Water bodies, such as freshwater lakes, are known to be net emitters of carbon dioxide (CO2), and methane (CH4). In recent years, significant greenhouse gas (GHG) emissions from tropical, boreal, and mid-latitude reservoirs have been reported. At a time when hydropower is increasing worldwide, better understanding of seasonal and regional variation in GHG emissions is needed in order to develop a predictive understanding of such fluxes within man-made impoundments. We examined power-producing dam complexes within xeric temperate locations in the northwestern United States. Sampling environments on the Snake (Lower Monumental Dam Complex) and Columbia Rivers (Priest Rapids Dam Complex) included tributary, mainstem, embayment, forebay, and tailrace areas during winter and summer 2012. At each sampling location, GHG measurement pathways included surface gas flux, degassing as water passed through dams during power generation, ebullition within littoral embayments, and direct sampling of hyporheic pore-water. Measurements were also carried out in a free-flowing reach of the Columbia River to estimate unaltered conditions. Surface flux resulted in very low emissions, with reservoirs acting as a sink for CO2 (up to –262 mg m-2 d-1, which is within the range previously reported for similarly located reservoirs). Surface flux of methane remained below 1 mg CH4 …

This report is intended to provide an overview of the fundamentals of the Senate amendment process. It summarizes many of the rules, precedents, and practices of the Senate affecting the consideration of amendments to measures on the floor.

This report identifies the most commonly used motions and requests available to Members during proceedings in the House of Representatives. It does not identify motions and requests used when the House is in the Committee of the Whole House on the State of the Union.

This report discusses secret, or closed, sessions of the House and Senate exclude the press and the public.

This is a final deliverable report for the Advanced Spectral Analysis for Radioxenon project with a focus on radioxenon event categorization.

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This report discusses the basic methodology of life-cycle assessments and compares several of the publicly available studies of greenhouse gas (GHG) emissions data for Canadian oil sands crudes against each other and against those of other global reference crudes. As congressional concern over the environmental impacts of Canadian oil sands production may encompass both a broad understanding of the resource as well as a specific assessment of the proposed Keystone XL pipeline, the report surveys both the general scientific literature as well as the individual findings in the State Department's 2011 Final Environmental Impact Statement (EIS) and 2013 Draft Supplementary EIS for the Keystone XL Project.

Single-column modeling (SCM) is one of the key elements of Atmospheric Radiation Measurement (ARM) research initiatives for the development and testing of various physical parameterizations to be used in general circulation models (GCMs). The data required for use with an SCM include observed vertical profiles of temperature, water vapor, and condensed water, as well as the large-scale vertical motion and tendencies of temperature, water vapor, and condensed water due to horizontal advection. Surface-based measurements operated at ARM sites and upper-air sounding networks supply most of the required variables for model inputs, but do not provide the horizontal advection term of condensed water. Since surface cloud radar and microwave radiometer observations at ARM sites are single-point measurements, they can provide the amount of condensed water at the location of observation sites, but not a horizontal distribution of condensed water contents. Consequently, observational data for the large-scale advection tendencies of condensed water have not been available to the ARM cloud modeling community based on surface observations alone. This lack of advection data of water condensate could cause large uncertainties in SCM simulations. Additionally, to evaluate GCMs’ cloud physical parameterization, we need to compare GCM results with observed cloud water amounts over a …

This report examines human rights issues in the People's Republic of China (PRC), including ongoing rights abuses, legal reforms, and the development of civil society.

This report provides background information and potential oversight issues for Congress on the Coast Guard's programs for procuring 8 National Security Cutters (NSCs), 25 Offshore Patrol Cutters (OPCs), and 58 Fast Response Cutters (FRCs).

This report provides background information and issues for Congress on the sustainment and modernization of the Coast Guard's polar icebreaker fleet, which performs a variety of missions supporting U.S. interests in polar regions.

This report provides background information and potential issues for Congress on the Navy's irregular warfare (IW) and counterterrorism (CT) operations. The Navy's IW and CT activities pose a number of potential oversight issues for Congress, including the definition of Navy IW activities and how much emphasis to place on IW and CT activities in future Navy budgets.

This report provides background information and issues for Congress on the Navy's proposal to homeport a nuclear-powered aircraft carrier (CVN) at Mayport, FL. Transferring a CVN from Norfolk, VA, to Mayport would shift from Norfolk to Mayport the local economic activity associated with homeporting a CVN, which some sources estimate as being worth hundreds of millions of dollars per year.

