Oceanography and Atmospheric Sciences and Meteorology Commons^™

Production And Fate Of Transparent Exopolymer Particles In The Ocean, Oliver Wurl, Lisa Miller, Svein Vagle

OES Faculty Publications

The production and fate of transparent exopolymer particles (TEP) have been investigated in various oceanic regions (tropical, temperate, and polar), from the sea surface microlayer (SML) to the deep ocean. Accumulation of TEP within the mixed layer was observed even in the absence of phytoplankton blooms, indicating abiotic processes are important in TEP production. The abiotic TEP aggregation rates measured in the tropical and temperate North Pacific and the Arctic Ocean averaged between 8 and 12 μmol C L^-1 d-¹. Depth profiles from under sea ice in the Arctic revealed the highest TEP concentrations, potentially released by …

Environmental Influences On Juvenile Fish Abundances In A River-Dominated Coastal System, Laure Carassou, Brian Dzwonkowski, Frank J. Hernandez, Jr., Sean P. Powers, William M. Graham, Kyeong Park, John Mareska

University Faculty and Staff Publications

We investigated the influence of climatic and environmental factors on variations in juvenile abundances of marine fishes in a river-dominated coastal system of the north-central Gulf of Mexico, where an elevated primary productivity sustains fisheries of high economic importance. Fish were collected monthly with an otter trawl at three stations near Mobile Bay from 1982 to 2007. Fish sizes were used to isolate juvenile stages within the data set, and monthly patterns in juvenile fish abundance and size were then used to identify seasonal peaks for each species. The average numbers of juvenile fish collected during these seasonal peaks in …

Concept Tests For A New Wire Flying Vehicle Designed To Achieve High Horizontal Resolution Profiling In Deep Water, Chris Roman, Dave Hebert

Graduate School of Oceanography Faculty Publications

Efficiently profiling the water column to achieve both high vertical and horizontal resolution from a moving vessel in deep water is difficult. Current solutions, such as CTD tow-yos, moving vessel profilers, and undulating tow bodies, are limited by ship speed or water depth. As a consequence, it is difficult to obtain oceanographic sections with sufficient resolution to identify many relevant scales over the deeper sections of the water column. This paper presents a new concept for a profiling vehicle that slides up and down a towed wire in a controlled manner using the lift created by wing foils. The wings …

Spatial And Temporal Variations In The Air-Sea Carbon Dioxide Fluxes Of Florida Bay, Christopher Michael Dufore

USF Tampa Graduate Theses and Dissertations

The flux of CO2 between the ocean and the atmosphere is an important measure in determining local, global, and regional, as well as short term and long term carbon budgets. In this study, air-sea CO2 fluxes measured using a floating chamber were used to examine the spatial and temporal variability of CO2 fluxes in Florida Bay. Measurements of dissolved inorganic carbon and total alkalinity obtained concurrently with chamber measurements of CO2 flux allowed calculation of ΔpCO2 from flux measurements obtained at zero wind velocity. Floating chamber measurements of ΔpCO2 were subsequently coupled with wind speed data to provide a simple …

Field Ecology Patterns Of High Latitude Coral Communities, Kristi A. Foster

HCNSO Student Theses and Dissertations

Some climate models predict that, within the next 30-50 years, sea surface temperatures (SSTs) will frequently exceed the current thermal tolerance of corals (Fitt et al. 2001; Hughes et al. 2003; Hoegh-Guldberg et al. 2007). A potential consequence is that mass coral bleaching may take place (i) during warm El Niño-Southern Oscillation (ENSO) events which are predicted to occur in some regions more frequently than the current 3-7 year periodicity (Hoegh-Guldberg 1999; Sheppard 2003) or (ii) perhaps as often as annually or biannually if corals and their symbionts are unable to acclimate to the higher SSTs (Donner et al. 2005, …

Climate Change In The Piscataqua/Great Bay Region: Past, Present, And Future, Cameron P. Wake, Elizabeth Burakowski, Eric Kelsey, Katharine Hayhoe, Anne Stoner, Chris Watson, Ellen Douglas

The Sustainability Institute Publications

Earth ’s climate changes. It always has and always will. However, an extensive body of scientific evidence indicates that human activities are now a significant force driving change in the Earth’s climate system. This report describes how the climate of the Piscataqua/Great Bay region of coastal New Hampshire in the United States has changed over the past century and how the future climate of the region will be affected by human activities that are warming the planet.

