Comparison Of The X-Track Altimetry Estimated Currents With Moored Adcp And Hf Radar Observations On The West Florida Shelf,
2012
University of South Florida
Comparison Of The X-Track Altimetry Estimated Currents With Moored Adcp And Hf Radar Observations On The West Florida Shelf, Yonggang Liu, Robert H. Weisberg, Stefano Vignudelli, Laurent Roblou, Clifford R. Merz
Yonggang Liu
The performance of coastal altimetry over a wide continental shelf is assessed using multiple-year ocean current observations by moored Acoustic Doppler Current Profilers (ADCP) and high-frequency (HF) radar on the West Florida Shelf. Across-track, surface geostrophic velocity anomalies, derived from the X-TRACK along-track sea level anomalies are compared with the near surface current vector components from moored ADCP observations at mid shelf. The altimeter-derived velocity anomalies are also directly compared with the HF radar surface current vector radial components that are aligned perpendicular to the satellite track. Preliminary results indicate the potential usefulness of the along-track altimetry data in contributing …
Seasonal Variability On The West Florida Shelf,
2012
University of South Florida
Seasonal Variability On The West Florida Shelf, Yonggang Liu, Robert H. Weisberg
Yonggang Liu
The seasonal variations of the West Florida Continental Shelf (WFS) circulation and sea level are described using observations of velocity from an array of moored acoustic Doppler current profilers and various ancillary data. With record lengths ranging from 3 years to over a decade, a robust seasonal cycle in velocity is found, which varies across the shelf in a dynamically sensible way. Over most of the inner shelf these seasonal variations are primarily in response to local forcing, through Ekman-geostrophic spin-up, as previously found for the synoptic scale variability. Thus the inner shelf circulation is predominantly upwelling favorable from fall …
Where Is The Rain-On-Snow Zone In The West-Central Washington Cascades?: Monte Carlo Simulation Of Large Storms In The Northwest,
2012
Portland State University
Where Is The Rain-On-Snow Zone In The West-Central Washington Cascades?: Monte Carlo Simulation Of Large Storms In The Northwest, Matthew John Brunengo
Dissertations and Theses
Rain-on-snow (ROS) occurs when warm, wet air moves into latitudes and/or elevations having vulnerable snowpacks, where it can alter water inputs to infiltration, runoff and erosion. The Pacific Northwest is particularly susceptible: winter storms off the Pacific cause locally heavy rain plus snowmelt almost annually, and disastrous flooding and landsliding intermittently. In maritime mountainous terrain, the effects seem more likely and hydrologically important where warm rains and seasonal snowpacks are liable to coincide, in middle elevations. Several questions arise: (1) In the PNW, does ROS affect the long-term frequency and magnitude of water delivery to the ground, versus total precipitation …
High-Order Central Finite-Volume Schemes For Atmospheric Modeling,
2012
University of Texas at El Paso
High-Order Central Finite-Volume Schemes For Atmospheric Modeling, Kiran Kumar Katta
Open Access Theses & Dissertations
Atmospheric numerical modeling has been going through drastic changes over the past decade, mainly to utilize the massive computing capability of the petascale systems. This obliges the modelers to develop grid systems and numerical algorithms that facilitate exceptional level of scalability on these systems. The numerical algorithms that can address these challenges should have the local properties such as the high on-processor operation count and minimum parallel communication i.e., high parallel efficiency. They should also satisfy the following properties such as inherent local and global conservation, high-order accuracy, geometric flexibility, non-oscillatory advection and positivity preservation properties. The goal of this …
Power Estimates Associated With Internal Tides From The Monterey Bay Area,
2012
Florida Institute of Technology
Power Estimates Associated With Internal Tides From The Monterey Bay Area, Steven M. Jachec
Ocean Engineering and Marine Sciences Faculty Publications
Numerical modeling has proven to be a useful method for simulating internal tides within the coastal ocean. Monterey Bay is a location that experiences energetic semidiurnal internal tides, and they are pronounced within Monterey Submarine Canyon. Numerical simulations and field measurements indicate that the baroclinic energy fluxes there are spatially variable, leading to locations of positive and negative baroclinic energy flux divergences. Results derived from a SUNTANS (Stanford Unstructured Nonhydrostatic Terrain-following Adaptive Navier-Stokes Simulator) model simulation show that Monterey Submarine Canyon’s baroclinic power is net dissipative (–8.3 MW). However, sources and sinks exist throughout the canyon, and they permeate the …
Catastrophe And The Life Span Of Coral Reefs,
2012
Florida Institute of Technology
Catastrophe And The Life Span Of Coral Reefs, Richard B. Aronson, William F. Precht, Ian G. Macintyre, Lauren T. Toth
Ocean Engineering and Marine Sciences Faculty Publications
A strong earthquake in the western Caribbean in 2009 had a catastrophic impact on uncemented, unconsolidated coral reefs in the central sector of the shelf lagoon of the Belizean barrier reef. In a set of 21 reef sites that had been observed prior to the earthquake, the benthic assemblages of 10 were eradicated, and one was partially damaged, by avalanching of their slopes. Ecological dynamics that had played out over the previous 23 years, including the mass mortalities of two sequentially dominant coral species and a large increase in the cover of an encrusting sponge, were instantaneously rendered moot in …
Ua94/6/10 Student / Alumni Personal Papers Wku Carl Ellis,
2012
Western Kentucky University
Ua94/6/10 Student / Alumni Personal Papers Wku Carl Ellis, Wku Archives
WKU Archives Collection Inventories
Scientific notebooks used by Carl Ellis during his years at WKU.
