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  • GEOPHYSICS  (340)
  • 1980-1984  (340)
  • 1982  (156)
  • 1981  (184)
  • 1
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    Is there any chlorine monoxide in the stratosphere? (1982)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A ground based search for the 856.50137/cm R(9.5) and for the 859.76765 R(12.5) transitions of stratospheric (Cl-35)O was made in the solar absorption mode using an infrared heterodyne spectrometer. Lines due to stratospheric HNO3 and tropospheric OCS were detected, at about 0.3% absorption levels. The expected lines of ClO in this same region were not detected, even though the optical depth of the ClO lines should be on the order of 0.2% using currently accepted ClO abundances. These infrared measurements suggest that stratospheric ClO is at least a factor of 7 less abundant than is indicated by indirect in situ fluorescence measurements, and the upper limit of 2.4x10 to the 13th power molecules/sq cm to the integrated column density of ClO is a factor of over 4 less than is indicted by microwave measurements. Results imply that the release of fluorocarbon precursors of ClO may be significantly less important for the destruction of stratospheric ozone than was previously thought.
    Keywords: GEOPHYSICS
    Type: NASA-TM-83939 , NAS 1.15:83939
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Report of the NASA working group on tropospheric program planning (1981)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Increased understanding of the chemical phenomena occurring in the troposphere was the research goal. Emphasis was placed on tropospheric impact on environmental quality, including public health, agriculture, climate, and weather.
    Keywords: GEOPHYSICS
    Type: NASA-RP-1062 , L-13855
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    A theoretical assessment of the O3/H2O interference problem in the detection of natural levels of OH via laser induced fluorescence (1981)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Theoretical calculations are presented which estimate the possible magnitude of the O3/H2O derived OH interference signal resulting from the use of the laser-induced fluorescence technique in measuring natural levels of tropospheric OH. Critical to this new assessment has been the measurement of the nascent OH quantum state distribution resulting from the reaction O(1D) + H2O yields 2OH, and an assessment of the subsequent rotational relaxation of the OH species when formed in high k levels.
    Keywords: GEOPHYSICS
    Type: Geophysical Research Letters; 8; Jan. 198
    Format: text
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  • 4
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    Local effects of partly-cloudy skies on solar and emitted radiation (1982)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A computer automated data acquisition system for atmospheric emittance, and global solar, downwelled diffuse solar, and direct solar irradiances is discussed. Hourly-integrated global solar and atmospheric emitted radiances were measured continuously from February 1981 and hourly-integrated diffuse solar and direct solar irradiances were measured continuously from October 1981. One-minute integrated data are available for each of these components from February 1982. The results of the correlation of global insolation with fractional cloud cover for the first year's data set. A February data set, composed of one-minute integrated global insolation and direct solar irradiance, cloud cover fractions, meteorological data from nearby weather stations, and GOES East satellite radiometric data, was collected to test the theoretical model of satellite radiometric data correlation and develop the cloud dependence for the local measurement site.
    Keywords: GEOPHYSICS
    Type: NASA-CR-169272 , NAS 1.26:169272
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  • 5
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    Ozone climatology series. Volume 1: Atlas of total ozone, April 1970 - December 1976 (1982)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Contours and gridded values are given for seven years of monthly mean total ozone data derived from observations with the Backscattered Ultraviolet instrument on Nimbus-4 for the Northern and Southern Hemispheres. The instrument, algorithm, uncertainties in derived ozone and systematic changes in the bias with respect to the international groundbased ozone network of Dobson instruments, are discussed.
    Keywords: GEOPHYSICS
    Type: NASA-RP-1098 , NAS 1.61:1098 , REPT-82F0128-VOL-1
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    NASA TECHNICAL REPORTS
  • 6
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    Local effects of partly cloudy skies on solar and emitted radiations (1981)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Solar radiation measurements are made on a routine basis. Global solar, atmospheric emitted, downwelled diffuse solar, and direct solar radiation measurement systems are fully operational with the first two in continuous operation. Fractional cloud cover measurements are made from GOES imagery or from ground based whole sky photographs. Normalized global solar irradiance values for partly cloudy skies were correlated to fractional cloud cover.