Overall, the region has been getting warmer and wetter over the last century, and the rate of change has increased over the last …

Consistency In Statistical Moments As A Test For Bubble Cloud Clustering, Thomas C. Weber, Anthony P. Lyons, David L. Bradley

Center for Coastal and Ocean Mapping

Frequency dependent measurements of attenuation and/or sound speed through clouds of gas bubbles in liquids are often inverted to find the bubble size distribution and the void fraction of gas. The inversions are often done using an effective medium theory as a forward model under the assumption that the bubble positions are Poisson distributed (i.e., statistically independent). Under circumstances in which single scattering does not adequately describe the pressure field, the assumption of independence in position can yield large errors when clustering is present, leading to errors in the inverted bubble size distribution. It is difficult, however, to determine the …

Sustainability And Climate Models For The Intermountain West: An Annotated Bibliography, Marianne A. Buehler, William E. Brown Jr.

Brookings Mountain West Publications

This resource on climate models and sustainability in the Intermountain West, a region that includes the states of Arizona, Colorado, Idaho, Nevada, New Mexico, and Utah, is a collaborative effort between the UNLV Libraries (http://library.unlv.edu/) and Brookings Mountain West (http://brookingsmtnwest.unlv.edu/).

The selected citations include academic, government, and non-profit information that highlight ongoing research on climate models and sustainability efforts in the region. The websites, government studies, independent reports, scholarly articles, and media reports reflect the diversity and complexity of climate change and sustainability issues in a region that contains widely varying ecosystems. The Intermountain West, with its deserts, basins, mountains, …

Lsuhsc Facilities Biweekly Update: November 2011, Lsuhsc Property And Facilities Management

LSUHSC Facilities Biweekly Updates: 2011

LSUHSC Facilities Biweekly Updates from November 4 and 18, 2011.

These updates describe damage and a timeline of repairs at the LSU Health Sciences Center - New Orleans campus due to Hurricane Katrina which made landfall August 29, 2005.

Lsuhsc Facilities Daily Updates: November 2011, Lsuhsc Property And Facilities Management

LSUHSC Facilities Daily Updates: 2011

LSUHSC Facilities Daily Updates from November 2011.

On the original documents, the daily update for Tuesday, November 8, 2011 was misdated as Tuesday, November 9, 2011.

These updates describe damage and a timeline of repairs at the LSU Health Sciences Center - New Orleans campus due to Hurricane Katrina which made landfall August 29, 2005.

2011 Aquatic Weed Surveys In Timothy Lake, Lake Harriet And North Fork Reservoir : Final Report, Mark D. Sytsma, Vanessa Howard Morgan

Center for Lakes and Reservoirs Publications and Presentations

Portland General Electric (PGE) was issued a new license by the Federal Energy Regulatory Commission (FERC) for the continued operation and maintenance of the Clackamas River Hydroelectric Project No. 2195 (Project) on December 21, 2010. This Project is located on both the lower 16 miles of Oak Grove Fork of the Clackamas River (Oak Grove Fork) and the mainstem of the Clackamas River in Clackamas County, Oregon. The effects of relicensing this Project were addressed in the Final Environmental Impact Statement (FEIS) completed in December 2006 and included the issue of invasive aquatic weed species. The term “aquatic weed” is …

Comparing Ingenio Santa Rosa Precipitation Data To Trmm And Hydroestimator Data For El Nino And Normal Years In Panama, Tiffany Keeton

Von Braun Symposium Student Posters

No abstract provided.

Geospatially Detecting Saccharum Spontaneum: An Invasion Of The Panama Canal Watershed, Casey L. Calamaio

Von Braun Symposium Student Posters

No abstract provided.

Analysis Of Solar Lyman-Alpha Backscatter Radiation In The Heliosphere, Brian Fayock

Von Braun Symposium Student Posters

No abstract provided.

Investigation Of Turbulence Transport In The Heliosphere, Lauren Kahre

Von Braun Symposium Student Posters

No abstract provided.

Environmental Prediction In Canadian Cities, James Voogt

Geography & Environment Presentations

No abstract provided.

