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    Selection of a map grid for data analysis and archival (1984)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: Arguments for selection of a map grid are reiterated by illustrating the quantitative effects on data quality caused by using different grids. It is shown that the use of the rectangular latitude-longitude grid actually degrades data quality, increases stored data volume, and increases the complexity of data manipulation. Use of an equal-area grid is shown to be a proper way to aggregate data, but such grids are thought to be inconvenient. A solution to this dilemma is proposed by showing that the analysis and archival map grids need not be the same. The results of a proper analysis of the data on an equal-area grid can be remapped to the more 'convenient' rectangular latitude-longitude grid without loss of quality.
    Keywords: GEOSCIENCES (GENERAL)
    Type: Journal of Climate and Applied Meteorology (ISSN 0733-3021); 23; 1253-125
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Cloud feedback - A stabilizing effect for the early earth (1982)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: The effect of variations in cloud cover, optical properties, and fractional distribution with altitude on the mean surface temperature of a model of the early earth has been investigated. In all cases examined, cloud-climate feedbacks result in temperatures greater than those in models with no cloud feedbacks. If the model of hydrospheric feedback effects is correct, then cloud feedbacks are as important to the climate as changes in solar luminosity and atmospheric composition during the earth's atmospheric evolution. In particular, the early earth need not become completely ice-covered if strong negative cloud feedbacks occur. However, until a proper understanding of cloud feedbacks is available, conclusions regarding conditions in the early atmosphere must remain in doubt.
    Keywords: GEOSCIENCES (GENERAL)
    Type: Science; 217; Sept. 24
    Format: text
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