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  • Other Sources  (20)
  • Meteorology and Climatology
  • 1985-1989  (6)
  • 1980-1984  (14)
  • 1
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    Tropospheric sources of NOx: lightning and biology (1984)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: Laboratory experiments to quantify the global production of NOx (NO + NO2) in the troposphere due to atmospheric lightning and biogenic activity in soil are presented. These laboratory experiments, as well as other studies, suggest that the global production of NOx by lightning probably ranges between 2 and 20 MT(N)y-1 of NO and is strongly dependent on the total energy deposited by lightning, a quantity not well-known. In our laboratory experiments, nitrifying micro-organisms is soil were found to be a significant source of both NO and nitrous oxide (N2O). The measured production ratio of NO to N2O averaged 2-3 for oxygen partial pressures of 0.5-10%. Extrapolating these laboratory measurements to the global scale, which is somewhat risky, suggests that nitrifying micro-organisms in soil may account for as much as 10 MT(N) y-1 of NO. Additional experiments with denitrifying micro-organisms gave an NO to N2O production ratio ranging from 2 to 4 for an oxygen partial pressure of 0.5% and a ratio of less than unity for oxygen partial pressures ranging from 1 to 20%. The production of NO and N2O, normalized with respect to micro-organism number indicates that the production of both NO and N2O by denitrifying micro-organisms is at least an order of magnitude less than production by nitrifying micro-organisms for the micro-organisms studied.
    Keywords: Meteorology and Climatology
    Type: Atmospheric environment (ISSN 0004-6981); Volume 18; 9; 1797-804
    Format: text
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  • 2
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    Comments on the BLAG model: the carbonate-silicate geochemical cycle and its effect on atmospheric carbon dioxide over the past 100 million years (1984)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: A self-consistent method of determining initial conditions for the model presented by Berner, Lasaga, and Garrels (1983) (henceforth, the BLAG model) is derived, based on the assumption that the CO2 geochemical cycle was in steady state at t = -100 my (million years). This initialization procedure leads to a dissolved magnesium concentration higher than that calculated by Berner, Lasaga, and Garrels and to a low ratio of dissolved calcium to bicarbonate prior to 60 my ago. The latter prediction conflicts with the geologic record of evaporite deposits, which requires that this ratio remain greater than 0.5. The contradiction is probably caused by oversimplifications in the BLAG model, such as the neglect of the cycles of organic carbon and sulfur.
    Keywords: Meteorology and Climatology
    Type: American journal of science (ISSN 0002-9599); Volume 284; 1175-82
    Format: text
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  • 3
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    Seafloor hydrothermal activity and spreading rates: the Eocene carbon dioxide greenhouse revisted (1985)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: A suggestion has been made that enhanced rates of hydrothermal activity during the Eocene could have caused a global warming by adding calcium to the ocean and pumping CO2 into the atmosphere (Owen and Rea, 1984). This phenomenon was purported to be consistent with the predictions of the CO2 geochemical cycle model of Berner, Lasaga and Garrels (1983) (henceforth BLAG). In fact, however, the BLAG model predicts only a weak connection between hydrothermal activity and atmospheric CO2 levels. By contrast, it predicts a strong correlation between seafloor spreading rates and pCO2, since the release rate of CO2 from carbonate metamorphism is assumed to be proportional to the mean spreading rate. The Ecocene warming can be conveniently explained if the BLAG model is extended by assuming that the rate of carbonate metamorphism is also proportional to the total length of the midocean ridges from which the spreading originates.
    Keywords: Meteorology and Climatology
    Type: Geochimica et cosmochimica acta (ISSN 0016-7037); Volume 49; 2541-4
    Format: text
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  • 4
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    Synoptic and Mesoscale Cloud Tracking (1982)
    In:  CASI
    Details
    Publication Date: 2004-10-05
    Description: The papers in this section include: 1)'Wind Derivation from Geostationary Satellites'; 2) 'The Operational Processing of Wind Estimates from Cloud Motions: Past, Present, and Future'; 3) 'Intercomparision of SMS Wind Sets: A Study Using Rapid Scan Imagery'; 4) 'Mesoscale Wind Fields for a Severe Storm Situation Determined from SMS Cloud Observations'; 5) 'Moisture Convergence Using Satellite-Derived Wind Fields: A Severe Local Storm Case Study'
    Keywords: Meteorology and Climatology
    Type: Workshop on Satellite Meteorology. Part 2: Satellite Image Analysis and Interpretation
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  • 5
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    Infrared Data for Storm Analysis (1982)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: The papers in this section include: 1) 'Thunderstorm Top Structure Observed by Aircraft Overflights with an Infrared Radiometer'; 2) 'Thunderstorm Intensity as Determined from Satellite Data'; 3) 'Relation of Satellite-Based Thunderstorm Intensity to Radar-Estimated Rainfall'; 4) 'A Simple Physical Basis for Relating Geosynchronous Satellite Infrared Observations to Thunderstorm Rainfall'; 5) 'Satellite-Observed Cloud-Top Height Changes in Tornadic Thunderstorms'; 6) 'Predicting Tropical Cyclone Intensity Using Satellite-Measured Equivalent Blackbody Temperatures of Cloud Tops'.
