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TrehuAnneCEOASTemporalVariationMethane(Supplement).pdf

Creator:: Kannberg, Peter K., Tréhu, Anne, Pierce, Stephen D, Paull, Charles K, and Caress, David W.
Abstract:: While bubble plumes have been acoustically imaged in the water column above marine gas hydrate deposits in many studies, little is known about the temporal variation in plume intensity. In July 2008, we conducted surveys using 3.5 and 12 kHz echosounders and a 75 kHz acoustic Doppler current profiler (ADCP)...
Resource Type:: Article
Full Text::  M. Trehu, Stephen D. Pierce, Charles K. Paull, David W. Caress        Figures S1 to S6 show images

TrehuAnneCEOASTemporalVariationMethane.pdf

Creator:: Kannberg, Peter K., Tréhu, Anne, Pierce, Stephen D, Paull, Charles K, and Caress, David W.
Abstract:: While bubble plumes have been acoustically imaged in the water column above marine gas hydrate deposits in many studies, little is known about the temporal variation in plume intensity. In July 2008, we conducted surveys using 3.5 and 12 kHz echosounders and a 75 kHz acoustic Doppler current profiler (ADCP)...
Resource Type:: Article
Full Text:: Pierce, PhD; Charles K Paull, PhD; David W Caress, PhD Abstract: While bubble plumes have been

Temporal variation of methane flares in the ocean above Hydrate Ridge, Oregon

Creator:: Kannberg, Peter K., Tréhu, Anne, Pierce, Stephen D., Paull, Charles K., and Caress, David W.
Abstract:: While bubble plumes have been acoustically imaged in the water column above marine gas hydrate deposits in many studies, little is known about the temporal variation in plume intensity. In July 2008, we conducted surveys using 3.5 and 12 kHz echosounders and a 75 kHz acoustic Doppler current profiler (ADCP)...
Resource Type:: Article

Repeat bathymetric surveys at 1-metre resolution of lava flows erupted at Axial Seamount in April 2011

Creator:: Caress, David W., Clague, David A., Paduan, Jennifer B., Martin, Julie F., Dreyer, Brian M., Chadwick, William W., Jr., Denny, Alden, and Kelley, Deborah S.
Abstract:: At sites with frequent submarine volcanic activity, it is difficult to discern between new and pre-existing lava flows. In particular, the distribution of the fissures from which lava erupts, the routes taken by lava flows and the relationship between the new flows and the pre-existing seafloor bathymetry are often unclear....
Resource Type:: Article
Full Text:: flows erupted at Axial Seamount in April 2011 David W. Caress1*, David A. Clague1, Jennifer B. Paduan1

Geologic history of the summit of Axial Seamount, Juan de Fuca Ridge

Creator:: Clague, David A., Dreyer, Brian M., Paduan, Jennifer B., Martin, Julie F., Chadwick, William W., Jr., Caress, David W., Portner, Ryan A., Guilderson, Thomas P., McGann, Mary L., Thomas, Hans, Butterfield, David A., and Embley, Robert W.
Abstract:: Multibeam (1 m resolution) and side scan data collected from an autonomous underwater vehicle, and lava samples, radiocarbon-dated sediment cores, and observations of flow contacts collected by remotely operated vehicle were combined to reconstruct the geologic history and flow emplacement processes on Axial Seamount’s summit and upper rift zones. The...
Resource Type:: Article

Volcanic Eruptions in the Deep Sea

Creator:: Rubin, Kenneth H., Soule, S. Adam, Chadwick, William W., Jr., Fornari, Daniel J., Clague, David A., Embley, Robert W., Baker, Edward T., Perfit, Michael R., Caress, David W., and Dziak, Robert P.
Abstract:: Volcanic eruptions are important events in Earth’s cycle of magma generation and crustal construction. Over durations of hours to years, eruptions produce new deposits of lava and/or fragmentary ejecta, transfer heat and magmatic volatiles from Earth’s interior to the overlying air or seawater, and significantly modify the landscape and perturb...
Resource Type:: Article
Full Text:: Geological Sciences, University of Florida, Gainesville, FL, USA. David W. Caress is Software Engineer

Stability and density management in Douglas-fir plantations

Creator:: Hann, David W.
Abstract:: In their recent Canadian Journal of Forest Research Comment 368 article, Wilson and Oliver (2000) developed an equation for predicting the average ratio of height to diameter at breast height for the largest 250 trees/ha (H/DL250) in unthinned stands as a function of initial density and dominant height of the...
Resource Type:: Article
Full Text:: -fir plantations1 David W. Hann Comment 368In their recentCanadian Journal of Forest Researcharti

Observational and theoretical studies of the dynamics of mantle plume-mid-ocean ridge interaction

Creator:: Ito, G., Lin, J., and Graham, David W.
Abstract:: Hot spot–mid-ocean ridge interactions cause many of the largest structural and chemical anomalies in Earth’s ocean basins. Correlated geophysical and geochemical anomalies are widely explained by mantle plumes that deliver hot and compositionally distinct material toward and along mid-ocean ridges. Compositional anomalies are seen in trace element and isotope ratios,...
Resource Type:: Article
Full Text:: dimensionless quantities that control the width W that plume material flows along a mid-ocean ridge. Buoyancy

The 1998 eruption of Axial Seamount: New insights on submarine lava flow emplacement from high-resolution mapping

Creator:: Chadwick, William W., Jr., Clague, D. A., Embley, R. W., Perfit, M. R., Butterfield, D. A., Caress, D. W., Paduan, J. B., Martin, J. F., Sasnett, P., Merle, S. G., and Bobbitt, A. M.
Abstract:: Axial Seamount, an active submarine volcano on the Juan de Fuca Ridge at 46°N, 130°W, erupted in January 1998 along 11 km of its upper south rift zone. We use ship-based multibeam sonar, high-resolution (1 m) bathymetry, sidescan sonar imagery, and submersible dive observations to map four separate 1998 lava...
Resource Type:: Article

Evaluation of individual-tree and disaggregative prediction methods for Douglas-fir stands in western Oregon

Creator:: Ritchie, Martin W. and Hann, David W.
Abstract:: The efficiency of six disaggregative methods and two individual-tree methods was evaluated in terms of their ability to predict 5-year basal area increment for Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) stands in western Oregon. Models were developed for predicting gross stand basal-area increment and individual-tree diameter increment. In addition, models were...
Resource Type:: Article
Full Text:: Douglas-fir stands in western Oregon1 Martin W. Ritchie and David W. Hann Abstract: The efficiency of

ScholarsArchive@OSU

TrehuAnneCEOASTemporalVariationMethane(Supplement).pdf

TrehuAnneCEOASTemporalVariationMethane.pdf

Temporal variation of methane flares in the ocean above Hydrate Ridge, Oregon

Repeat bathymetric surveys at 1-metre resolution of lava flows erupted at Axial Seamount in April 2011

Geologic history of the summit of Axial Seamount, Juan de Fuca Ridge

Volcanic Eruptions in the Deep Sea

Stability and density management in Douglas-fir plantations

Observational and theoretical studies of the dynamics of mantle plume-mid-ocean ridge interaction

The 1998 eruption of Axial Seamount: New insights on submarine lava flow emplacement from high-resolution mapping

Evaluation of individual-tree and disaggregative prediction methods for Douglas-fir stands in western Oregon

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