Orange Matters,
2012
Syracuse University
Orange Matters, Tom Raynor, Jay Cox, Eileen T. Jevis, Christine Yackel, Susan Parks
Syracuse University Magazine
No abstract provided.
A Conceptual Model Of An Arctic Sea,
2012
Old Dominion University
A Conceptual Model Of An Arctic Sea, P. St-Laurent, F. Straneo, D. G. Barber
CCPO Publications
We propose a conceptual model for an Arctic sea that is driven by river runoff, atmospheric fluxes, sea ice melt/growth, and winds. The model domain is divided into two areas, the interior and boundary regions, that are coupled through Ekman and eddy fluxes of buoyancy. The model is applied to Hudson and James Bays (HJB, a large inland basin in northeastern Canada) for the period 1979-2007. Several yearlong records from instruments moored within HJB show that the model results are consistent with the real system. The model notably reproduces the seasonal migration of the halocline, the baroclinic boundary current, spatial …
State Of The River Report For The Lower St. Johns River Basin, Florida: Water Quality, Fisheries, Aquatic Life, And Contaminants 2012,
2012
University of North Florida
State Of The River Report For The Lower St. Johns River Basin, Florida: Water Quality, Fisheries, Aquatic Life, And Contaminants 2012, Environmental Protection Board, City Of Jacksonville, University Of North Florida, Jacksonville University
State of the River Report
No abstract provided.
National Coral Reef Institute 2012,
2012
Nova Southeastern University
National Coral Reef Institute 2012, Nova Southeastern University
Halmos College of Natural Sciences and Oceanography Course Catalogs
No abstract provided.
Acoustic Sensing Of Gas Seeps In The Deep Ocean With Split-Beam Echosounders,
2012
University of New Hampshire, Durham
Acoustic Sensing Of Gas Seeps In The Deep Ocean With Split-Beam Echosounders, Thomas C. Weber, Kevin W. Jerram, Larry A. Mayer
Center for Coastal and Ocean Mapping
When in the form of free gas in the water column, methane seeps emanating from the seabed are strong acoustic targets that are often detectable from surface vessels using echo sounders.In addition to detecting that a seep is present at some location, it is also desirable to characterize the nature of the seep in terms of its morphology and flux rates. Here, we examine how much we can learn about seeps in the deep (> 1000 m) northern Gulf of Mexico using narrow-band split-beam echo sounders operating at fixed frequencies (18 kHz and 38 kHz).Methane seeps in this region are …
Standardized Precipitation Index: User Guide,
2012
University of Nebraska - Lincoln
Standardized Precipitation Index: User Guide, Mark Svoboda, Michael Hayes, Deborah Wood
Drought Mitigation Center: Faculty Publications
Over the years, there has been much discussion on what drought indices should be used in a particular climate and for what application. Many drought definitions and indices have been developed and attempts have been made to provide some guidance on this issue. With this in mind, the Interregional Workshop on Indices and Early Warning Systems for Drought was organized and held at the University of Nebraska-Lincoln, United States of America, from 8 to 11 December 2009. It was jointly sponsored by the School of Natural Resources (SNR) of the University of Nebraska, the United States National Drought Mitigation Center …
Drought Monitoring:
Historical And Current
Perspectives,
2012
University of Nebraska - Lincoln
Drought Monitoring: Historical And Current Perspectives, Michael J. Hayes, Mark D. Svoboda, Brian D. Wardlow, Martha C. Anderson, Felix Kogan
Drought Mitigation Center: Faculty Publications
Drought is a normal, recurring feature of climate throughout the world, with characteristics and impacts that can vary from region to region. Figure 1.1 illustrates the regular occurrence of drought within the United States between 1895 and 2010 with approximately 14% of the country, on average (plotted by black dotted line), experiencing severe to extreme drought conditions during any given year. Drought conditions can persist in a region for several years, as occurred in the United States in the 1930s, 1950s, and early 2000s, and tree ring and other proxy records confirm that multiple-year droughts are part of the long-term …
Future Opportunities And
Challenges In Remote
Sensing Of Drought,
2012
University of Nebraska - Lincoln
Future Opportunities And Challenges In Remote Sensing Of Drought, Brian D. Wardlow, Martha C. Anderson, Justin Sheffield, Bradley D. Doorn, James P. Verdin, Xiwu Zhan, Matthew Rodell
Drought Mitigation Center: Faculty Publications
