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Precipitation scavenging models: Sensitivities, tests, and applications

Description: ``Multiphase`` atmospheric-chemistry models can be described as atmospheric-pollutant simulations that explicitly differentiate between physical phases in the atmosphere (.e.g., gas, cloud water, rain water, snow,...), and directly compute chemical transport and transformation behavior between and within each of these individual phases. Initially formulated for specific application to precipitation-scavenging analysis, many attributes of these models have become incorporated into the more gener… more
Date: July 1, 1991
Creator: Hales, J. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Kinetics and dynamics of oxidation reactions involving an adsorbed CO species on bulk and supported platinum and copper-oxide. First year annual report, January 1, 1991--December 31, 1991

Description: The proposed research is an integrated experimental and modeling study of oxidation reactions involving CO as a key player -- be it a reactant, adsorbed intermediate, and/or partial oxidation product -- in the catalytic sequence and chemistry. The reaction systems of interest in the project include CO, formaldehyde, and methanol oxidation by O{sub 2} and CO oxidation by NO, on both Pt and copper oxide catalysts. These reactions are of importance in automobile exhaust catalysis. There is a pauci… more
Date: July 1, 1991
Creator: Harold, M. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An integrated cloud observation and modeling investigation in support of the ARM program. Annual technical progress report, [September 15, 1992--September 14, 1993]

Description: This annual technical progress report, based on the same four divisions used in our original proposal, provides only a brief synopsis of the research carried out dudng the past three years. We have also included a brief description of algorithms and computer programs that have been transferred to the ARM management. Such transfers of knowledge and technique are vital for the success of the ARM program. Various members of our research group participated in two major field programs: the First ISS… more
Date: July 28, 1993
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Natural resource management activities at the Savannah River Site. Environmental Assessment

Description: This environmental assessment (EA) reviews the environmental consequences of ongoing natural resource management activities on the Savannah River Site (SRS). Appendix A contains the Natural Resources Management Plant (NRMP). While several SRS organizations have primary responsibilities for different elements of the plan, the United States Department of Agriculture (USDA), Forest Service, Savannah River Forest Station (SRFS) is responsible for most elements. Of the river scenarios defined in 198… more
Date: July 1, 1993
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Wetland vegetation establishment in L-Lake

Description: Wetland vegetation was transplanted from PAR Pond to L-Lake between January and August, 1987. Approximately 100,000 individual plants representing over 40 species were transplanted along the southern shoreline. Three zones of vegetation were created: (1) submersed/floating-leaved, (2) emergent, (3) upper emergent/shrub. During the summers of 1987, 1988, 1989, the Savannah River Ecology Laboratory sampled the vegetation in 54 permanent transects located in planted (N=32) and unplanted areas (N=2… more
Date: July 1, 1990
Creator: Kroeger, S. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Simulations of the carbon cycle in the oceans

Description: This study includes models of oceanic CO{sub 2} uptake. This perturbation simulation of carbon dioxide uptake gives strong support to estimates of oceanic uptake of fossil CO{sub 2} of order 2 GtC/yr. over the last decade. Carbon and carbon-nitrogen models are considered.
Date: July 1, 1992
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Comparison of the prevalence index and average wetland values for identification of wetland vegetation

Description: Prevalence index values (FICWD, 1989) and average wetland values for all species present were compared for three wetland gas pipeline rights-of-way (ROWS) and adjacent natural areas. The similarities in results using these two indicator values suggest that an average wetland value may offer a simpler, less time-consuming method of evaluating the vegetation of a study site as an indication of wetness. Both PIVs and AWVs, are presented for the ROWs and the adjacent natural area at each site.
Date: July 1, 1992
Creator: Zimmerman, R. E.; Shem, L. M.; Gowdy, M. J.; Van Dyke, G. D. & Hackney, C. T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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An experimental and numerical study of the modifications of mixed-layer structure by inhomogeneous surface fluxes and secondary circulations

Description: The problem of scale interactions in the planetary boundary layer (PBL), i.e., how forcing mechanisms of differing spatial and temporal scales affect the properties of the PBL, has been a subject of considerable interest for some time. One aspect of this problem that has received increasing attention in recent years is the representation, in mesoscale and general circulation models. of the effects of subgrid-scale inhomogeneities in surface properties. Differences in sensible and latent heat fl… more
Date: July 1, 1994
Creator: Zhong, S. & Doran, J. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Approach and strategy for performing ecological risk assessments for the Department of Energy Oak Ridge Field Office Environmental Restoration Program. Environmental Restoration Program

