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Articles 10741 - 10770 of 14046
Full-Text Articles in Oceanography and Atmospheric Sciences and Meteorology
Atmospheric Lidar Observatory (Alo) Ten-Year Mesospheric Temperature Climatology, Joshua P. Herron, Vincent B. Wickwar
Atmospheric Lidar Observatory (Alo) Ten-Year Mesospheric Temperature Climatology, Joshua P. Herron, Vincent B. Wickwar
Posters
The Rayleigh-scatter lidar at the Atmospheric Lidar Observatory (ALO) on the Utah State University (USU) (41.7°N, 111.8°W) campus has been in operation since 1993. The temperature database now contains over ten years of Rayleigh-scatter temperatures. A multi-year temperature climatology has been calculated from these observations along with the RMS and interannual variability. These temperatures and the climatology are currently being used in a number of mesospheric studies, including mesospheric inversion layers, tides, planetary waves, cyclical variations, trends, longitudinal comparisons, and validation studies.
Examples Of Alo Results, Vincent B. Wickwar, Joshua P. Herron, Karen M. Nelson, Troy A. Wynn, Kristina Thomas, Eric M. Lundell
Examples Of Alo Results, Vincent B. Wickwar, Joshua P. Herron, Karen M. Nelson, Troy A. Wynn, Kristina Thomas, Eric M. Lundell
Presentations
No abstract provided.
A Physiochemically Constrained Seawater Culturing System For Production Of Benthic Foraminifera, Christopher J. Hintz, G. Thomas Chandler, Jay M. Bernhardt, Daniel C. Mccorkle, Suzanne M. Havach, Jessica K. Blanks, Timothy J. Shaw
A Physiochemically Constrained Seawater Culturing System For Production Of Benthic Foraminifera, Christopher J. Hintz, G. Thomas Chandler, Jay M. Bernhardt, Daniel C. Mccorkle, Suzanne M. Havach, Jessica K. Blanks, Timothy J. Shaw
Faculty Publications
No abstract provided.
Soil Moisture As An Indicator Of Weather Extremes, Venkat Lakshmi, Thomas C. Piechota, Ujjwal Narayan, Chunling Tang
Soil Moisture As An Indicator Of Weather Extremes, Venkat Lakshmi, Thomas C. Piechota, Ujjwal Narayan, Chunling Tang
Civil and Environmental Engineering and Construction Faculty Research
In this paper, we investigate floods and droughts in the Upper Mississippi basin over a 50-year period (1950–1999) using a hydrological model (Variable Infiltration Capacity Model – 3 Layer). Simulations have been carried out between January 1950 and December 1999 at daily time-step and 1/8° spatial resolution for the water budget and at hourly time-step and 1° spatial resolution for the energy balance. This paper will provide valuable insights to the slow response components of the hydrological cycle and its diagnostic/predictive value in the case of floods and droughts. The paper compares the use of the Palmer Drought Severity Index …
Haptic Gdraw: A Fun And Easy To Use 3d Haptically Enhanced Sculpting Program, Rick Komerska, Colin Ware
Haptic Gdraw: A Fun And Easy To Use 3d Haptically Enhanced Sculpting Program, Rick Komerska, Colin Ware
Center for Coastal and Ocean Mapping
We have developed a simple haptically-enhanced 3D sculpting application which utilizes Hermite spline-based primitives as building blocks to construct more complex solid models. To accomplish this, we have constructed a VR work environment which is intuitive and whose control affordances are made clear through the use of graspable handles. Haptics is used to support handle selection and provide physical constraints on handle movements consistent with their visual affordances. Our goal is to demonstrate how relatively simple haptic force constraints can combine with a visually intuitive and compelling environment to enable a program that is fun and easy to use.