Petroleum-based liquid hydrocarbons is exclusively major energy source in the transportation sector. Thus, it is the major CO{sub 2} source which is the associated with greenhouse effect. In the United States alone, petroleum consumption in the transportation sector approaches 13.8 million barrels per day (Mbbl/d). It is corresponding to a release of 0.53 gigatons of carbon per year (GtC/yr), which accounts for approximate 7.6 % of the current global release of CO{sub 2} from all of the fossil fuel usage (7 GtC/yr). For the long term, the conventional petroleum production is predicted to peak in as little as the next 10 years to as high as the next 50 years. Negative environmental consequences, the frequently roaring petroleum prices, increasing petroleum utilization and concerns about competitive supplies of petroleum have driven dramatic interest in producing alternative transportation fuels, such as electricity-based, hydrogen-based and bio-based transportation alternative fuels. Use of either of electricity-based or hydrogen-based alternative energy in the transportation sector is currently laden with technical and economical challenges. The current energy density of commercial batteries is 175 Wh/kg of battery. At a storage pressure of 680 atm, the lower heating value (LHV) of H{sub 2} is 1.32 kWh/liter. In contrast, the …

This report focuses on potential approaches that Europe might employ to diversify its sources of natural gas supply, Russia's role in Europe's natural gas policies, and key factors that could hinder efforts to develop alternative suppliers of natural gas. The report assesses the potential suppliers of natural gas to Europe and the short- to medium-term hurdles needed to be overcome for those suppliers to be credible, long-term providers of natural gas to Europe. The report looks at North Africa, potentially the most realistic supply alternative in the near-term, but notes that the region will have to resolve its current political, economic, and security instability as well as the internal structural changes to the natural gas industry. Central Asia, which may have the greatest amounts of natural gas, would need to construct lengthy pipelines through multiple countries to move its natural gas to Europe.

A letter report issued by the Government Accountability Office with an abstract that begins "The U.S. Department of Housing and Urban Development (HUD) reports that it is moving forward with strategic human capital and workforce planning efforts after several years of delays. HUD's most recent workforce plan expired in 2009 and since then HUD has launched several planning efforts. According to HUD, these efforts were preempted by other important priorities, such as responding to the economic crisis. HUD undertook initiatives such as training key program office staff on the need to determine up front the staff HUD could afford to hire. In HUD's latest effort, a contractor is expected to complete human capital and workforce plans no later than fiscal year 2014. In June 2012, an Office of Personnel Management (OPM) review found that HUD's human capital and workforce planning activities did not always follow key principles for planning, implementing, and evaluating the results of human capital management policies and practices. For example, the review found that HUD's human resources policies and programs are not aligned with the organization's mission, strategic goals, or performance outcomes. As a result of these weaknesses, OPM concluded that HUD cannot continually assess and improve …

A letter report issued by the Government Accountability Office with an abstract that begins "IRS continued to make progress in addressing information security control weaknesses, improving its internal control over financial reporting. During fiscal year 2012, IRS management devoted attention and resources to addressing information security controls, and resolved a significant number of the information security control deficiencies that GAO previously reported. Notable among these efforts were the (1) formation of cross-functional working groups tasked with the identification and remediation of specific at-risk control areas, (2) improvement in controls over the encryption of data transferred between accounting systems, and (3) upgrades to critical network devices on the agency's internal network system. However, serious weaknesses remain that could affect the confidentiality, integrity, and availability of financial and sensitive taxpayer data. For example, the agency had not always (1) implemented effective controls for identifying and authenticating users, such as enforcing password complexity on certain servers; (2) appropriately restricted access to its mainframe environment; (3) effectively monitored the mainframe environment; or (4) ensured that current patches had been installed on systems to protect against known vulnerabilities."

A letter report issued by the Government Accountability Office with an abstract that begins "The Department of State's (State) Office of the U.S. Global AIDS Coordinator (OGAC) has reported that per-patient treatment costs declined from about $1,053 to $339 from 2005 to 2011. Purchasing generic antiretroviral (ARV) drugs, together with declining drug prices, has led to substantial savings. OGAC estimates that the President's Emergency Plan for AIDS Relief (PEPFAR) has saved $934 million since fiscal year 2005 by buying generic instead of branded products. PEPFAR's analyses of data from eight country treatment-cost studies indicate that per-patient costs also declined as programs realized economies of scale while taking on new patients. Furthermore, the analyses suggest that costs decreased as countries' treatment programs matured, particularly in the first year after programs expanded, and reduced one-time investments. Per-patient cost savings have facilitated substantial increases in the number of people on ARV treatment. In September 2012, an estimated 8 million were on treatment in lowand middle-income countries, of which PEPFAR directly supported 5.1 million-- an increase of 125 percent since 2008, the year the program was reauthorized."

This experimental plan describes research being conducted by Pacific Northwest National Laboratory (PNNL), in coordinatation with Florida Solar Energy Center (FSEC), Florida HERO, and Lawrence Berkeley National Laboratory (LBNL) to evaluate the impact of ventilation rate on interior moisture levels, temperature distributions, and indoor air contaminant concentrations. Specifically, the research team will measure concentrations of indoor air contaminants, ventilation system flow rates, energy consumption, and temperature and relative humidity in ten homes in Gainesville, FL to characterize indoor pollutant levels and energy consumption associated with the observed ventilation rates. PNNL and FSEC have collaboratively prepared this experimental test plan, which describes background and context for the proposed study; the experimental design; specific monitoring points, including monitoring equipment, and sampling frequency; key research questions and the associated data analysis approach; experimental logistics, including schedule, milestones, and team member contact information; and clearly identifies the roles and responsibilities of each team in support of project objectives.

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