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  • 1
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    Seasonal variation of cloud radiative forcing derived from the Earth Radiation Budget Experiment (1990)
    American Geophysical Union
    Details
    Publication Date: 1990-01-01
    Print ISSN: 0148-0227
    Electronic ISSN: 2156-2202
    Topics: Geosciences
    Published by American Geophysical Union
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    PAPER CURRENT
  • 2
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    Radiative climate forcing by the Mount Pinatubo eruption (1993)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: Radiative flux anomalies derived from the NASA spaceborne Earth Radiation Budget Experiment were used to determine the volcanic radiative forcing that followed the eruption of Mount Pinatubo in June 1991. They are the first unambiguous, direct measurements of large-scale volcanic forcing. The volcanic aerosols caused a strong cooling effect immediately; the amount of cooling increased through September 1991 as shortwave forcing increased relative to the longwave forcing. The primary effects of the aerosols were a direct increase in albedo over mostly clear areas and both direct and indirect increases in the albedo of cloudy areas.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Science (ISSN 0036-8075); 259; 5100; p. 1411-1415.
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Sampling analysis for the earth radiation budget satellite system mission (1977)
    In:  CASI
    Details
    Publication Date: 2006-01-12
    Description: A study was conducted to identify problems related to sampling the Earth's radiant energy budget and to define a satellite system with sufficient sampling to satisfy science requirements on global, zonal, and regional scales.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 153-157
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Cloud cover sampling capability of various satellite combinations for ISCCP (1982)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: One of the most important objectives of the International Satellite Cloud Climatology Project (ISCCP) is the quantification of cloud cover and associated radiation parameters for climate research. The time-varying nature of cloud cover requires a measurement system that obtains cloud radiance at sufficient time intervals for determining accurate values of cloudiness for the appropriate averaging period. Current plans for the ISCCP call for such day to be acquired every 3 hours during both data and night to ensure that the diurnal cycle of cloud cover is adequately sampled. The satellite system proposed is an array of geostationary and polar-orbiting satellites. The error in mean cloud cover estimates for observation systems which do not include geostationary satellites are quantified. Candidates for such a system include two NOAA Sun-synchronous satellites with daylight equatorial-crossing times of 0730 and 1430, and a USSR satellite in an 81 deg. inclination, 900-km altitude orbit.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: World Climate Program Rept. of the First Session of the International Working Group on Data Management for the International Satellite Cloud Climatology Project (ISCCP); 27 p
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Diurnal cloud variations over South America and the southeastern Pacific (1983)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: The changing distributions of cloud cover are of particular importance in understanding the general circulation patterns of the Southern Hemisphere, whose prediction is hampered by the sparse sampling of physical qualities. In near-tropical areas, the diurnal solar heating cycle is noted to be directly responsible for many of the observed weather patterns. Among the atmosphere's familiar responses to this heating cycle are afternoon thunderstorms over tropical land areas and the 'burnoff' of morning fog or low stratus near coastal margins. Attention is given to these aspects of the atmospheric adjustment to the daily solar cycle in terms of regional scale mean cloudiness over part of the Southern Hemisphere.
    Keywords: METEOROLOGY AND CLIMATOLOGY
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    NASA TECHNICAL REPORTS
  • 6
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    Orbital and cloud cover sampling analyses for multisatellite earth radiation budget experiments (1983)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: Computer simulations have been performed to determine the geographical and temporal coverage of various satellite orbits and scanning and nonscanning radiometers for earth radiation budget measurements. These results were used to simulate the sampling of a diurnally varying cloud and radiation field for several different satellite systems to estimate errors in regional monthly mean reflected radiation. The combined results indicate that coincient observations with a minimum of one sun-synchronous satellite and a midinclined orbit satellite are needed to obtain the required regional, zonal, and global coverage with sufficient temporal sampling for obtaining accurate estimates of monthly mean reflected solar radiation. Overall, the best sampling capability and lowest errors were obtained with a three-satellite system, i.e., two sun-synchronous satellites with different equatorial crossing times combined with either a 46 or 57-deg orbit satellite. The results from these analyses have been used in defining a joint NASA-NOAA multisatellite mission for an earth radiation budget experiment.