A Recommendation For An Enhanced Fujita Scale (Ef-Scale)
A Recommendation For An Enhanced Fujita Scale (Ef-Scale)
United States Department of Commerce: Staff Publications
Background
National Weather Service (NWS) personnel who are responsible for rating tornadoes have expressed frustrations in applying the Fujita Scale in a consistent and accurate manner. Weak links in a structural system or a slow-moving storm sometimes lead to an overrating of a tornado event. Several technical articles suggest that wind speeds associated with some descriptions of damage are too high. For example, a 260 mph wind speed is not required to completely destroy a well constructed house and blow away the debris. The damage occurs at significantly lower wind speeds. Minor et al. (1977) and Phan and Simiu (2003) …
A 700 Year Record Of Southern Hemisphere Extratropical Climate Variability, Paul A. Mayewski, Kirk A. Maasch, James W.C. White, Eric J. Steig, E A. Meyerson, Ian D. Goodwin, Vin Morgan, Tas D. Van Ommen, Mark Aj Curran, Joseph M. Souney Jr, K Kreutz
A 700 Year Record Of Southern Hemisphere Extratropical Climate Variability, Paul A. Mayewski, Kirk A. Maasch, James W.C. White, Eric J. Steig, E A. Meyerson, Ian D. Goodwin, Vin Morgan, Tas D. Van Ommen, Mark Aj Curran, Joseph M. Souney Jr, K Kreutz
All Materials
Annually dated ice cores from West and East Antarctica provide proxies for past changes in atmospheric circulation over Antarctica and portions of the Southern Ocean, temperature in coastal West and East Antarctica, and the frequency of South Polar penetration of El Niño events. During the period AD 1700–1850, atmospheric circulation over the Antarctic and at least portions of the Southern Hemisphere underwent a mode switch departing from the out-of-phase alternation of multi-decadal long phases of EOF1 and EOF2 modes of the 850 hPa field over the Southern Hemisphere (as defined in the recent record by Thompson and Wallace, 2000; Thompson …
Analysis Of Phytoplankton Nutrient Limitation In Farmington Bay And The Great Salt Lake, Wayne A. Wurtsbaugh, Amy M. Marcarelli
Analysis Of Phytoplankton Nutrient Limitation In Farmington Bay And The Great Salt Lake, Wayne A. Wurtsbaugh, Amy M. Marcarelli
Watershed Sciences Faculty Publications
The Great Salt Lake is bordered to the south and east by a growing metropolitan area that contributes high nutrients to Farmington Bay. This large bay is eutrophic, and there is concern that continued increases in effluents from the Salt Lake City area could extend to impact the much larger, and currently less productive, Gilbert Bay. This study focused on determining how nutrient supplies might limit, and therefore control, algal populations in Farmington Bay and Gilbert Bay at different salinities. We tested both short and long-term responses of algal growth using laboratory nutrient addition bioassays in the summer and fall …
Estimating Equatorial F-Region Daytime Vertical E X B Drift Velocities From Ground-Based Magnetometer Measurements In The Philippine Longitude Sector, Shauna M. Kinkela
Estimating Equatorial F-Region Daytime Vertical E X B Drift Velocities From Ground-Based Magnetometer Measurements In The Philippine Longitude Sector, Shauna M. Kinkela
Theses and Dissertations
Ionospheric disturbances can severely impact Department of Defense (DoD) systems, such as radar. satellite. and navigation technologies. Forecasting disturbances and describing the Earth's ionosphere, in turn, relies upon innovative computer-based models that gather input parameters from ground and space-borne observations and empirical models for ionospheric drivers. Equatorial E x B drift velocities are significant input parameters that go into many ionospheric models, because they help describe vertical plasma motions near the magnetic equator. Previous work by Anderson, et al 2002 has demonstrated the ability to derive Peruvian longitude sector, daytime vertical E x B drifts from ground-based magnetometer data. The …
Groundwater Trends In The North Stirling Pallinup Sub-Region, Ruhi Ferdowsian, Lisa Crossing
Groundwater Trends In The North Stirling Pallinup Sub-Region, Ruhi Ferdowsian, Lisa Crossing
Natural resources published reports
The South Coast Regional Initiative Planning Team (SCRIPT) has divided the South Coast region of Western Australia into six sub-regions. This publication describes the groundwater trends, risk of shallow watertables, and technical feasibility of salinity management in the agricultural district of the North Stirling Pallinup sub-region.
