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Summer Research Internships for Undergraduates

Oregon State University is proud to announce the availability of paid research internships for 20 students during each summer. Ten students will be located at the College of Earth, Ocean, and Atmospheric Sciences (CEOAS) in Corvallis, and another 10 located at the Hatfield Marine Science Center (HMSC), 60 miles west on the Pacific coast in Newport.

Funded by the National Science Foundation, the Research Experience for Undergraduates (REU) program offers students the unique opportunity to work on individual research projects, and participate in group field trips, seminars and science colloquia over a 10-week period at CEOAS and HMSC under the guidance of university and research agency scientists, who serve as mentors. The REU program runs from June 16 to August 22, 2014. On-site housing at OSU or HMSC and a weekly stipend are provided.

CEOAS offers a particularly broad range of undergraduate research opportunities and engineering applications in the physics, chemistry, geology and biology of the Earth, ocean and atmosphere. We welcome applications from students with backgrounds and interests in any of these areas, including biology, chemistry, earth science, physics, mathematics, computer science, or engineering majors.

If you want to apply what you've learned in the classroom to real world problems, then a research experience in the earth, ocean, and atmospheric sciences may be right for you. The earth, ocean, and atmospheric sciences are applied sciences - we draw on knowledge from a variety of academic backgrounds to solve real-world problems. Examples include:

While students work independently with their research mentors, there are numerous opportunities to interact with other scientists and students in CEOAS and other departments on the Corvallis campus and at the Hatfield Marine Science Center in Newport, through orientation, weekly seminars, group field trips, social events, and final project presentations. A list of potential mentors and project research areas appears below. Please remember to browse this list and indicate those faculty and research areas that most interest you on your application.

More information including the online application and instructions on how to apply and descriptions of student projects from past years is available on OSU's marine science REU site (both CEOAS [Corvallis] and HSMC [Newport] summer REU positions use the same application).

A listing of CEOAS faculty mentors and potential REU projects follows below. Be sure to list the faculty mentors and projects that interest you on your application.

For more information specific to the CEOAS internships, please contact Kaplan Yalcin.

CEOAS Mentors, Summer Internships

Hal Batchelder Hal Batchelder
PhD, Oregon State University (Oceanography), 1986
MS, Oregon State University (Oceanography), 1980
BS, University of Maine (Biology), 1977

Interests: Zooplankton ecology; population and community ecology, role of the physical environment in determining the distribution, abundance, and behavior of zooplankton, and the adaptations of organisms to their environment; trophodynamics and population ecology of marine copepods; model descriptions of population dynamics of marine organisms; individual-based modeling of bioenergetics and individual variability (feeding histroy, acclimation, energy reserves) in determining behavior, growth, development. and reproduction of crustacean zooplankton.

Current Research: We seek an REU student that has strong quantitative skills (e.g., statistics, math, or computer programming) and interests in undertaking a comparison of dissolved nutrients, phytoplankton, zooplankton and dissolved oxygen concentrations produced by a coupled biophysical model of the Oregon shelf ecosystem to observations of those same variables. The REU student would be involved in modifying an ecosystem model (in FORTRAN) to include other relevant state variables (e.g., chlorophyll), running the model, evaluating the output graphically and statistically, and comparing the model results to observations. The REU student would be co-supervised by Dr. Hal Batchelder and Dr. Yvette Spitz (both of CEOAS).

Rick Colwell Rick Colwell
1986 Ph.D., Microbiology, Virginia Tech
1982 M.S., Microbiology, Northern Arizona University
1977 B.A., Biology, Whitman College

Interests: Microbial ecology, subsurface microbiology, geomicrobiology, coupling of microbial rates and processes to physical and chemical parameters in the environment, sensing and monitoring of microbes, methods for sampling the earth's subsurface for microorganisms, bioremediation.

Current Research: Our geomicrobiology research involves using molecular ecology tools to study microorganisms that live in earth and aquatic environments and that are critical to the cycling of carbon. We are especially interested in the bacteria and archaea that alter molecules that contain a single carbon atom (e.g., methane, carbon dioxide). Our investigations include determining the types of cells present, the numbers of cells, their rate of metabolism, and how they are distributed with respect to physical and chemical properties of the earth system of interest. The ideal REU candidate will have some experience with microbiology and molecular biology techniques.

