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Use of principal components analysis and three-dimensional atmospheric-transport models for reactor-consequence evaluation

Description: This work explores the use of principal components analysis coupled to three-dimensional atmospheric transport and dispersion models for evaluating the environmental consequences of reactor accidents. This permits the inclusion of meteorological data from multiple sites and the effects of topography in the consequence evaluation; features not normally included in such analyses. The technique identifies prevailing regional wind patterns and their frequencies for use in the transport and dispersi… more
Date: January 1, 1982
Creator: Gudiksen, P. H.; Walton, J. J.; Alpert, D. J. & Johnson, J. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Environmental assessment for the Satellite Power System (SPS) Concept Development and Evaluation Program (CDEP). [Microwave and non-microwave health and ecological assessment]

Description: In the satellite power system (SPS), satellites in geosynchronous earth orbit would collect solar energy in space, convert it to microwaves, and transmit the microwaves to receiving antennas (rectennas) on earth. At the rectennas, the microwave energy would be converted to electricity. This SPS environmental assessment considers the microwave and nonmicrowave effects on the terrestrial environment and human health, atmospheric effects, and effects on electromagnetic systems. No environmental pr… more
Date: August 1, 1980
Creator: Valentino, A.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Evaluation of environmental dosimetry models for applicability to possible radioactive waste repository discharges

Description: This report presents the results of a review of the available codes, for application to the National Waste Terminal Storage (NWTS) Program. Consideration was given to the types of radionuclides which may be of concern, the possible modes of release of these radionuclides and the various pathways by which members of the general public in the vicinity of a terminal storage facility may be exposed to the releases. Results reveal that the types and quantities of radioactive material requiring dispo… more
Date: September 1, 1977
Creator: Mauro, J. J.; Michlewicz, D. & Letizia, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Treatment of dynamical processes in two-dimensional models of the troposphere and stratosphere

Description: The physical structure of the troposphere and stratosphere is the result of an intricate interplay among a large number of radiative, chemical, and dynamical processes. Because it is not possible to model the global environment in the laboratory, theoretical models must be relied on, subject to observational verification, to simulate atmospheric processes. Of particular concern in recent years has been the modeling of those processes affecting the structure of ozone and other trace species in t… more
Date: July 1, 1980
Creator: Wuebbles, D.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Future aircraft and potential effects on stratospheric ozone and climate

Description: The purpose of this study is to extend the recent research examining the global environmental effects from potential fleets of subsonic and supersonic commercial aircraft. Initial studies with LLNL models of global atmospheric chemical, radiative, and transport processes have indicated that substantial decreases in stratospheric ozone concentrations could result from emissions of NO{sub x} from aircraft flying in the stratosphere, depending on fleet size and magnitude of the engine emissions. T… more
Date: October 1, 1991
Creator: Kinnison, D.E. & Wuebbles, D.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Influences of clouds and rain on the large-scale transport and deposition of sulfur

Description: This paper describes the application of a three-dimensional, global-scale Eulerian model with an explicit description of cloud and chemical processes. Simulation results describing the transport of sulfur from North America and Europe across the north Atlantic Ocean during a climatological July are presented. Wet deposition was found to contribute slightly more to total sulfur deposition than dry deposition, a feature explained by the large amounts of precipitation during this month. The wet de… more
Date: July 1, 1991
Creator: Luecken, D.J.; Berkowitz, C.M. & Easter, R.C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Study of electric field and ion effects on HVDC lines

Description: Progress is reported in research on the electric field and ion effects of bipolar HVDC transmission lines with voltages up to 1500 kV and on the space charge generation characteristics of different types of conductors for HVDC transmission. (LCL)
Date: January 1, 1980
Creator: Comber, M.G. & Johnson, G.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Low level waste management: a compilation of models and monitoring techniques. Volume 1

Description: In support of the National Low-Level Waste (LLW) Management Research and Development Program being carried out at Oak Ridge National Laboratory, Science Applications, Inc., conducted a survey of models and monitoring techniques associated with the transport of radionuclides and other chemical species from LLW burial sites. As a result of this survey, approximately 350 models were identified. For each model the purpose and a brief description are presented. To the extent possible, a point of con… more
Date: April 1, 1980
Creator: Mosier, J. E.; Fowler, J. R. & Barton, C. J. (comps.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Calculation of particulate dispersion in a design-basis tornadic storm from the Atomics International Nuclear Material Development Facility, Santa Susana, California