This sub-region encompasses the Stirling Range National Park, the North Stirling Basin to the north-east of the Park, and the middle and upper catchments of the Pallinup River. Almost 90% (500,000 ha) of the sub-region's alienated land has been cleared for agriculture, and salinity has been identified as an important issue.
Soil-landscape zones are …
Groundwater Trends In The Fitzgerald Biosphere Sub-Region, Adam Lillicrap
Groundwater Trends In The Fitzgerald Biosphere Sub-Region, Adam Lillicrap
Natural resources published reports
The South Coast Regional Initiative Planning Team (SCRIPT) has divided the South Coast region into six sub-regions. The Fitzgerald Biosphere sub-region is located in the centre of the South Coast region of Western Australia (Figure 1). It is bounded by the Pallinup River to the east, Jerdacuttup River to the west, and includes the catchments of the Gairdner, Fitzgerald and Phillips Rivers. The sub-region encompasses the Fitzgerald Biosphere Reserve and just over half (730,000 ha) has been cleared for agriculture.
This publication describes the groundwater trends, risk of shallow watertables, and technical feasibility of salinity management in the soil landscape …
Derivation Of A Self-Consistent Auroral Oval Model Using The Auroral Boundary Index, Keith A. Anderson
Derivation Of A Self-Consistent Auroral Oval Model Using The Auroral Boundary Index, Keith A. Anderson
Theses and Dissertations
The position and intensity of the auroral oval has many implications for the Air Force from determining the effects of incoming electron flux on DoD systems to modeling the ionosphere to exploit current HF communications capabilities. The auroral morphology is a good indicator of the level at which space weather and its near-Earth consequences are occurring, and thus it is important to develop an auroral prediction model. However, since no purely physics-based models exist to describe the temporal and spatial evolution of the auroral zone, space weather practitioners and researchers are forced to produce statistical representations, “organized” by some relevant …
Comparative Study On The Use Of Coherent Radar-Derived Electric Fields Vs. Statistical Electric Fields For The Initialization Of A High-Latitude Ionospheric Model, Christopher M. Hogue
Comparative Study On The Use Of Coherent Radar-Derived Electric Fields Vs. Statistical Electric Fields For The Initialization Of A High-Latitude Ionospheric Model, Christopher M. Hogue
Theses and Dissertations
The structure and time development of the magnetosphere-ionosphere system have significant impacts on the Air Force and its mission. Specifically, an accurate knowledge of ionospheric plasma densities is important for the operation of many Air Force systems. This research analyzes plasma density structure development through comparing two distinct electric field models. The two models compared here are a commonly used statistical model created by Heppner and Maynard 1987, and a more recently developed model using real-time coherent radar measurements from the SuperDARN radar network. Ionospheric simulations were run using Utah State University s Time-Dependent Ionospheric Model (TDIM) with the two …
Visualizing The Geology Of Lake Trout Spawning Sites: Northern Lake Michigan, Peter Dartnell, Peter Barnes, James V. Gardner, Kristen Lee
Visualizing The Geology Of Lake Trout Spawning Sites: Northern Lake Michigan, Peter Dartnell, Peter Barnes, James V. Gardner, Kristen Lee
Center for Coastal and Ocean Mapping
Geologists and biologists are working together to understand the links between lake floor geology (composition and shape) and the distribution of lake trout throughout their life cycle. Lake floor geology is one of the main factors determining where lake trout spawn, feed, and hide. In support of ongoing research to study Lake Michigan trout habitats, the U.S. Geological Survey in cooperation with the U.S. Army Corps of Engineers mapped the morphology of principle lake trout spawning sites. Using the Army Corps of Engineer's SHOALS airborne lidar (Light Detection and Ranging) system we mapped six regions in Northern Lake Michigan in …
