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Environmental impact of uranium mining and milling: an American view

Description: The radiation dose rates to man from uranium milling activities are discussed. The sources of radiation, the radioisotopes involved, and the environmental exposure pathways are described. Risks of cancer to exposed individuals are presented and recommendations made for mitigation of contamination. (ACR)
Date: August 18, 1981
Creator: Momeni, M. H.
Partner: UNT Libraries Government Documents Department
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Kootenai River Floodplain Ecosystem Operational Loss Assessment, Protection, Mitigation and Rehabilitation, 2007-2008 Annual Report.

Description: The overarching goals of the 'Kootenai River Floodplain Ecosystem Operational Loss Assessment, Protection, Mitigation and Rehabilitation' Project (BPA Project No.2002-011-00) are to: (1) assess abiotic and biotic factors (i.e., geomorphologic, hydrological, aquatic and riparian/floodplain communities) in determining a definitive composition of ecological integrity, (2) develop strategies to assess and mitigate losses of ecosystem functions, and (3) produce a regional operational loss assessment… more
Date: February 18, 2009
Creator: Merz, Norm
Partner: UNT Libraries Government Documents Department
open access

Niche of harmful alga Aureococcus anophagefferens revealed through ecogenomics

Description: Harmful algal blooms (HABs) cause significant economic and ecological damage worldwide. Despite considerable efforts, a comprehensive understanding of the factors that promote these blooms has been lacking, because the biochemical pathways that facilitate their dominance relative to other phytoplankton within specific environments have not been identified. Here, biogeochemical measurements showed that the harmful alga Aureococcus anophagefferens outcompeted co-occurring phytoplankton in estuari… more
Date: February 18, 2011
Creator: Grigoriev, Igor; Gobler, Christopher; Salamov, Asaf; Kuo, Alan; Terry, Astrid; Pangillian, Jasmyn et al.
Partner: UNT Libraries Government Documents Department
open access

Co2 geological sequestration

Description: Human activities are increasingly altering the Earth's climate. A particular concern is that atmospheric concentrations of carbon dioxide (CO{sub 2}) may be rising fast because of increased industrialization. CO{sub 2} is a so-called ''greenhouse gas'' that traps infrared radiation and may contribute to global warming. Scientists project that greenhouse gases such as CO{sub 2} will make the arctic warmer, which would melt glaciers and raise sea levels. Evidence suggests that climate change may … more
Date: November 18, 2004
Creator: Xu, Tianfu
Partner: UNT Libraries Government Documents Department
open access

The Effects of Iron Complexing Ligands on the Long Term Ecosystem Response to Iron Enrichment of HNLC waters

Description: The central hypothesis of this project is that natural iron-complexing organic ligands in seawater differentially regulate iron availability to large (microplankton) and small (nano and picoplankton) class of phytoplankton and thereby strongly influence the potential carbon sequestration in High Nitrate Low Chlorophyll (HNLC) regions of the ocean. The primary project goals are to: 1) determine how different natural and synthetic Fe chelators affect Fe availability to phytoplankton species that … more
Date: November 18, 2006
Creator: Wells, Mark L.; Perry, Mary Jane; Cochlan, William P. & Trick, Charles G.
Partner: UNT Libraries Government Documents Department
open access

Leakage and Seepage in the Near-Surface Environment: An Integrated Approach to Monitoring and Detection

Description: Monitoring and detection of leakage and seepage of carbon dioxide (CO{sub 2}) in the near-surface environment is needed to ensure the safety and effectiveness of geologic carbon sequestration. Large leakage fluxes, e.g., through leaking wells, will be easier to detect and monitor than slow and diffuse leakage and seepage. The challenge of detecting slow leakage and seepage is discerning a leakage or seepage signal from within the natural background variations in CO{sub 2} concentration and flux… more
Date: December 18, 2003
Creator: Oldenburg, Curtis M. & Lewicki, Jennifer L.
Partner: UNT Libraries Government Documents Department
open access