Description: A three-dimensional numerical model is used to calculate ground-level air concentration and deposition (due to precipitation scavenging) after a hypothetical tornado strike at the Atomics International Nuclear Material Development Facility at Santa Susana, California. Plutonium particles less than 20 ..mu..m in diameter are assumed to be lifted into the tornadic storm cell by the vortex. The rotational characteristics of the tornadic storm are embedded within the larger mesoscale flow of the st… more
Date: July 1, 1980
Creator: Pepper, D.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Computer codes for dispersion of dense gas

Description: Two models for describing the behavior of dense gases have been adapted for specific applications at the Savannah River Plant (SRP) and have been programmed on the IBM computer. One of the models has been used to predict the effect of a ruptured H/sub 2/S storage tank at the 400 Area. The other model has been used to simulate the effect of an unignited release of H/sub 2/S from the 400-Area flare tower.
Date: February 1, 1982
Creator: Weber, A. H. & Watts, J. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Planetary-Wave Behavior and Arctic Air Pollution

Description: An attempt was made to relate episodes of air pollution at Barrow, Alaska, containing vanadium, to the behavior of planetary waves in middle and high latitudes. A stationarity index for planetary waves is defined as the ratio between amplitudes computed from monthly mean maps and the mean amplitudes computed on a daily basis and averaged over the same month, irrespective of phase angle. Longitude-time sections of 500-mb height anomalies at various latitudes are related to vanadium pollution epi… more
Date: January 1, 1979
Creator: Reiter, Elmar R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of a three-dimensional model of the atmospheric boundary layer using the finite element method

Description: This report summarizes our current effort and ideas toward the development of a model for the planetary boundary layer using the finite element technique. As an initial step, the finite element methodology is applied to simpler version of the boundary layer equations given by the two-dimensional, constant-property, incompressible conservation equations (Navier-Stokes equations). Solution procedures for both the steady-state and transient equations are discussed. For the transient problem, a var… more
Date: November 22, 1977
Creator: Lee, R. L. & Gresho, P. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Dispersion experiments using short-term releases of an atmospheric tracer

Description: The Mesoscale Atmospheric Transport Studies (MATS) experiments were undertaken to provide a data base for determining the accuracy of mesoscale atmospheric dispersion model predictions for short term releases. This paper describes the MATS experiments and compares observed dispersion parameters with theory. The movement of the sulfur hexaflouride cloud has been compared with wind sensors placed at several different elevations. The observed sigma-y values are also compared with theory and found … more
Date: January 1, 1985
Creator: Weber, A H & Kurzeja, R J
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Role of organic soils in the world carbon cycle: problem analysis and research needs

Description: In May 1979, The Institute of Ecology held a workshop to determine the role of organic soils in the global carbon cycle and to ascertain their past, present and future significance in world carbon flux. Wetlands ecologists and soil scientists who participated in the workshop examined such topics as Soils as Sources of Atmospheric CO/sub 2/, Organic Soils, Primary Production and Growth of Wetlands Ecosystems, and Management of Peatlands. The major finding of the workshop is that the organic soil… more
Date: February 1, 1980
Creator: Armentano, T.V. (ed.)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Effects of atmospheric variability on energy utilization and conservation. Progress report

Description: Research progress for the period September 1979 to July 1980 is reported. Research was structured along four major tasks: (1) atmospheric circulation and climate variability; (2) urban mesoclimate; (3) energy demand modelling; and (4) economic implications of weather variability and energy demand: stimulating residential energy conservation through the financial section. (ACR)
Date: July 1980
Creator: Reiter, Elmar R.; Burns, C. C.; Cochrane, H.; Johnson, G. R.; Leong, H. & Sheaffer, J. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Parametrization of net radiation at the surface using data from the Wangara experiment

Description: Hourly Wangara boundary layer data (Clark et al., 1971) was used to substantiate previously derived empirical equations of the surface radiation budget. These equations only require measurements taken by a surface observer in order to be evaluated. A parameterization was made for infrared (IR) radiation. From this procedure, a residual radiation was obtained from the measured daytime net radiation data in order to approximate short wave (SW) radiation. Diurnal trends in radiation and other rela… more
Date: Summer 1980
Creator: Edson, Roger T.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