The value of satellite remote sensing for drought monitoring was first realized more than two decades ago with the application of Normalized Difference Vegetation Index (NDVI) data from the Advanced Very High Resolution Radiometer (AVHRR) for assessing the effect of drought on vegetation, as summarized by Anyamba and Tucker (2012, Chapter 2). Other indices such as the Vegetation Health Index (VHI) (Kogan, 1995) were also developed during this time period and applied to AVHRR NDVI and brightness temperature data for routine global monitoring of drought conditions. These early efforts demonstrated the unique perspective that global imagers like AVHRR could provide …
Microwave Remote
Sensing Of Soil Moisture
Science And Applications,
2012
California Institute of Technology
Microwave Remote Sensing Of Soil Moisture Science And Applications, Son V. Nghiem, Brian D. Wardlow, David Allured, Mark Svoboda, Doug Lecomte, Matthew Rosencrans, Steven K. Chan, Gregory Neumann
Drought Mitigation Center: Faculty Publications
Soil moisture is a fundamental link between global water and carbon cycles and has major applications in predicting natural hazards such as droughts and floods (National Research Council, 2007). From precipitation data, soil wetness can be estimated by hydrological land-surface models. In the United States, preliminary precipitation data are based on measurements gathered from many active stations nationwide each month, and it takes 3–4 months to assemble final, quality-controlled data. In the western United States, some climate divisions may have no stations reporting in a particular month or may lack first- or second-order stations, and significant blockages by mountains limit …
Climate Divisions For Alaska Based On Objective Methods,
2012
University of Alaska Fairbanks
Climate Divisions For Alaska Based On Objective Methods, Peter A. Bieniek, Uma S. Bhatt, Richard L. Thoman, Heather Angeloff, James Partain, John Papineau, Frederick Fritsch, Eric Holloway, John E. Walsh, Christopher Daly, Martha Shulski, Gary Hufford, David F. Hill, Stavros Calos, Rudiger Gens
Drought Mitigation Center: Faculty Publications
Alaska encompasses several climate types because of its vast size, high-latitude location, proximity to oceans, and complex topography. There is a great need to understand how climate varies regionally for climatic research and forecasting applications. Although climate-type zones have been established for Alaska on the basis of seasonal climatological mean behavior, there has been little attempt to construct climate divisions that identify regions with consistently homogeneous climatic variability. In this study, cluster analysis was applied to monthly-average temperature data from 1977 to 2010 at a robust set of weather stations to develop climate divisions for the state. Mean-adjusted Advanced Very …
The Arctic Game,
2012
University of Denver
The Arctic Game, Sarah E. Nuernberger
Electronic Theses and Dissertations
Since outsiders first visited the Arctic, they have believed in man's ability to conquer the region. Today's Arctic conquest is not one of heroic exploration, but rather one of ownership and exploitation. This paper illustrates contestation in the Arctic through the metaphor of a game, with attendant prizes, players, and rules. It focuses on how to prevent the future destruction of the Arctic given the interactions of the Arctic's landscape, prizes, players, and current management frameworks. In the wake of renewed resource exploitation and escalating climate change impacts, the current frameworks and mindsets are inadequate to support the precarious balance …
Interannual And Regional Differences In Krill And Fish Prey Quality Along The Western Antarctic Peninsula,
2012
College of William and Mary - Virginia Institute of Marine Science
Interannual And Regional Differences In Krill And Fish Prey Quality Along The Western Antarctic Peninsula, Kate E. Ruck
Dissertations, Theses, and Masters Projects
Polar zooplankton and fish safeguard against the seasonality of food availability by using the summer months to build large reserves of lipids, which in turn are utilized to meet the metabolic demands of apex predators such as penguins, seals, and whales. A warming trend in the northern part of the western Antarctic Peninsula (WAP) has led to a decrease in perennial and summer sea ice, an increase in heat content over the shelf, and lower phytoplankton biomass, which could affect prey quality. We compared prey quality, including elemental (C, N) content and ratios, total, neutral, and polar lipid content, and …
Mobile Animals As A Potential Dispersal Mechanism In Zostera Marina (Eelgrass),
2012
College of William and Mary - Virginia Institute of Marine Science
Mobile Animals As A Potential Dispersal Mechanism In Zostera Marina (Eelgrass), Sarah E. Sumoski
Dissertations, Theses, and Masters Projects
No abstract provided.