On the Estimation of Clear-Sky Upwelling Shortwave and Longwave

Description: Previous work (Long and Ackerman 2000; Long 2004) has concentrated on estimation of the downwelling clear-sky irradiances and the calculation of the effect of clouds on the downwelling radiative energy budget. However, cloud forcing is defined for the difference between clear- and cloudy-sky net radiation, which includes the upwelling components. Thus, if we are to estimate the surface radiative cloud forcing, the means must be developed to estimate what the upwelling shortwave and longwave irr… more
Date: March 18, 2005
Creator: Long, C.N.
Partner: UNT Libraries Government Documents Department
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The Ability of MM5 to Simulate Ice Clouds: Systematic Comparison between Simulated and Measured Fluxes and Lidar/Radar Profiles at SIRTA Atmospheric Observatory

Description: Ice clouds play a major role in the radiative energy budget of the Earth-atmosphere system (Liou 1986). Their radiative effect is governed primarily by the equilibrium between their albedo and greenhouse effects. Both macrophysical and microphysical properties of ice clouds regulate this equilibrium. For quantifying the effect of these clouds onto climate and weather systems, they must be properly characterized in atmospheric models. In this paper we use remote-sensing measurements from the SIR… more
Date: March 18, 2005
Creator: Chiriaco, M.; Vautard, R.; Chepfer, H.; Haeffelin, M.; Wanherdrick, Y.; Morille, Y. et al.
Partner: UNT Libraries Government Documents Department
open access

Military Ecological Risk Assessment Framework (MERAF) for Assessment of Risks of Military Training and Testing to Natural Resources

Description: The objective of this research is to provide the DoD with a framework based on a systematic, risk-based approach to assess impacts for management of natural resources in an ecosystem context. This risk assessment framework is consistent with, but extends beyond, the EPA's ecological risk assessment framework, and specifically addresses DoD activities and management needs. MERAF is intended to be consistent with existing procedures for environmental assessment and planning with DoD testing and t… more
Date: June 18, 2003
Creator: Suter, Glenn W., II; Reinbold, Ketarah A.; Rose, Winifred H. & Chawla, Manroop K.
Partner: UNT Libraries Government Documents Department
open access

Ecological Screening Values for Surface Water, Sediment, and Soil: 2005 Update

Description: One of the principal components of the environmental remediation program at the Savannah River Site (SRS) is the assessment of ecological risk. Used to support CERCLA, RCRA, and DOE orders, the ecological risk assessment (ERA) can identify environmental hazards and evaluate remedial action alternatives. Ecological risk assessment is also an essential means for achieving DOE's risk based end state vision for the disposition of nuclear material and waste hazards, the decommissioning of facilities… more
Date: July 18, 2005
Creator: Friday, G. P.
Partner: UNT Libraries Government Documents Department
open access

Final Technical Report

Description: OAK-B135 This study took place at the Nevada Desert FACE (Free Air CO2 Enrichment) Facility at the Nevada Test Site, where effects of elevated atmospheric CO2 on a desert ecosystem are being studied. One hundred sixty-eight minirhizotrons (clear plastic tubes) were installed to a depth of 1m in the soil in the control and elevated CO2 plots. Tubes were installed from a suspended platform to avoid soil compaction and disturbance. Tubes were placed under individuals of two dominant shrub species,… more
Date: December 18, 2003
Creator: Phillips, Donald L.; Johnson, Mark G. & Tingey, David T.
Partner: UNT Libraries Government Documents Department
open access

Spring 1995 wildlife and vegetation survey, Norton Air Force Base, California

Description: The objectives of the 1994 and 1995 wildlife and vegetation surveys were to gather data to be used for various applications including: (1) basewide Environmental Risk Assessment (ERA) Work Plan (Scoping Document), (2) the completion of the basewide ERA, (3) determining remedial activities, and (4) determining the distribution of state and federal list plant and animal species on Norton AFB. Data gathering included an inventory of plant and animal species present, the identification of potential… more
Date: July 18, 1995
Partner: UNT Libraries Government Documents Department
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