David Graham David Graham
PhD, MIT-Woods Hole Oceanographic Institution (Oceanography), 1987
MS, University of Rhode Island (Oceanography), 1980
BS, Florida Institute of Technology (Oceanography), 1975

Interests: Helium isotope and rare gas geochemistry; isotope and trace element chemistry of volcanic rocks from mid-ocean ridges, islands, and continental rifts, with applications to the dynamics of the Earth's upper mantle; the role of volatiles in petrogenesis.

Current Research: This project is a survey of the helium isotope and trace element composition of minerals (olivine, orthopyroxene and clinopyroxene) in upper mantle rocks exposed at the Earth's surface in several orogenic zones. The analytical aspects involve noble gas mass spectrometry of gases released by crushing and melting samples in ultra-high vacuum, quadrupole mass spectrometry of samples using in situ laser ablation, and petrographic description of rock thin sections. The rocks to be studied come from mantle exposures at Lherz (French Pyrenees), Lanzo (northern Italy), Ronda (southern Spain) and Horoman (Hokkaido, Japan). The REU student would be co-supervised by Dr. Dave Graham and Dr. Adam Kent (both of CEOAS).

Adam Kent Adam Kent
Ph.D. Geology and Geochemistry, The Australian National University, Canberra, Australia, 1995
B.Sc. (Hons) Geology , University of New England, Australia, 1989

Interests: High temperature geochemistry, Igneous petrology, In-situ elemental and isotopic analysis.

Current Research: This project will explore the use of laser-ablation ICP-MS (LA-ICP-MS) elemental analysis techniques for studies of ice cores. This technique involves using a newly installed laser ablation system to analyze small volumes of ice in-situ. This approach has the potential to provide high resolution records of elemental variations ice cores that relate to annual variations in dust fluxes, aerosol deposition from volcanic eruptions, and diffusive fluxes related to ice crystallization. The REU student will obtain hands on experience in sampling ice cores, developing analytical techniques using LA-ICP-MS, and in interpreting the resulting data. The REU student would be co-supervised by Dr. Adam Kent and Dr. Ed Brook (both of CEOAS).

Alexander Kurapov Alexander Kurapov

Interests: Oceanic data assimilation, coastal ocean modeling, wind-driven circulation, internal tides, mixing on the shelf

Current Research: Data Assimilation in Shelf Circulation Models

Jim Lerczak Jim Lerczak
Ph.D., Scripps Institution of Oceanography, UC-San Diego (Oceanography), 2000.
M.S., University of Washington (Physics), 1991.
B.A., Williams College (Physics), 1988.

Interests: Coastal physical oceanography including the study of internal tides, high-frequency internal waves, and circulation in the vicinity of fronts; estuarine oceanography including the dynamics that drive the three-dimensional circulation, the mechanisms that transport and disperse materials within estuaries, and the time response of estuaries to changes in forcing; physical/biological interactions which influence larval dispersal.

Current Research: Numerical modeling of the circulation within estuaries to determine how complexity in size and shape of the estuary determines the residence time of materials within the estuary and the exchange between the estuary and the open ocean.

Numerical modeling of the circulation over intertidal flats of a river delta to determine how river flow and tides control the morphology of intertidal flats and channel networks of a river delta.

Study the propagation and shoaling of large amplitude internal waves.

Ricardo Letelier Ricardo Letelier
PhD, University of Hawaii at Manoa (Oceanography), 1994
BS, Universidad de Concepcion, Chile (Marine Biology), 1988

Interests: Scales of response of marine pelagic microorganisms, populations, and communities to environmental perturbations; the role of these responses on biogeochemical cycles, primary productivity, nitrogen fixation, photosynthesis, chlorophyll passive (solar-induced) fluorescence; and the physical and chemical factors controlling these processes.

Current Research: Scales of variability of phytoplankton productivity in the coastal environments; the interpretation of phytoplankton passive fluorescence as measured from space, seasonal, and long-term changes in pelagic community structure in the North Pacific subtropical gyre with emphasis in phytoplankton production.

