Index Catalog // ScholarsArchive@OSU

Creator:: McManus, James, Collier, Robert W., and Dymond, Jack
Abstract:: Subsurface hydrothermal activity dominates the heat and salt budgets of the deep water column in Crater Lake, Oregon. From a time series of conductivity-temperature-depth data and data from a thermistor chain mooring, we estimate that the net hydrothermal heat flow is ~1 W m⁻² and the corresponding salt flux is...
Resource Type:: Article
Full Text:: Lake, Oregon JAMES MCMANUS, 1 ROBERT W. COLLIER, AND JACK DYMOND College of Oceanography, Oregon

Creator:: Collier, Robert W., Dymond, Jack, and McManus, James
Abstract:: As a result of the past three years of field studies and our interpretation of these and other data from the literature, we conclude that there are inputs of hydrothermal fluids into the bottom of Crater Lake. The dissolved materials associated with these thermally and chemically enriched fluids, coupled with...
Resource Type:: Technical Report

Creator:: Dymond, Jack, Collier, Robert W., McManus, James, and Larson, Gary L.
Abstract:: Flux estimates show that upward mixing of the deep-water nitrate pool accounts for more than 85% of the total new nitrogen input to the euphotic zone of Crater Lake. Because measured primary productivity (360 mg C m-2 d-1) is 10–30 times higher than a level supported solely by the input...
Resource Type:: Article
Full Text:: DYMOND, JACK, ROBERT COLLIER, JAMES MCMANUS, AND GARY L

Creator:: McManus, James, Collier, Robert W., Chen, Chen-Tung A., and Dymond, Jack
Abstract:: Active inputs of thermally and chemically enriched fluids at the bottom of Crater Lake create small vertical and horizontal heterogeneities in the deep-lake temperature and salt distribution. Using an internally recording CTD and a precise definition for salinity as a function of in situ conductivity and temperature, we assess the...
Resource Type:: Article
Full Text:: MCMANUS, JAMES, ROBERT W. COLLIER, CHEN-TIJNG A. CHEN, AND J

Creator:: McManus, James, Collier, Robert W., Dymond, Jack, Wheat, C. Geoffrey, and Larson, Gary L.
Abstract:: Small temporal and spatial variations in the distribution of dissolved oxygen in Crater Lake, Oregon, are used to estimate the mean age of the lake’s deep water, the flux of labile organic carbon to the deep lake, and the influence of hydrothermal activity on the concentration of dissolved oxygen within...
Resource Type:: Article
Full Text:: MCMANUS, JAMES, ROBERT COLLIER, JACK DYMOND, C. GEOFF WHEAT

Creator:: Wheat, C. Geoffrey, McManus, James, Dymond, Jack, Collier, Robert W., and Whiticar, Michael
Abstract:: We present evidence for pore water flow through the sediment of Crater Lake, Oregon based on systematic variations in pore water chemical compositions and thermal gradients. Pore water was extracted from sediment by centrifugation and diffusive exchange using a gravity corer deployed from a surface vessel and a box corer...
Resource Type:: Article
Full Text:: , University of Alaska, Fairbanks James McManus, Jack Dymond, and Robert Collier College of Oceanic and

Creator:: Torres, Marta E., Brown, Kevin, Collier, Robert W., deAngelis, Marie, Hammond, Douglas, McManus, James, Rehder, Gregor, and Trehu, Anne
Abstract:: A massive release of methane on the Cascadia Hydrate Ridge was documented during a ROPOS program in August 1998, consistent with previously reported observations in 1996. An extensive survey of the seafloor revealed that the seeps lie within a narrow band trending 109 degrees. This feature parallels larger mounds imaged...
Resource Type:: Technical Report

Creator:: Collier, Robert W., Dymond, Jack, Oregon State University. College of Oceanography, and Cooperative Park Studies Unit (Corvallis, Or.)
Resource Type:: Technical Report
Full Text:: , OR 97331 In Collaboration With: Brad Beeson and James McManus Charles Bacon OSU College of

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