocean Flux Study Southern Ocean program, high-resolution surveys of the Antarctic Polar Front near 170øW were conducted during October-November 1997 with a towed undulating system equipped with conductivity-temperature-depth and bio-optical sensors. Transects along 170°W and two successive mapping surveys revealed zonal bands with...
Resource Type:: Article
Full Text:: Antarctic Polar Front near 170øW during austral spring John A. Barth, Timothy J. Cowles, and Stephen D

Mesoscale variablility in bacterial activity in the Northeast Pacific Ocean off Oregon, USA

Creator:: Sherr, Evelyn, Sherr, Barry F., and Cowles, Timothy J.
Abstract:: Variation in bacterial abundance and activity was assessed by sampling the upper 35 to 80 m of the water column during 2 to 5 d periods at 3 sites: eutrophic-mesotrophic midshelf, mesotrophic-oligotrophic slope, and oligotrophic gyre edge, off the Oregon coast in late summer 1997 and 1998. Bacterial abundances varied...
Resource Type:: Article
Full Text:: J. Cowles College of Oceanic and Atmospheric Sciences, Oregon State University, Corvallis, Oregon

Spectral variability of the particulate backscattering ratio

Creator:: Whitmire, Amanda L., Boss, Emmanuel, Cowles, Timothy J., and Pegau, W. Scott
Abstract:: The spectral dependency of the particulate backscattering ratio is relevant in the fields of ocean color inversion, light field modeling, and inferring particle properties from optical measurements. Aside from theoretical predictions for spherical, homogeneous particles, we have very limited knowledge of the actual in situ spectral variability of the particulate...
Resource Type:: Article
Full Text:: ratio A. L. Whitmire1, E. Boss2, T. J. Cowles1, and W. S. Pegau3 1College of Oceanic & Atmospheric

Microstructure Profiles of Laser-induced Chlorophyll Fluorescence Spectra: Evaluation of Backscatter and Forward-Scatter Fiber-Optic Sensors

Creator:: Desiderio, Russell A., Cowles, Timothy J., Moum, James N., and Myrick, Michael
Abstract:: The implementation and characterization of backscatter and forward-scatter fiber-optic fluorescence sensors attached to a microstructure profiling instrument are described. By using an optical multichannel array detector to record emission spectra, eight profiles per hour of chlorophyll fluorescence spectra at 2-cm intervals can be obtained throughout the upper 100 m of...
Resource Type:: Article

Acoustic doppler current profiler observations during the JGOFS AESOPS Antarctic polar front process studies I and II : R/V Revelle cruises from 30-Nov-97 to 3-Jan-98 and 13-Feb-98 to 19-Mar-98

Creator:: Pierce, Stephen D., Barth, John A., and Cowles, Timothy J.
Abstract:: We present velocity observations from a shipboard acoustic Doppler current profiler (ADCP) on RIV Revelle during cruises R9711 (30 November 1997 to 3 January 1998) and R9802 (13 February 1998 to 19 March 1998). The cruises were conducted as part of the Southern Ocean JGOFS (Joint Global Ocean Flux) Antarctic...
Resource Type:: Technical Report

ScholarsArchive@OSU

A High-Speed, Wireless Network for Ship-to-Ship and Ship-to-Shore Data Exchange

Edge gradients provide evidence of ecological interactions in planktonic thin layers

Acoustic doppler current profiler observations during the JGOFS AESOPS Antarctic polar front surveys I and II : R/V Revelle cruises from 20-Oct to 23-Nov 1997 and 9-Jan to 7-Feb 1998

In situ monitoring of ocean chlorophyll via laser-induced fluorescence backscattering through an optical fiber

Multiple excitation fluorometer for in situ oceanographic applications

Mesoscale physical and bio-optical structure of the Antarctic Polar Front near 170°W during austral spring

Mesoscale variablility in bacterial activity in the Northeast Pacific Ocean off Oregon, USA

Spectral variability of the particulate backscattering ratio

Microstructure Profiles of Laser-induced Chlorophyll Fluorescence Spectra: Evaluation of Backscatter and Forward-Scatter Fiber-Optic Sensors

Acoustic doppler current profiler observations during the JGOFS AESOPS Antarctic polar front process studies I and II : R/V Revelle cruises from 30-Nov-97 to 3-Jan-98 and 13-Feb-98 to 19-Mar-98

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