Index Catalog // ScholarsArchive@OSU

Seasonal hydrology explains interannual and seasonal variation in carbon and water exchange in a semiarid mature ponderosa pine forest in central Oregon

Creator:: Thomas, Christoph, Law, Beverly E., Irvine, James, Martin, Jonathan, Pettijohn, J. Cory, and Davis, Kent J.
Abstract:: We analyzed 7 years (2002–2008) of micrometeorological and concurrent biological observations of carbon and water fluxes at a mature ponderosa pine forest in central Oregon in a semiarid climate. We sought to evaluate the extent that gross primary productivity, net ecosystem exchange, ecosystem respiration, net primary productivity, net ecosystem productivity,...
Resource Type:: Article
Full Text:: and Kent J. Davis2 Received 17 March 2009; revised 5 July 2009; accepted 30 July 2009; published 10

Very long period magnetotellurics at Tucson Observatory: estimation of impedances

Creator:: Egbert, Gary D., Booker, John R., and Schultz, Adam
Abstract:: Eleven years (1932-1942) of electric potential and magnetic measurement at the Tucson observatory represent a unique very long period magnetotelluric (MT) data set. We report here on a careful reanalysis of this data using modern processing techniques. We have developed and used novel methods for separating out the quasi-periodic daily...
Resource Type:: Article
Full Text:: . EGBERT College of Oceanography, Oregon State University, Corvallis JOHN R. BOOKER Geophysics

The timing and duration of the Karoo igneous event, southern Gondwana

Creator:: Duncan, Robert A., Hooper, P. R., Rehacek, J., Marsh, J. S., and Duncan, A. R.
Abstract:: A volcanic event of immense scale occurred within a relatively short period in early Jurassic time over large regions of the contiguous Gondwana supercontinent. In southern Africa, associated remnants of thick volcanic successions of lava flows and extensive dike and sill complexes of similar composition have been grouped together as...
Resource Type:: Article
Full Text:: ., J. Besse, D. Vandamme, R. Montigny, J.J. Jaeger, and H. Capetta, Deccan flood basalts at the

Origin of the Louisville ridge and its relationship to the Eltanin Fracture Zone System

Creator:: Watts, A. B., Weissel, J. K., Duncan, Robert A., and Larson, R. L.
Abstract:: We have combined shipboard and Seasat altimeter derived data in an intergrated geological and geophysical study of the Louisville Ridge; a 3500-km-long seamount chain extending from the Tonga trench to the Eltanin Fracture Zone. A break in the smooth trend of the ridge at latitude 37.5°S has been recognized in...
Resource Type:: Article
Full Text:: . WATTS 1 AND J. K. WEISSEL Lamont-Doherty Geological Observatory, Palisades, New York R. A. DUNCAN

Crustal fissuring and its relationship to magmatic and hydrothermal processes on the East Pacific Rise crest (9°12′ to 54′N)

Creator:: Wright, Dawn J., Haymon, Rachel M., and Fornari, Daniel J.
Abstract:: The deep-towed Argo I optical/acoustical vehicle and a geographic information system (GIS) have been used to establish the abundance, widths, and spatial distribution of fissures, as well as the relative age distribution of lavas along the narrow (<500 m wide) axial zone of the East Pacific Rise (EPR) from 9°12′...
Resource Type:: Article
Full Text:: relationship to magmatic and hydrothermal processes on the East Pacific Rise crest (9ø12 ' to 54'N) Dawn J

The spatial and temporal variability of sand bar morphology

Creator:: Lippmann, T. C. and Holman, R. A.
Abstract:: The spatial and temporal variability of nearshore sand bar morphology is quantified using a unique data set spanning 2 years. The data consist of daily time exposure images of incident wave breaking on an open coast sandy beach which may be used to infer bar morphology (Lippmann and Holman, 1989)....
Resource Type:: Article
Full Text:: Temporal Variability of Sand Bar Morphology T. C. LIPPMANN AND R. A. HOLMAN College of Oceanography

Geochemistry and geochronology of ancient southeast Indian and southwest Pacific seafloor