    Keywords: Meteorology and Climatology
    Type: Workshop on Satellite Meteorology. Part 2: Satellite Image Analysis and Interpretation
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  • 6
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    Stereo Measurements from Satellites (1982)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: The papers in this presentation include: 1) 'Stereographic Observations from Geosynchronous Satellites: An Important New Tool for the Atmospheric Sciences'; 2) 'Thunderstorm Cloud Top Ascent Rates Determined from Stereoscopic Satellite Observations'; 3) 'Artificial Stereo Presentation of Meteorological Data Fields'.
    Keywords: Meteorology and Climatology
    Type: Workshop on Satellite Meteorology. Part 2: Satellite Image Analysis and Interpretation
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  • 7
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    Weather Data Receiver (1982)
    In:  CASI
    Details
    Publication Date: 2018-06-09
    Description: Northern Video Graphics, Inc. developed a low-cost satellite receiving system for users such as independent meteorologists, agribusiness firms, small airports or flying clubs, marine vessels and small TV stations. Called Video Fax, it is designed for use with certain satellites; the GOES (Geostationary Operational Environmental Satellite) spacecraft operated by the National Oceanic and Atmospheric Administration, the European Space Agency's Meteosat and Japan's Geostationary Meteorological Satellite. By dictum of the World Meteorological Organization, signals from satellites are available to anyone without cost so the Video Fax user can acquire signals directly from the satellite and cut out the middle man, enabling savings. Unit sells for about one-fifth the cost of the equipment used by TV stations. It consists of a two-meter antenna; a receiver; a microprocessor-controlled display computer; and a video monitor. Computer stores data from the satellites and converts it to an image which is displayed on the monitor. Weather map can be preserved as signal data on tape, or it can be stored in a video cassette as a permanent image.
    Keywords: Meteorology and Climatology
    Type: Spinoff 1982; 109
    Format: application/pdf
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  • 8
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    Windshear Prediction (1988)
    In:  CASI
    Details
    Publication Date: 2018-06-09
    Description: Windshear microbursts and extreme air turbulence caused by sudden intense changes in wind direction or speed are difficult to detect and thus dangerous to air traffic. They have been positively identified as the cause of 28 aviation accidents that claimed 491 lives. Many groups are investigating ways to detect and predict windshear. The Federal Aviation Consulting Services, Ltd. (FACS) is applying artificial intelligence to windshear prediction. FACS' artificial intelligence based airline dispatcher program is intended as a backup not a replacement for human dispatcher. It would incorporate the same data that a human would request to make a decision and then draw a conclusion using the same rules of logic as the human expert.
    Keywords: Meteorology and Climatology
    Type: Spinoff 1988; 125
    Format: application/pdf
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  • 9
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    Yacht Race Monitoring (1981)
    In:  CASI
    Details
    Publication Date: 2018-06-09
    Description: Observer Single-handed Transatlantic Race (OSTAR) participants were aided by a French-American space-based monitoring system which reported the yacht's positions throughout the race, and also served as an emergency locator service. Originating from NASA's Nimbus 6 Satellite, use of this system, called ARGOS made the OSTAR competition the most accurately reported sea race ever conducted. Each boat carried a portable transmitter allowing 88 new sources of oceanographic data available during the race.
    Keywords: Meteorology and Climatology
    Type: Spinoff 1981; 70-71
    Format: application/pdf
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  • 10
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    Lightning Current Detector (1981)
    In:  CASI
    Details
    Publication Date: 2018-06-09
    Description: Lightning Current Detector (LCD) was developed to monitor the magnitude of lightning strikes. Information it supplies is useful in evaluating lightning protection designs for such systems as telephone cables, radio broadcast towers, power transmission equipment and oil well towers.
    Keywords: Meteorology and Climatology
    Type: Spinoff 1981; 68
    Format: application/pdf
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