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Variability of Space––Time Mean Rain Rate

Variability of Space––Time Mean Rain Rate A mixed lognormal distribution is fit to rain-rate data for the purpose of estimating the space––time mean. Using Fisher information, the large sample variance is obtained for grouped and ungrouped data estimates. The asymptotic variance results are used in deriving the efficiency of the grouped data estimator as a function of the mixed lognormal parameters. The method is applied to data from the Tropical Ocean Global Atmosphere Coupled Ocean––Atmosphere Response Experiment binned into 2 km ×× 2 km and 4 km ×× 4 km pixels. The variance of estimators is smaller for the 4 km ×× 4 km case, indicating that the lognormal model is more appropriate for the lower-resolution data. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Applied Meteorology American Meteorological Society

Variability of Space––Time Mean Rain Rate

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Publisher
American Meteorological Society
Copyright
Copyright © 1996 American Meteorological Society
ISSN
1520-0450
DOI
10.1175/1520-0450(1997)036<0443:VOSTMR>2.0.CO;2
Publisher site
See Article on Publisher Site

Abstract

A mixed lognormal distribution is fit to rain-rate data for the purpose of estimating the space––time mean. Using Fisher information, the large sample variance is obtained for grouped and ungrouped data estimates. The asymptotic variance results are used in deriving the efficiency of the grouped data estimator as a function of the mixed lognormal parameters. The method is applied to data from the Tropical Ocean Global Atmosphere Coupled Ocean––Atmosphere Response Experiment binned into 2 km ×× 2 km and 4 km ×× 4 km pixels. The variance of estimators is smaller for the 4 km ×× 4 km case, indicating that the lognormal model is more appropriate for the lower-resolution data.

Journal

Journal of Applied Meteorology – American Meteorological Society

Published: Feb 1, 1996

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