Phytoplankton scales of variability off the Oregon Coast

Remote Sensing Ocean Optics

Hawaii Ocean Time-series phytoplankton physiology and optics

Coastal Ocean Shelf Transport (COAST)

Adam Schultz Adam Schultz
PhD, University of Washington (Geophysics), 1986
MA, Cambridge University (St. Edmund's College), 1995
BSc, Brown University (Geology, Physics, Mathematics), 1979

Interests: I study the formation and evolution of the Earth's crust and mantle. One area of particular interest is in applying geophysical methods based on electromagnetic principles to image the continental and seafloor lithosphere and asthenosphere, to determine its physical and chemical state and to infer its geological history. I also study the physical, chemical, and geomicrobiological influences on sea floor hydrothermal processes. This work involves applying and developing geophysical inverse theory, image reconstruction, and time-series analysis to a range of problems, as well as investigating the tectonic, volcanic, solid Earth and oceanic tidal influences on subseafloor hydrology. In addition to working on theoretical and computational problems, my lab is heavily involved in the practical aspects of designing and operating new instruments for terrestrial and seafloor observatory programs.

Current Research: I direct NSF's EarthScope/USArray electromagnetic program (www.emscope.org). We operate a national network of permanent electromagnetic observatories that were designed in our lab, and each summer field season we also deploy a relocatable array of such stations across large regions of the continental US. As the arrays progress across the country, the data we produce is used to develop increasingly comprehensive images of the electrical conductivity structure of the North American crust and mantle. Conductivity is a very sensitive indicator of the presence of magmatic and aqueous fluids; it is sensitive to the temperature and compositional variations within different regions of the crust and mantle, and it is also an important tool for studying the distribution of volatile compounds within the Earth. We employ both professional and student crew members to install and operate our network of geoelectromagnetic ("magnetotelluric") instruments. Our magnetotelluric field program will be in high gear from late May-September, so there will be ample opportunities for undergraduates to participate in this important national program.

Karen Shell Karen Shell
PhD, University of California, San Diego (Scripps Institution of Oceanography), 2004
BS, Harvey Mudd College (physics), 1996

Interests: Climate dynamics; general circulation of the atmosphere; interactions between radiative transfer and the dynamics of the atmosphere and ocean; climate modeling

Current Research: Comparison of physical feedbacks (i.e., cloud feedbacks, ice-albedo feedbacks, and water vapor feedbacks) in different state-of-the-art computer models of the earth's climate

These feedbacks amplify or damp a climate response to changes in greenhouse gases or aerosols, and thus they influence the temperature change. The feedbacks appear to depend on the model configuration (for example, the details of ocean heat uptake or transport) as well as the specific forcing applied to the system. I have already begun these comparisons, but there is a huge amount of data available from simulations performed for the recent Intergovernmental Panel on Climate Change (IPCC) report. An REU student could extend these comparisons to new scenarios and sets of models. I have my own linux cluster, so there is also the potential to develop model experiments to test a climate sensitivity hypothesis. Regardless of the project, strong computer skills are a must. Students will need to know how to program (at least something like MATLAB) and be very comfortable in a UNIX/linux environment.

Simon de Szoeke Simon de Szoeke

Interests:Interactions between the atmosphere and ocean from turbulent scales (~1 meter) in the atmospheric boundary layer, to basin-wide ocean adjustment and global weather and climate patterns. The Earth's climate depends on feedbacks between the atmosphere and ocean: the sun's heating drives atmospheric wind, wind stress drives the ocean circulation, ocean circulation modifies the sea surface temperature, which affects the atmospheric wind. I am working on air-sea heat exchange in the tropics, particularly the role of clouds in the ocean heat balance.

REU Project: In 2008 I worked aboard a NOAA ship on a research cruise to the southeastern tropical Pacific. We observed the atmosphere there because we want to improve persistent climate model errors in the southeastern tropical Pacific. My colleagues and I measured surface meteorology from the ship and released weather balloons to measure atmospheric profiles of wind, temperature, and humidity. We employed a Doppler cloud radar, able to detect rain drop fall velocity and cloud air velocity. The summer project would be to process this unique radar data of drizzling marine stratocumulus clouds. My student and I will derive and refine algorithms from physics of cloud drops and radiative transfer, and use them to visualize and better understand clouds and rain.