Effects Of Climate Change On Spring Ecosystem Hydroecology As A Guide To Developing Alternative Water Policies, Scott Mensing, Saxon E. Sharpe, Scott Bassett, Don Sada, Jim Thomas

Climate Change Seminar Series (NNE)

Hydroecology: the interface of ecological systems and water which combines the scientific disciplines of hydrology and ecology

Goal: evaluate the hydrologic and climate history using pollen, loss on ignition, total inorganic carbon, and invertebrates from spring sediments in Spring Valley, Eastern Nevada and Snake Valley, Western Utah

Development Of A Passive Sampler For Gaseous Mercury, Mae S. Gustin, Seth N. Lyman, P. Kilner, E. Prestbo

USU Uintah Basin Faculty Publications

Here we describe work toward development of the components of a cost effective passive sampling system for gaseous Hg that could be broadly deployed by nontechnical staff. The passive sampling system included an external shield to reduce turbulence and exposure to precipitation and dust, a diffusive housing that directly protects the collection surface during deployment and handling, and a collection surface. A protocol for cleaning and deploying the sampler and an analytical method were developed. Our final design consisted of a polycarbonate external shield enclosing a custom diffusive housing made from expanded PTFE tubing. Two collection surfaces were investigated, gold …

Green Marine Construction, Sylvain Pioch, Kirk Kilfoyle, Harold Levrel, Richard E. Spieler

Marine & Environmental Sciences Faculty Articles

The oceans incorporate three-quarters of the Earth's surface, and most of humanity lives in coastal regions. For example, more than half of the total U.S. population presently lives in coastal areas, and the coastal population is projected to increase by 7 million between now and 2015. Similar projections can be made for other developed countries many of which depend on the coastal zone as a major source of tourism-related income. The long-term ecological health and sustainability of the marine and coastal environments are obviously at risk. Coastal projects such as beach re-nourishment, housing developments, and pipe-line, harbor and marina construction …

Circulation, Vol. 17, No. 1, Center For Coastal Physical Oceanography, Old Dominion University, Chester E. Grosch

CCPO Circulation

Fall 2011 issue of CCPO Circulation featuring article "Langmuir Circulations" by Dr. Chester E. Grosch

Droughtscape, Fall 2011, Kelly Smith

DroughtScape: Quarterly Newsletter of the National Drought Mitigation Center (2007–2023)

Drought Preparedness Community Options

Drought Likely to Persist, Intensify Across South

Database Will Help Planners Find Options

Impacts: Ag Losses, Fire, Water Restrictions

NDMC Welcomes International Visitors

New Drought Impact Reporter Online

Sim-Drought, Available Now at Select Agencies

Another Dimension From Lidar – Obtaining Foliage Density From Full Waveform Data, Thomas Adams, Peter Beets, Christopher Parrish

Center for Coastal and Ocean Mapping

LiDAR tells the user where surfaces are, not what they are. In this study we investigate the potential for waveform LiDAR to provide more information on the nature of the returns over forestry. Waveform LiDAR was acquired for ten Pinus radiata plots in a New Zealand plantation, along with comprehensive leaf area sampling in 2m vertical bands. The decay rate of each waveform peak was shown to be a useful tool for estimating foliage density, and has potential for identifying regions containing ground and understorey. Leaf Area Density (LAD) is an expression of foliage density per unit height, and a …

Analysis Of Potential Climate Change In Putnam County, Julia Roell, Peter Konieczny, Rudra Vishweshwar, Ben Harsha, Weiqing Zhang, Jim Mills

Student Research

During fall semester, 2011, five students in HONR 191, Science Research Fellows, were charged with determining if there was evidence of local climate change over the last 150 years as part of the larger global climate change phenomena the Earth is currently experiencing. The study consisted of two parts: one, an analysis of local climate data (temperature and precipitation) over the last 150 years, and two, an analysis of local tree rings.