Effects of atmospheric variability on energy utilization and conservation. Final report, 1 November 1976--31 October 1977

Description: A space-heating energy-consumption model for Greeley, Colorado for the winter of 1976-77 was within 98.9 percent of actual natural gas consumption for that city. Modeling of Cheyenne, Wyoming, including the testing of a new statistical scheme to develop the building census required by the energy consumption model, has progressed to the point where reliable natural gas consumption estimates can be made with the model for that community. A detailed study of temperature and surface wind patterns i… more
Date: February 1978
Creator: Reiter, Elmar R.; Dreiseitl, E.; Johnson, G. R.; Leong, H. H.; Macdonald, B. C.; Somervell, W. L. Jr. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

User's manual for DWNWND: an interactive Gaussian plume atmospheric transport model with eight dispersion parameter options

Description: The most commonly used approach for estimating the atmospheric concentration and deposition of material downwind from its point of release is the Gaussian plume atmospheric dispersion model. Two of the critical parameters in this model are sigma/sub y/ and sigma/sub z/, the horizontal and vertical dispersion parameters, respectively. A number of different sets of values for sigma/sub y/ and sigma/sub z/ have been determined empirically for different release heights and meteorological and terrai… more
Date: May 1, 1980
Creator: Fields, D. E. & Miller, C. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Feasibility of perfluorocarbon tracers (PFTs) in atmospheric source-receptor experiments

Description: A brief description of the perfluorocarbon tracer (PFT) system, which includes the tracers and the release equipment, the air samplers and the analyzers, is presented along with details on the research needs to provide a viable system for MATEX-scenario experiments. The present family of 2 viable PFTs needs to be increased to 5 to 6. Given the present precision of the analysis system, a one year long tracer experiment consisting of 4 hour releases every 60 hours from 5 different sites would req… more
Date: March 1, 1984
Creator: Dietz, R. N. & Senum, G. I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Calculations of increased solar UV fluxes and DUV doses due to stratospheric-ozone depletions

Description: Accurate radiative transfer calculations are performed in the middle ultraviolet spectral region for aerosol-loaded atmospheres with the goal of determining the solar irradiance at the ground and quantifying the irradiance perturbations due to the presence of aerosols and various ozone depletions. The extent of the increase of UV-B radiation as a function of wave-length and solar zenith angle is calculated for five model atmospheres. In addition, the damaging ultraviolet dose rates and radiatio… more
Date: February 1, 1982
Creator: Zardecki, A. & Gerstl, S.A.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Disruption of satellite-to-ground station communication links by nuclear fireballs

Description: Diffraction around nuclear fireballs near the line of sight for satellite-to-ground communication links is calculated numerically. The geometry allows assumption of geometric optics and plane-wave signals. The fireball is modeled as an opaque disk normal to the line of sight. The effect of disk shape and edge taper is considered. 13 figures, 1 table.
Date: October 1, 1977
Creator: Sullivan, T.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

MESOI: an interactive Lagrangian trajectory puff diffusion model

Description: MESOI is an interactive Lagrangian trajectory puff diffusion model based on an earlier model by Start and Wendell at the Air Resources Laboratory Field Office at Idaho Falls, Idaho. Puff trajectories are determined using spatially and temporally varying wind fields. Diffusion in the puffs is computed as a function of distance traveled and atmospheric stability. Exposures are computed at nodes of a 31 by 31 grid. There is also provision for interpolation of short term exposures at off-grid locat… more
Date: December 1, 1981
Creator: Ramsdell, J.V. & Athey, G.F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Calibration and testing or models of the global carbon cycle

Description: A ten-compartment model of the global biogeochemical cycle of carbon is presented. The two less-abundant isotopes of carbon, /sup 13/C and /sup 14/C, as well as total carbon, are considered. The cycling of carbon in the ocean is represented by two well-mixed compartments and in the world's terrestrial ecosystems by seven compartments, five which are dynamic and two with instantaneous transfer. An internally consistent procedure for calibrating this model against an assumed initial steady state … more
Date: January 1, 1980
Creator: Emanuel, W.R.; Killough, G.G. & Shugart, H.H. Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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