Description: This document is intended to supplement exiting US Environmental Protection Agency (EPA) guidance for ecological risk assessment at hazardous waste sites by providing guidance that is more specific and more tailored to US Department of Energy sites than the guidance available from the EPA. However, it is a conceptual strategy document and does not include specific guidance on data, assumptions, and models. That detailed guidance is under development and will be presented in subsequent documents… more
Date: July 1, 1992
Creator: Suter, G. W. II; Redfearn, A.; White, R. K. & Shaw, R. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Simulations of the global carbon cycle and anthropogenic CO{sub 2} transient. Annual report

Description: This research focuses on improving the understanding of the anthropogenic carbon dioxide transient using observations and models of the past and present. In addition, an attempt is made to develop an ability to predict the future of the carbon cycle in response to continued anthropogenic perturbations and climate change. Three aspects of the anthropogenic carbon budget were investigated: (1) the globally integrated budget at the present time; (2) the time history of the carbon budget; and (3) t… more
Date: July 1, 1994
Creator: Sarmiento, J. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

[An experimental regional scale climate simulation laboratory]. Year 1 progress letter

Description: The major focus of this CHAMMP science team project is the development and in-model testing of new numerical methods and dynamical algorithms which are particularly well suited to massively parallel computers. The project includes efforts relevant to both global ocean circulation models and atmospheric General Circulation Models GCMS. During the first year of the project we have been focusing on two basic areas. The first of these is the implementation and testing of a global non-linear dynamic… more
Date: July 1, 1993
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Hydrologic studies for the Waste Isolation Pilot Plant

Description: The objective of this paper is to provide a general overview of hydrologic conditions at the Waste Isolation Pilot Plant (WIPP) by describing several key hydrologic studies that have been carried out as part of the site characterization program over the last 20 years. The paper is composed of three parts: background information about general objectives of the WIPP project; information about the geologic and hydrologic setting of the facility; and information about three aspects of the hydrologi… more
Date: July 1, 1994
Creator: Davies, P. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Mass and energy budgets of animals: Behavioral and ecological implications. Annual technical progress report, April 1, 1992--March 31, 1993

Description: The common goal of these diverse projects is to understand the mechanisms of how animal populations respond to the continual changes in their environment in both time and space. Our models are mechanistic allowing us to explore how a wide array of environmental variables may determine individual performance. Large scale climate change and its effect on animal populations can be seen as quantitative extensions of biological responses to smaller scales of environmental variability. Changes in dev… more
Date: July 1, 1993
Creator: Porter, W. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Global Historical Climatology Network: Long-term monthly temperature, precipitation, sea level pressure, and station pressure data

Description: Interest in global climate change has risen dramatically during the last several years. In a similar fashion, the number of data sets available to study global change has also increased. Unfortunately, these data sets have been compiled by many different organizations/researchers, making it confusing and time consuming for individual researchers to acquire the ``best`` data. In response to this rapid growth in the number of global data sets, the Carbon Dioxide Information Analysis Center (CDIAC… more
Date: July 1, 1992
Creator: Vose, R. S.; Schmoyer, R. L.; Steurer, P. M.; Peterson, T. C.; Heim, R.; Karl, T. R. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mineral hydrolysis kinetics

Description: Dissolution rate laws for silicate mineral weathering can be related to kinetics of ligand-exchange reactions. This relation is being tested with an experimental/analytical/theoretical program for measuring the dissolution kinetics of orthosilicate minerals for use in ionic modeling and molecular dynamics computer simulations of solid, aqueous solution, and solid/liquid interface. To date, dissolution rate have been measured for a suite of endmember and mixed-cation orthosilicate minerals (both… more
Date: July 1, 1993
Creator: Westrich, H. R.; Cygan, R. T.; Arnold, G. W. & Casey, W. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Some statistical aspects of background based groundwater standards at an arid hazardous waste site

Description: Statistical goodness-of-fit tests and {open_quotes}Box and Whisker{close_quotes} plots of hydrochemical data from selected contaminant-free downgradient wells, and wells located upgradient in a non-contaminated or background area show that spatially distinct sample populations do not exhibit significant differences in groundwater chemical composition within the upper unconfined aquifer. Well location dominates natural constituent variability at this arid site. Spatial coverage should be emphasi… more
Date: July 1, 1994
Creator: Chou, C. J.; Hodges, F. N. & Johnson, V. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Surface fluxes important to cloud development