Tree rings have the potential to provide information on local climate change as annual tree ring width is, in part, a function of temperature, precipitation, and nutrient availability. …

A Google Earth-Based Framework For Visualization Of The Chesapeake Bay Operational Forecast System, Gary Lawson

Computational Modeling & Simulation Engineering Theses & Dissertations

For the persons who live near and travel the waters of the Chesapeake Bay, the data provided by the Chesapeake Bay Operational Forecast System (CBOFS) is invaluable. The information provided includes measurements and forecasts of surface wind velocity, water current velocity, salinity levels, water level, and temperature. Currently, this information is freely available on the CBQ_FS website hosted by the National Oceanographic and Atmospheric Administration (NOAA). It is offered as Nowcast, measured data, and Forecast data and is visualized using 2D images which describe a subset of the data in an easy to read chart. However, if the data were …

Circulation Of The Western Antarctic Peninsula: Implications For Biological Production, Maria Andrea Piñones Valenzuela

OES Theses and Dissertations

The western Antarctic Peninsula (wAP) continental shelf is characterized by large persistent populations of Antarctic krill ( Enphausia superba) and by regions of enhanced concentrations of marine mammals and other predators (hot spots). This study focused on understanding the role of ocean circulation in providing retention/connectivity of wAP Antarctic krill populations and in maintaining biological hot spot regions. Numerical Lagrangian particle tracking simulations obtained from the Regional Ocean Modeling System (ROMS) configured for the wAP region provided quantitative estimates of retention, immigration and emigration from the wAP continental shelf. Additional simulations with a one-dimensional temperature-dependent growth model for krill …

Effect Of Reworking And Bioturbation On Sedimentary Reactive Iron Within A Microtidal Estuary, Amy Kathleen Pitts

OES Theses and Dissertations

Mixed redox conditions in sediments due to physical reworking may allow for enhanced remineralization of refractory organic matter due to Fe(III) redox cycling. In part this may occur because easily reducible iron oxides can be used by heterotrophic bacteria to remineralize the organic carbon. This phenomena has been observed in bioturbated sediments and in areas where physical factors (such as strong bottom currents) constantly rework the sediments. To specifically determine the effects of physical reworking and bioturbation on concentrations of easily reducible iron oxides, reactive iron concentrations were measured in surface sediments taken from two contrasting sites in the York …

Lsuhsc Facilities Biweekly Update: October 2011, Lsuhsc Property And Facilities Management

LSUHSC Facilities Biweekly Updates: 2011

LSUHSC Facilities Biweekly Updates from October 7 and 21, 2011.

These updates describe damage and a timeline of repairs at the LSU Health Sciences Center - New Orleans campus due to Hurricane Katrina which made landfall August 29, 2005.

Lsuhsc Facilities Daily Updates: October 2011, Lsuhsc Property And Facilities Management

LSUHSC Facilities Daily Updates: 2011

LSUHSC Facilities Daily Updates from October 2011.

These updates describe damage and a timeline of repairs at the LSU Health Sciences Center - New Orleans campus due to Hurricane Katrina which made landfall August 29, 2005.

Quantification Of Nitrate Sources And Sinks Using A Water Quality Network In Morro Bay Estuary, California, Johanna Nadia Jean Weston

Master's Theses

Using an instrumented water quality network in Morro Bay Estuary, California from 2007 to 2010 (15 min sampling frequency), this study addressed the two objectives of constructing a nitrate budget and assessing the influence of sampling frequency on water quality parameters. These two objectives led to the submission of an original report of research (Appendix A) and a note (Appendix B) to peer-reviewed journals.

The first objective was to characterize the high spatial and temporal variation in physical parameters and nitrate concentrations and to construct a nitrate budget quantifying sources and sinks of nitrate from the ocean, streams, and groundwater, …

Limnological Assistance For Lake Mead National Recreation Area: Quarterly Report, Period Ending September 30, 2011, Margaret N. Rees

Limnological Studies

Project 1

• Technical assistance with the implementation of the Interagency Monitoring Action Plan (I-MAP) for Quagga Mussels is ongoing. During this quarter, processing of all 2010 juvenile/adult samples was completed; remaining analyses are underway. The project team assisted NPS with 2011 collections.
• A final report on Veliger abundance and settlement at different depths of Lake Mead is in preparation for delivery at the end of November 2011; sample analysis continues for Growth of adult quagga mussels within Las Vegas Wash/Las Vegas Bay with report delivery planned for the end of November 2011.
• The Interagency Quagga Mussel Meeting was held on …