    Keywords: GEOPHYSICS
    Type: NASA-CR-164694
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  • 7
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    Comparison of stratospheric aerosol measurements over Poker Flat, Alaska, July, 1979 (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: Stratospheric aerosols were collected at Poker Flat, Alaska, in July, 1979, to determine particle properties, confirm coincident satellite SAGE measurements, and compare similar results obtained with different airborne samplers. Because of the steep slopes in size-distribution curves for larger particles, it is found that properties such as concentrations, aerosol mass, and optical extinction are very sensitive to small errors in radii. It is calculated that the concentration measurements agree with photoelectric particle counter results when a 16% radius change is introduced. An 8% radius change matches our calculated sulfate mass with filter mass measurements. And a 13% radius change results in agreement between the calculated optical extinction and coincident SAGE satellite results. Recognizing that different instruments can produce 10-20% differences in measured sizes, it is believed the results of these comparative measurements of SAGE and in situ instruments are essentially in agreement.
    Keywords: GEOPHYSICS
    Type: Geophysical Research Letters; 8; Jan. 198
    Format: text
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  • 8
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    Observations near the magnetopause at the onset of the July 29, 1977, sudden storm commencement (1982)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: Characteristics of an earthward movement of the magnetopause caused by the arrival of an interplanetary shockwave are derived from data acquired by the GEOS 1 spacecraft on July 29, 1977. Data were taken on electric field, plasma, magnetic field, energetic particles, and composition before, during, and after leaving the magnetopause. Correlative examinations were made with information gathered by the IMP 7, IMP 8, and ATS 6 satellites. The magnetopause was found to move earthward at 95 km/sec and had a thickness of 500 km. The existence of three different regions is postulated, one with field lines connected directly to the earth, the magnetosphere, a second, the magnetosheath, with no magnetic field line connection to the earth, and a thir; with one end of the field lines connected to the earth and the other to the interplanetary medium, called the transition region.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research; 87; Aug. 1
    Format: text
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  • 9
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    The origin and evolution of the coordinated data analysis workshop process (1982)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: During the planning stage for the International Magnetospheric Study (IMS), it was stressed that coordinated observations among various satellites and among satellite, ground-based, balloon, and rocket (GBR) experiments were essential in obtaining the required observational data base. In the course of operating the Satellite Situation Center (SSC), it was found to be desirable to assemble a problem-oriented digital data base, consisting of a large number of physical parameters obtained from satellite and GBR sensors, in a computer system which would permit a large number of scientists to manipulate, display, discuss, study and analyze the data together in a coordinated manner. It was felt that such a process might shorten the time required to gain full scientific understanding of the observations. This approach was called the Coordinated Data Analysis Workshop (CDAW) process. Attention is given to the preliminary concept, the the initial implementation of the CDAW process, and aspects of subsequent evolution.
    Keywords: GEOPHYSICS
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  • 10
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    Multiple-spacecraft and correlated riometer study of magnetospheric substorm phenomena (1982)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: Double-spacecraft observations presented suggest that growth phase phenomena are widespread in the outer magnetosphere and can occur simultaneously at nightside locations 4-5 hours apart in local time. Evidence is also adduced from multiple-spacecraft data and comprehensive magnetometer and riometer data against the concept that growth phase features are not generally due to substorm activity at other locations in the auroral or polar regions. A close relationship is noted between putative energy input to the magnetosphere and the sensitive response of the magnetic field and energetic particles at pre- and near-midnight geostationary orbit locations. This relationship is shown explicitly for the cases of three event periods. Data are also presented which suggest that growth phase features at synchronous orbit can be strictly controlled by IMF orientations.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research; 87; Aug. 1
    Format: text
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