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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Capture coefficient of highly directed flow of gaseous carbon dioxide and water vapor on cryogenic quartz crystal microbalance
Continuum source molecular beam to provide highly directed gas flows for determining capture coefficient of gaseous carbon dioxide and water vapor
Heat exchange with carbon dioxide along supercritical isotherms under free convection
Surface property effects on effectiveness of mass transfer cooling in laminar boundary layers with hydrogen injected into free stream of nitrogen or carbon dioxide
Carbon dioxide study in Mercury atmosphere yields negative results from observations made with IR SPECTROMETER and 61 inch reflector
Eckert reference temperature yields approximations for heat transfer, skin friction and recovery temperature in high speed laminar diatomic nitrogen and carbon dioxide boundary layers
Carbon dioxide purge and thermal protection system for liquid hydrogen tanks of hypersonic aircraft, comparing with helium purge system
Mass transfer cooling of carbon dioxide-nitrogen binary system in laminar boundary layer, stressing dissociation effect
Growth rate limitations with interactions of light and carbon dioxide investigated for two species of Chlorella
Autotrophic and heterotrophic carbon dioxide fixation regulation in Hydrogenomonas, discussing two Calvin cycle enzymes
Carbonation Cell System for removing carbon dioxide from space cabin atmosphere using electrochemical process
Upper limit of carbon dioxide abundance in Mercury atmosphere
Regenerable sorbent /GAT-O-SORB/ in granular form for carbon dioxide removal from air, discussing design and performance tests of laboratory prototype
Effects of carbon dioxide on electroencephalograms and reaction times in humans
Sampled-data regulator for investigating both steady-state and transient responses of respiratory system of humans to reduced oxygen at fixed levels of carbon dioxide
The National Research Council's decadal survey on Earth Science and Applications from Space[1] recommended the Active Sensing of CO2 Emissions over Nights, Days, and Seasons (ASCENDS) mission for launch in 2013-2016 as a logical follow-on to the Orbiting Carbon Observatory (OCO) which is scheduled for launch in late 2008 [2]. The use of a laser absorption measurement technique provides the required ability to make day and night measurements of CO2 over all latitudes and seasons. As a demonstrator for an approach to meeting the instrument needs for the ASCENDS mission we have developed the airborne Carbon Dioxide Laser Absorption Spectrometer (CO2LAS) which uses the Integrated Path Differential Absorption (IPDA) Spectrometer [3] technique operating in the 2 micron wavelength region.. During 2006 a short engineering checkout flight of the CO2LAS was conducted and the results presented previously [4]. Several short flight campaigns were conducted during 2007 and we report results from these campaigns.
As a precursor to and validation of the core technology necessary for NASA's Active Sensing of CO2 Emissions over Nights, Days,and Seasons (ASCENDS) mission, we flew JPL's Carbon Dioxide Laser Absorption Spectrometer (CO2LAS) in a campaign of five flights onboard NASA's DC-8 Airborne Laboratory in July 2010. This is the latest in a series of annual flight campaigns that began in 2006, and our first on the DC-8 aircraft.
Sulfur dioxide (SO2) is a major atmospheric pollutant with a strong anthropogenic component mostly produced by the combustion of fossil fuel and other industrial activities. As a precursor of sulfate aerosols that affect climate, air quality, and human health, this gas needs to be monitored on a global scale. Global climate and chemistry models including aerosol processes along with their radiative effects are important tools for climate and air quality research. Validation of these models against in-situ and satellite measurements is essential to ascertain the credibility of these models and to guide model improvements. In this study the Goddard Chemistry, Aerosol, Radiation, and Transport (GOCART) module running on-line inside the Goddard Earth Observing System version 5 (GEOS-5) model is used to simulate aerosol and SO2 concentrations. Data taken in November 2010 over Frostburg, Maryland during an SO2 field campaign involving ground instrumentation and aircraft are used to evaluate GEOS-5 simulated SO2 concentrations. Preliminary data analysis indicated the model overestimated surface SO2 concentration, which motivated the examination of mixing processes in the model and the specification of SO2 anthropogenic emission rates. As a result of this analysis, a revision of anthropogenic emission inventories in GEOS-5 was implemented, and the vertical placement of SO2 sources was updated. Results show that these revisions improve the model agreement with observations locally and in regions outside the area of this field campaign. In particular, we use the ground-based measurements collected by the United States Environmental Protection Agency (US EPA) for the year 2010 to evaluate the revised model simulations over North America.