Creator:: Pyle, D. G., Christie, David M., Mahoney, J. J., and Duncan, Robert A.
Abstract:: Within the Australian-Antarctic Discordance (AAD), a boundary exists between isotopically defined “Pacific-type” and “Indian-type” mid-ocean ridge basalt (MORB) erupted along the Southeast Indian Ridge (SEIR). This boundary has migrated westward beneath the easternmost AAD spreading segment at a minimum rate of 25 mm/yr since 4 Ma; however, its long-term history...
Resource Type:: Article
Full Text:: University, Corvallis J. J. Mahoney Department of Geology and Geophysics, Woods Hole Oceanographic

Crustal fissuring on the crest of the southern East Pacific Rise at 17°15′–40′S

Creator:: Wright, Dawn J., Haymon, Rachel M., White, Scott M., and Macdonald, Ken C.
Abstract:: Fissure densities and widths have been mapped along the axial zone of the superfast spreading southern East Pacific Rise (EPR) at 17°15′–40′S with the near-bottom DSL-120 and Argo II imaging systems. We observe that the youngest lava flows (on a relative age scale) are sparsely fissured and that there is...
Resource Type:: Article
Full Text:: Pacific Rise at 17��150–400S Dawn J. Wright Department of Geosciences, Oregon State University

Introduction to special section on Recent Advances in the Study of Optical Variability in the Near-Surface and Upper Ocean

Creator:: Dickey, T., Banner, M. L., Bhandari, P., Boyd, Timothy John, 1958-2013, Carvalho, L., Chang, G., Chao, Y., Czerski, H., Darecki, M., Dong, C., Farmer, D., Freeman, S., Gemmrich, J., Gernez, P., Hall-Patch, N., Holt, B., Jiang, S., Jones, C., Kattawar, G., LeBel, D., Lenain, L., Lewis, M., Liu, Y., Logan, L., Manov, D., Melville, W. K., Moline, M. A., Morison, R., Nencioli, F., Pegau, W. S., Reineman, B., Robbins, I., Roettgers, R., Schultz, H., Shen, L., Shinki, M., Slivkoff, M., Sokolski, M., Spada, F., Statom, N., Stramski, D., Sutherland, P., Twardowski, M., Vagle, S., Van Dommelen, R., Voss, K., Washburn, L., Wei, J., Wijesekera, H., Wurl, O., Yang, D., Yildiz, S., You, Y., Yue, D. K. P., Zaneveld, R., and Zappa, C. J.
Abstract:: Optical variability occurs in the near-surface and upper ocean on very short time and space scales (e.g., milliseconds and millimeters and less) as well as greater scales. This variability is caused by solar, meteorological, and other physical forcing as well as biological and chemical processes that affect optical properties and...
Resource Type:: Article
Full Text:: . Washburn,38 J. Wei,23 H. Wijesekera,39 O. Wurl,40 D. Yang,31 S. Yildiz,35 Y. You,20,41 D. K. P. Yue,42 R

Vertical velocity, vertical diffusion, and dilution by midlatitude air in the tropical lower stratosphere

Creator:: Mote, Philip W., Dunkerton, Timothy J., McIntyre, Michael E., Ray, Eric A., Haynes, Peter H., and Russell, James M.
Abstract:: Air passing upward through the tropical tropopause is “marked” by an annually varying water vapor mixing ratio much as a tape recorder marks a magnetic tape; as the air ascends in the tropical stratosphere, these marks are effaced by a combination of vertical diffusion within the tropics and dilution of...
Resource Type:: Article
Full Text:: the tropical lower stratosphere Philip W. Mote, 1'2 Timothy J. Dunkerton, 1 Michael E. Mcintyre, 3

ScholarsArchive@OSU

Seasonal hydrology explains interannual and seasonal variation in carbon and water exchange in a semiarid mature ponderosa pine forest in central Oregon

Very long period magnetotellurics at Tucson Observatory: estimation of impedances

The timing and duration of the Karoo igneous event, southern Gondwana

Origin of the Louisville ridge and its relationship to the Eltanin Fracture Zone System

Crustal fissuring and its relationship to magmatic and hydrothermal processes on the East Pacific Rise crest (9°12′ to 54′N)

The spatial and temporal variability of sand bar morphology

Geochemistry and geochronology of ancient southeast Indian and southwest Pacific seafloor

Crustal fissuring on the crest of the southern East Pacific Rise at 17°15′–40′S

Introduction to special section on Recent Advances in the Study of Optical Variability in the Near-Surface and Upper Ocean

Vertical velocity, vertical diffusion, and dilution by midlatitude air in the tropical lower stratosphere

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