Christoph Thomas Christoph Thomas
PhD (Dr. rer. nat.), University of Bayreuth (Micrometeorology), Bayreuth, Germany, 2005
MS (Dipl. Geooek.), University of Bayreuth (Geoecology), Bayreuth, Germany, 2001

Interests: Atmospheric turbulence, atmosphere-vegetation interaction, mixing in tall canopies (organised motion), transport in weak-wind stable boundary-layers, dynamics of the lower atmospheric boundary layer, trace gas exchange, ecosystem responses to climate change and feedback mechanisms, carbon-water coupling, acoustic remote sensing (SODAR-RASS), instrumentation

Current Research: Field test and evaluation of new state-of-the-art greenhouse gas flux analyzer--We will test a new analyzer prototype measuring the climate relevant greenhouse gases of carbon dioxide (CO2) and methane (CH4) in the air several times a second. Measuring methane concentrations at a high frequency suitable for flux measurements is challenging and a cutting edge research topic, so be among the first to see results. In addition to evaluating sensor performance, the CO2 and CH4 emissions will be compared across contrasting ecosystems in Oregon, specifically a Douglas Fir stand in the Coast Range, a Ponderosa Pine stand East of the Cascades in the Metolius area, and potentially also in a wetland area close to Corvallis. Results will be compared to and interpreted in concert with data sampled concurrently by established analyzers, so this is a chance to collect first-hand experience with a broad range of modern environmental sensors. The work will involve traveling to field sites in Oregon, assisting in setup/maintenance/ calibration/troubleshooting of the field equipment, data analysis with existing tools for spectral and time series analysis, and contributing to the final technical report, which will be published. If you enjoy field work, can work independently or with little supervision after initial training, have basic knowledge in handling gases and electronics, and already worked with Matlab, we would love to get you involved in this exiting research project!

Andrew Thurber Andrew Thurber
PhD, Scripps Institution of Oceanography, 2010
MSc, Moss Landing Marine Laboratories, 2005
BSc, Hawaii Pacific University, 2001

Interests: I am a benthic ecologist broadly interested in the functioning of marine ecosystems, with special emphasis on community and trophic ecology of polar and deep-sea habitat. My research focuses on the role of microbial communities in metazoan (animal) food webs and the implications this has for the cycling of energy and nutrients through sediments.

Current Research: To understand how the ocean functions, one must look beyond one study area, site, habitat, or even depth range. The aim of this upcoming summer's research is to use samples collected from deep-sea locations from across the globe to identify patterns of microbial community structure and function and increase our understanding of the largest but least understood habitat on earth. By using next-generation sequencing, bioinformatics, and community statistical approaches we will tease apart biogeographical patterns of deep-sea life.

Anne Tréhu Anne Tréhu
PhD, MIT-WHOI Joint program (Marine Geophysics), 1982
BA, Princeton University (Geosciences, summa cum laude), 1975

Interests: Application of geophysical data to geodynamic processes along plate boundaries; seismic data acquisition and processing.

Current Research: I am a seismologist interested in subduction zone earthquakes and their relationship to crustal structure in Cascadia and Chile. During summer 2013, student(s) will work with data from the ongoing Cascadia Initiative ocean bottom seismology program. Possible topics include relocating earthquakes that have occurred in the past 2 years on the continental margin to include OBS data and correlating the improved locations with crustal structure, comparing signal and noise characteristics of different instrument configurations, and determining shear wave velocity structure of the accretionary prism. There will be opportunities to participate in a cruise to recover or redeploy ocean bottom seismometers, including a cruise in July that will use the Jason Remotely Operated Vehicle (ROV) to recover instruments and observe their surroundings on the seafloor. At least one year of calculus-based physics and math is required. Courses in differential equations and linear algebra and experience programming in Matlab are recommended.

Anders Carlson Anders Carlson
2000, B.A. Augustana College, Geology & German
2002, M.S. Univ. of Wisconsin-Madison, Geology
2006, Ph.D. Oregon State Univ., Geology (Oceanography minor)
2007, Post Doc Woods Hole Oceanographic Inst.

Interests: My main research interest is the history of ice sheets and their impacts on climate and sea level. Recently, I have been focusing on longer-term (100's of kyr's) records of ice sheet fluctuations during relatively warm periods that are potentially analogous to Earth's future climate. I use marine sedimentological and geochemical records of ice sheet runoff to the ocean that provide important information on what a given ice sheet (Laurentide, Greenland, etc.) is doing on land. These records can then be compared with archives of climate forcing to better assess ice-sheet response(s) to a warming climate.