    Keywords: GEOPHYSICS
    Type: Journal of Spacecraft and Rockets (ISSN 0022-4560); 20; Sept
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    NASA TECHNICAL REPORTS
  • 7
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    ERBE and AVHRR Cirrus cloud fire study (1990)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: Understanding the impact of cirrus clouds on the global radiation budget is essential to determining the role of clouds in the process of climate change. The ongoing Earth Radiation Budget Experiment (ERBE) is charged with measuring the global radiation balance at the top of the atmosphere. The International Satellite Cloud Climatology Project (ISCCP) is measuring global cloud amounts and properties over a time frame similar to ERBE. Specific cloud properties are absent from the ERBE program, while ISCCP lacks the broadband radiances necessary to determine the total radiation fields. Together, results from these two global programs have the potential for improving the knowledge of the relationship between cirrus clouds and the Earth radiation balance. The First ISCCP Regional Experiment (FIRE), especially its cirrus Intensive Field Observations (IFO), provides opportunities for studying radiation measurements from the ERBE taken over areas with known cirrus cloud properties. Satellite measurements taken during the IFO are used to determine the broadband radiation fields over cirrus clouds and to examine the relationship between narrowband and broadband radiances over various known scenes. The latter constitutes the link between the ERBE and the ISCCP.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: FIRE Science Results 1988; p 123-127
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    Orbital and cloud cover sampling analyses for space lidar missions (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The sampling capabilities of an orbital lidar mission are evaluated. Spatial and temporal sampling data from a lidar spacecraft orbit simulation are combined with global, statistical cloud cover data to yield a quantification of lidar measurement opportunities for both partly cloudy and mostly overcast viewing conditions. The optimum launch time (month and local hour) is determined to maximize lidar measurement opportunities for specified cloud cover conditions. Results indicate that the time of year selected for the lidar mission is very important in maximizing acceptable data return, whereas the effect of launch time of day on mission optimization is generally not as strong as the seasonal effect.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: AIAA PAPER 85-0432
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    NASA TECHNICAL REPORTS
  • 9
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    Analysis of radiation parameters derived from the multisatellite Earth Radiation Budget Experiment (1990)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: To quantify the diurnal radiative heating and cooling cycles of the earth and the atmosphere, data from instruments on the Earth Radiation Budget Satellite (ERBS) spacecraft and NOAA-9 satellites obtained from February 1985 through January 1986 were used to investigate longwave (LW) and shortwave (SW) flux as well as albedo for each month of the year. Seasonal variations of radiative parameters and their diurnal cycles are examined for the deserts, vegetated land, and oceans over the globe. The results show significant seasonal variations in both the outgoing LW and the absorbed SW flux, and a pronounced difference was found between oceanic and continental surfaces. Over much of the globe, LW warming is balanced by SW cooling, and clouds have a net cooling effect on the earth. Many areas of the earth were found to exhibit significant diurnal variations in both the LW flux and albedo.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Conference on Satellite Meteorology and Oceanography; Sept. 3-7, 1990; London; United Kingdom
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    Orbital analysis for the upper atmosphere research satellite missions (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: An orbital analysis has been performed to define the spatial and temporal coverage capabilities of limb scanning experiments for meeting the science requirements for the upper atmosphere research satellite missions. Results indicate that a combination of solar occultation experiments and limb thermal emission experiments having azimuthal scan capability can provide good temporal and spatial coverage of the earth from a 600-km, 56-deg inclined orbit for the first satellite mission. Using a 70-deg inclined orbit for the second satellite mission will complement the first mission and provide complete global coverage with the two types of experiments.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: AIAA PAPER 80-0236 , Aerospace Sciences Meeting; Jan 14, 1980 - Jan 16, 1980; Pasadena, CA
    Format: text
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    NASA TECHNICAL REPORTS
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