Description: To address some of the issues in scaling and averaging of measurements, collaborative field campaigns were conducted in June 1991 and 1992 by the DOE laboratories funded under the ARM program. We selected a site in Boardman, OR, with two distinct regions where the sensible and latent heat fluxes would differ sharply and where each region was sufficiently extensive for full development of boundary layers and for utilizing aircraft-mounted instrument systems (Barnes et al. 1992, Doran et al. 1992… more
Date: July 1, 1993
Creator: Barnes, F. J.; Porch, W. & Kunkel, K. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Completion of Spectral Rotating Shadowband Radiometers and Analysis of ARM Spectral Short-Wave Data. Technical Progress Report, November 1, 1993--October 31, 1994

Description: Our ARM goal is to help improve both longwave and shortwave models used in GCMs by providing improved radiometric shortwave data. The inference of cloud cover and optical properties of clouds is another goal of this research effort. At the Atmospheric Sciences Research Center (ASRC) in Albany, New York, we are acquiring downwelling shortwave, including direct and diffuse irradiance, at six wavelengths, plus downwelling longwave, upwelling and downwelling broadband shortwave, and aerosol optical… more
Date: July 18, 1994
Creator: Michalsky, J. & Harrison, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Molecular biology in studies of oceanic primary production

Description: Remote sensing and the use of moored in situ instrumentation has greatly improved our ability to measure phytoplankton chlorophyll and photosynthesis on global scales with high temporal resolution. However, the interpretation of these measurements and their significance with respect to the biogeochemical cycling of carbon relies on their relationship with physiological and biochemical processes in phytoplankton. For example, the use of satellite images of surface chlorophyll to estimate primary… more
Date: July 1, 1992
Creator: LaRoche, J.; Falkowski, P. G. & Geider, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Montana Rivers Information System : Edit/Entry Program User's Manual.

Description: The Montana Rivers Information System (MRIS) was initiated to assess the state`s fish, wildlife, and recreation value; and natural cultural, and geologic features. The MRIS is now a set of data bases containing part of the information in the Natural Heritage Program natural features and threatened and endangered species data bases and comprises of the Montana Interagency Stream Fisheries Database; the MDFWP Recreation Database; and the MDFWP Wildlife Geographic Information System. The purpose o… more
Date: July 1, 1992
Creator: Administration, United States. Bonneville Power & Montana Department of Fish, Wildlife and Parks
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Site Scientific Mission Plan for the Southern Great Plains CART site, July--December 1994

Description: The Southern Great Plains (SGP) Cloud and Radiation Testbed (CART) site is designed to help satisfy the data needs of the Atmospheric Radiation Measurement (ARM) Program Science Team. This document defines the scientific priorities for site activities during the six months beginning on July 1, 1994, and also looks forward in lesser detail to subsequent six-month periods. The primary purpose of this Site Scientific Mission Plan is to provide guidance for the development of plans for site operati… more
Date: July 1, 1994
Creator: Schneider, J. M.; Lamb, P. J. & Sisterson, D. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experimental studies of Reynolds number dependence of turbulent mixing and transport

Description: Predicting turbulent mixing and transport remains a critical problem in industrial flows (combustion chambers, mixers, ventillation systems etc.) and in the environment (smoke plumes etc.). The mixing and transport processes are often a strong function of Reynolds number (Re) and yet there is a paucity of information on their Re dependence. Here we propose experiments of passive scalar mixing in isotropic grid turbulence whereby the Taylor Reynolds number (R{lambda}) will be varied from 30 to o… more
Date: July 1, 1994
Creator: Warhaft, Z.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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QA/QC requirements for physical properties sampling and analysis

Description: This report presents results of an assessment of the available information concerning US Environmental Protection Agency (EPA) quality assurance/quality control (QA/QC) requirements and guidance applicable to sampling, handling, and analyzing physical parameter samples at Comprehensive Environmental Restoration, Compensation, and Liability Act (CERCLA) investigation sites. Geotechnical testing laboratories measure the following physical properties of soil and sediment samples collected during C… more
Date: July 21, 1993
Creator: Innis, B. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Insect community structure and function in Upper Three Runs, Savannah River Site, South Carolina

Description: A project to document the insect species in the upper reaches of Upper Three Runs at the Savannah River site was recently completed. This research was supported by the US Department of Energy under the National Environmental Research Park Program. The work was performed by the Department of Entomology at Clemson University in clemson, SC, by John C. Morse (principal investigator), William R. English and their colleagues. The major output from this study was the dissertation of Dr. William R. En… more
Date: July 8, 1993
Creator: Morse, J. C.; English, W. R. & Looney, B. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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