Slides: Lessons From The Pinedale Anticline Adaptive Management Process, Peter Aengst
Slides: Lessons From The Pinedale Anticline Adaptive Management Process, Peter Aengst
Best Management Practices and Adaptive Management in Oil and Gas Development (May 12-13)
Presenter: Peter Aengst, Regional Associate, The Wilderness Society, Northern Rockies Office
24 slides
Slides: Nepa And Adaptive Management, Denise A. Dragoo
Slides: Nepa And Adaptive Management, Denise A. Dragoo
Best Management Practices and Adaptive Management in Oil and Gas Development (May 12-13)
Presenter: Denise A. Dragoo, Partner, Snell & Wilmer L.L.P., Salt Lake City, UT
22 slides
Slides: Pinedale Anticline Project Area: The Adaptive Management Process, Prill Mecham
Slides: Pinedale Anticline Project Area: The Adaptive Management Process, Prill Mecham
Best Management Practices and Adaptive Management in Oil and Gas Development (May 12-13)
Presenter: Prill Mecham, Pinedale BLM Field Manager
35 slides
Slides: Adaptive Management: Pros, Cons, And Lessons Learned, Pete Morton
Slides: Adaptive Management: Pros, Cons, And Lessons Learned, Pete Morton
Best Management Practices and Adaptive Management in Oil and Gas Development (May 12-13)
Presenter: Pete Morton, Ph.D., The Wilderness Society
21 slides
Slides: Lessons Learned From The Development And Implementation Of An Adaptive Management Plan At Three Hydropower Plants In Northeastern Washington State, Bob Dach
Best Management Practices and Adaptive Management in Oil and Gas Development (May 12-13)
Presenter: Bob Dach, Federal Activities Specialist, U.S. Fish and Wildlife Service, Mountain-Prairie Region, Lakewood, CO
11 slides
Slides: Adaptive Management, Tim Salt
Slides: Adaptive Management, Tim Salt
Best Management Practices and Adaptive Management in Oil and Gas Development (May 12-13)
Presenter: Tim Salt, Western Regional Staff Assistant, U.S. Bureau of Land Management (BLM)
19 slides
Slides: Industry's View Of 'Lessons Learned' From Pinedale Anticline Eis Adaptive Management, Robin Smith
Slides: Industry's View Of 'Lessons Learned' From Pinedale Anticline Eis Adaptive Management, Robin Smith
Best Management Practices and Adaptive Management in Oil and Gas Development (May 12-13)
Presenter: Robin Smith, Mountaintop Consulting, LLC
19 slides
Slides: Bpi Best Practices Initiative: A Collaborative Approach To Leadership For Improving Management Practices On The Working Landscape, Peter Zimmerman
Slides: Bpi Best Practices Initiative: A Collaborative Approach To Leadership For Improving Management Practices On The Working Landscape, Peter Zimmerman
Best Management Practices and Adaptive Management in Oil and Gas Development (May 12-13)
Presenter: Peter Zimmerman, Canadian Parks and Wilderness Society
19 slides
Slides: Technologies To Reduce Methane Emissions From Natural Gas Production Activities, Roger Fernandez
Slides: Technologies To Reduce Methane Emissions From Natural Gas Production Activities, Roger Fernandez
Best Management Practices and Adaptive Management in Oil and Gas Development (May 12-13)
Presenter: Roger Fernandez, EPA Gas STAR Program
31 slides
Slides: Adaptive Management And Best Management Practices On The Southern Ute Indian Reservation, Bob Zahradnik
Slides: Adaptive Management And Best Management Practices On The Southern Ute Indian Reservation, Bob Zahradnik
Best Management Practices and Adaptive Management in Oil and Gas Development (May 12-13)
Presenter: Bob Zahradnik, Red Willow Production Company
38 slides
Agenda: Best Management Practices And Adaptive Management In Oil And Gas Development, University Of Colorado Boulder. Natural Resources Law Center
Agenda: Best Management Practices And Adaptive Management In Oil And Gas Development, University Of Colorado Boulder. Natural Resources Law Center
Best Management Practices and Adaptive Management in Oil and Gas Development (May 12-13)