Current Research: Current research: Potential REU projects for the summer of 2013 include: 1) Assessing the relationship between the Greenland Ice Sheet and elevated atmospheric carbon dioxide during the late Pliocene using sediment (grain size, magnetic provenance) and geochemical (foraminifera stable isotopes and trace elements) marine records from south of Greenland to see if the Greenland Ice Sheet completely deglaciated under carbon dioxide levels similar to modern. 2) Investigating if the Laurentide Ice Sheet of Canada and northern United States completely deglaciated during "cold" interglacial periods of the last 800,000 years utilizing isotope and trace element geochemistry of planktonic foraminifera in the central North Atlantic to test the relative sensitivity of this ice sheet to changes in Earth's orbit around the Sun versus atmospheric greenhouse gas concentration. These are well established methodologies here at CEOAS that are being applied to new questions of paleo ice-sheet behavior and thus hold the potential for exciting results!

Lorenzo Ciannelli Lorenzo Ciannelli
2002. Ph.D. in Aquatic Fishery and Sciences, University of Washington, School of Aquatic and Fishery Sciences (SAFS), Seattle, WA.
1993. Laureate in Biology, Universita' Degli Studi di Napoli "Federico II", Italy.

Interests: My primary research focus is on fisheries oceanography and marine ecosystem ecology. I am interested in studying the causes of temporal and spatial variations of marine populations. Most of my work revolves around early life stages of fish, as variability at the population level is closely linked to egg, larval and juvenile survival in marine organisms. Through these investigations I combine quantitative analyses (i.e., mathematical and statistical modeling) with more field and experimentally oriented approaches.

Current Research: Coastal hypoxia can impact marine organisms in a variety of ways, affecting their physiology, behavior and ultimately survival. We are conducting a large experiment to quantify how dissolved oxygen and water temperature affect growth and survival of juvenile English sole and Dungeness crab in Oregon coastal waters. There are plenty of opportunities for an REU students to use our experimental set up to develop project looking at other behavioral or physiological traits of these organisms. One possibility for example is that of examining how water dissolved oxygen affects the respiratory structures of juvenile English sole, by looking at the gill structures. Likewise, it is possible to use the existing experimental design to look at behavioral traits (e.g., swimming abilities, reaction time to external stimuli). Students involved in this project will have an opportunity to develop their own ideas for research, work with live animals in laboratory, and go out at sea for collections of experimental animals.

Miguel Goni Miguel Goni
Post-Doctoral, Woods Hole Oceanographic Institution
PhD oceanography, University of Washington, 1992
BSc oceanography, University of Washington, 1986

Interests: Marine organic and stable isotope geochemistry. Sources, transport, transformations and fate of organic matter in marine and other aquatic environments. Role of organic matter in global biogeochemical cycles of major elements. Paleoceanographic and paleoclimate applications of organic biomarkers and their isotopic composition.

Current Research: Potential projects in Goni's lab include tracing the cycling of organic matter in a variety of coastal and oceanographic environments, ranging from rivers and estuaries in the Pacific Northwest and the South Atlantic Bight to the continental margins off Venezuela, Papua New Guinea and Hudson Bay. The interested student would learn to complete a variety of organic geochemical analyses, including determining the concentration and stable isotopic composition of carbon and nitrogen in water column and sediment samples. Depending on the interest of the student and the timing of the REU, there may be several possibilities to go out in the field and participate in sample collection.

Jennifer McKay Jennifer McKay
BSc, Geology, The Univ. of Western Ontario, 1988
MSc, Geology, The Univ. of Western Ontario
PhD, Earth and Ocean Sciences, Univ. of British Columbia, 2004

Interests: The use of stable isotopes and trace metals in paleoceanographic studies; understanding the marine biogeochemistry of silver and the use of silver as a paleoproductivity proxy.

Current Research: Marine paleoproductivity and trace metal biogeochemistry.In paleoceanographic studies the concentrations of biogenic materials (e.g., organic carbon, opal, and carbonate, as well as barite) in sediments are commonly used as proxies for marine primary productivity.The first of two REU projects will involve the analysis of various productivity proxies in surface and near-surface sediments collected from off the coast of Oregon, the Equatorial Pacific, and the Arabian Sea. The second REU project will involve the analysis of Ag and a suite of redox-sensitive trace metals (Re, Mo, Cd) in the same suite of cores as the first project. The objective is to improve our understanding of the biogeochemical cycling of Ag, notably determining what environmental conditions lead to the accumulation of Ag in marine sediments.The data from both projects, in conjunction with data from other ongoing studies, will help us determine whether or not sedimentary Ag, can be used as a paleoproductivity proxy.

Mary Santelmann Mary Santelmann
PhD, University of Minnesota (Ecology), 1988
MS, University of Michigan (Biology), 1980
BS, University of Minnesota (Botany), 1978

Interests: 1. Ecosystem response to human land use and management practices; use of alternative future scenarios combined with diverse evaluative approaches. 2. Environmental and anthropogenic influences on species composition and species richness in agricultural, urban and wetland ecosystems, including effects of landscape composition and pattern on native biodiversity. 3. Ecology and biogeochemistry of wetlands and riparian systems.

Current Research: Sea-level rise is a documented and ongoing result of climate change. Current wetland restoration plans have the potential to be effective for a longer time if managers have accurate location data for existing habitats and can develop an informed understanding of where these habitats may exist under future conditions. The undergraduate on this project would assist in field work to accurately ground-truth edges of the Coos Bay estuary that have been initially delineated using LiDAR. The field work will involve boat surveys as well as surveys from land (where points are accessible from shore). Objectives of the field surveys are to assess the accuracy of LiDAR, identify locations of different estuarine vegetation communities, and to characterize substrate, environmental conditions, and vegetation communities associated with key locations in the estuary that are important as habitat for juvenile salmonid species. The undergraduate will assist the graduate student on the project in conducting the ground-truthing surveys.

Ground truthing will be accomplished using a laser level, digital compass, and high-resolution Algiz Global Positioning System Total Station. In addition, at specified locations, the REU student will help collect data on water depth, temperature, salinity, and substrate (for example, areas where the shoreline is rocky, sandy, marsh, eelgrass beds, lined with rip-rap etc.). These data will be useful in building relationships between environmental conditions and vegetation communities which can then be used to develop species-habitat models for juvenile Pacific salmon.

Andreas Schmittner Andreas Schmittner
PhD, Climate & Environmental Physics, University of Bern, Switzerland, 1999
Diploma (Physics), University of Bremen, Germany, 1996

Interests: Using and developing numerical (computer) models of the Earth'sclimate system in order to understand past and present changes. Interactions between the different components of the climate system such as the ocean, atmosphere, cryosphere and biosphere.

Current Research: Interactions between climate, the ocean circulation and the marine ecosystem and carbon cycle. Rapid climate change associated with reorganisation of the ocean's thermohaline circulation during the last glacial period.

Kip Shearman Kip Shearman
1999. Ph.D., Oceanography, Oregon State University
1993. B.S., Aeronautical Engineering, University of Colorado

Interests: My research interest is the study of physical processes in coastal ocean. Big, small, long, short, high-frequency, low-frequency, stratified, unstratified, rotating, nonrotating, forced, unforced, surface, bottom, middle - I don't care. If it's physics and coastal, I'm interested. I am most interested in understanding the dynamics of the evolving structure of the density field over the shelf. How it is affected by external forcing and how it in turn affects the circulation within the coastal ocean. My approach is observational, using innovative sampling techniques - such as Autonomous Underwater Vehicles (AUVs) - coupled with modeling and analysis, to explain fundamental physical processes.

Current Research: Northwest Australian Shelf Dynamics Experiment.Autonomous Underwater Vehicle (AUV) Surveys at the Martha's Vineyard Coastal Observatory.

Observations of Surface and Bottom Water Temperature on the Oregon Shelf through Industry-Academic Collaboration.

Coastal Mixing and Optics Experiment Moored Array.

Joe Stoner Joe Stoner
1995. Ph.D., Resources Minérales, Université du Québec à Montréal
1991. M.S., Geology, University of Florida
1987. B.S., Geology, University of Florida

Interests: Sediments magnetism including paleomagnetism, environmental magnetism, geomagnetism, sedimentology, stratigraphy, paleoclimatology, paleoceanography.