Agenda includes summaries of speakers' presentations
Workshop held May 12-13, 2004 at the University of Colorado School of Law and sponsored by the Natural Resources Law Center with support from the William and Flora Hewlett Foundation, BP America and Calpine Corporation
Government agencies, industry and others are beginning to apply the concepts of best management practices and adaptive management to oil and gas development. This free workshop will examine what is going on in the Rocky Mountain Region with these innovative management approaches. This timely workshop will be kicked off with a presentation on the Western Governors' Association Coalbed Methane …
View Direction, Surface Orientation And Texture Orientation For Perception Of Surface Shape, Colin Ware, Graeme Sweet
View Direction, Surface Orientation And Texture Orientation For Perception Of Surface Shape, Colin Ware, Graeme Sweet
Center for Coastal and Ocean Mapping
Textures are commonly used to enhance the representation of shape in non-photorealistic rendering applications such as medical drawings. Textures that have elongated linear elements appear to be superior to random textures in that they can, by the way they conform to the surface, reveal the surface shape. We observe that shape following hache marks commonly used in cartography and copper-plate illustration are locally similar to the effect of the lines that can be generated by the intersection of a set of parallel planes with a surface. We use this as a basis for investigating the relationships between view direction, texture …
Integrated Navigation System: Not A Sum Of Its Parts, Lee Alexander, Joseph F. Ryan Capt., Michael J. Casey
Integrated Navigation System: Not A Sum Of Its Parts, Lee Alexander, Joseph F. Ryan Capt., Michael J. Casey
Center for Coastal and Ocean Mapping
Similar to the evolutionary process for living organisms, marine navigation systems are becoming increasingly complex and sophisticated. Both by design and function, shipboard and shore-based navigation systems are no longer individual equipment components operating independently. Instead, the trend is toward integration, data fusion and synergy. One example of this are new Performance Standards being considered by IMO to achieve a “harmonized” presentation of all navigation-related information on the display of an integrated navigation system (INS). Unlike a dedicated display for ECDIS or radar, the new INS displays will be a task-oriented composite presentations that enable the mariner to configure the …
Inland Ecdis Development And Standardization, Lee Alexander
Inland Ecdis Development And Standardization, Lee Alexander
Center for Coastal and Ocean Mapping
Report on the work undertaken and progress made since CHRIS15 on developing and standardizing Inland ECDIS through North American and European collaboration, and future plans
On The Uncertainty Of Archive Hydrographic Datasets, Brian R. Calder
On The Uncertainty Of Archive Hydrographic Datasets, Brian R. Calder
Center for Coastal and Ocean Mapping
As the international hydrographic community continues to address the question of the irreducible uncertainty in modern surveys, we must ask how we do the same with archived Vertical Beam Echosounder (VBES) and leadline datasets. The ONR funded Strataform project surveyed an area of the New Jersey shelf around 39◦12’N 72◦50’W using an EM1000 Multibeam Echosounder (MBES). This area is also covered by NOAA surveys from 1936- 38 (assumed to be leadline) and 1975-76 (VBES). By comparison of the archival soundings to the MBES data, estimates of measurement error for the archival surveys are constructed as a function of depth. The …
Quantitative Inter-Channel Calibration Of Shoals Signals For Consistent Bottom Segmentation And Characterization, Semme J. Dijkstra, G. Elston
Quantitative Inter-Channel Calibration Of Shoals Signals For Consistent Bottom Segmentation And Characterization, Semme J. Dijkstra, G. Elston
Center for Coastal and Ocean Mapping
No abstract provided.