Current Research: Holocene Paleo- and Environmental Magnetic Variability derived from Alaskan Fjord Sediments

This project would involve analyses of a pair of piston cores from Lynn Canal in the Gulf of Alaska, which have the potential to provide a unique look at environmental and paleomagnetic variability in the North Pacific throughout the Holocene. The two cores, EW0408 55JC and EW0408 57JC, were collected from basically the same location: one is from the middle of a sediment drift, while the other is from the perimeter. Although the cores are similar in length (~15.5 m and 18 m, respectively), preliminary radiocarbon dates indicates that 55JC extends back ~17,700 ybp, while 57JC extends back only ~1,750 ybp. Hence, these cores provide a sedimentary record extending back to local deglaciation, paired with an ultra-high-resolution (~1cm/yr) look at the late Holocene from the same location. We propose to have an interested undergraduate student perform point-source magnetic susceptibility measurements, and u-channel natural and artificial remnant magnetism measurements on these cores. These measurements will be used to establish the relationship between 55JC and 57JC, as well as to correlate these records to other cores in the region. Once robust chronologies have been established, the paleomagnetic directional and intensity records for the Gulf of Alaska cores can hopefully be compared to other global stacks. Paleomagnetic variability in the North Pacific is presently poorly constrained, due to a paucity of records, and the data obtained from these cores have the potential to provide an important contribution to the understanding of global geomagnetic behavior.

Frank J. Tepley III Frank J. Tepley III
PhD, University of California, Los Angeles (Geochemistry), 1999
BS, California State University, Northridge (Geology), 1991

Interests: Use of compositional variations and in situ Sr-isotopes in plagioclase feldspars in arc rocks and mid-ocean ridge basalts to trace the effects of magma mixing and crustal contamination; use of U-series disequilibria (U, Th, Pa, Ra) in whole rocks and minerals to decipher the sources of slab-derived components in arc magmas, and the timescales and character of melting processes within the mantle wedge beneath ocean islands and continental arcs; use of major- and trace-element diffusional profiles in mineral phases to determine the time scales of magma mixing processes occurring in sub-volcanic reservoirs.

Current Research: In collaboration with Anita Grunder in the Department of Geoscience and Ph.D. graduate student BJ Walker, I am working in the Aucanquilcha Volcanic Cluster (AVC) in northern Chile, to understand the development and evolution of this magmatic system over time. The AVC has erupted lavas of andesitic and dacitic composition for the last 11 Ma, and the lavas and crystals within preserve a time-transgressive record of magmatic processes that document the long-term evolution of this subduction zone volcanic center. One aspect of this system that we want to explore more fully is the role that volatile species, such as Cl, F, S and H2O, play in its development and their relationship to porphyry mineralization. To this end, we intend to evaluate these species in various mineral phases, such as biotite, apatite and amphibole, through an extensive electron microprobe study. The REU student will receive guidance in petrographic and microprobe analysis for a representative suite of samples. The student will focus on analyzing apatite and biotite to test and further our understanding based on amphibole analyses.

George Waldbusser George Waldbusser
2008, Ph.D. University of Maryland (Biological Oceanography)
2002, M.Sc. University of Connecticut (Biological Oceanography)
1999, B.Sc. St. John's University, NY (Environmental Science)

Interests: Ocean Acidification Impacts on Shellfish, and Benthic Ecology and Biogeochemistry.

Current Research: Dissolution dynamics of oyster shell in Oregon estuaries. Oyster shell provides critical habitat for recruitment of new individuals to the population. However, little is known about the the lifetime of oyster shell in estuaries and the critical thresholds of population size, recruitment rates, and environmental conditions that ensure that the rate of new shell accretion exceeds loss. The project would entail measuring rates of shell dissolution and quantifying physical and geochemical characteristics of shell material.

Rob Wheatcroft Rob Wheatcroft
PhD, University of Washington (Oceanography), 1990
MS, University of Georgia (Geology), 1984
BA, The College of Wooster (Geology), 1981

Interests: Interdependence between sedimentological and biological processes in the marine environment; foraging ecology of deposit feeders; continental shelf processes.

Current Research: The delivery and fate of particulate organic carbon on active continental margins. This research is part of a large project exploring the source-to-sink transport of particulate organic carbon along the US West Coast. The student will participate in a 12-day cruise on the RV Wecoma during which sediment cores (box, kasten and piston) will be collected offshore of several major rivers from central Oregon to central California. Image processing of digital x-radiographs will be used to develop a record of flood stratigraphy over the past several centuries that can potentially be related to hydroclimatic forcing (e.g., ENSO, Pacific Decadal oscillation).