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Scale Dependence of Spatiotemporal Intermittence of RainIt is a common experience that rainfall is intermittent in space and time. This is reflected by the fact that the statistics of area- and/or time-averaged rain rate is described by a mixed distribution with a nonzero probability of having a sharp value zero. In this paper we have explored the dependence of the probability of zero rain on the averaging space and time scales in large multiyear data sets based on radar and rain gauge observations. A stretched exponential fannula fits the observed scale dependence of the zero-rain probability. The proposed formula makes it apparent that the space-time support of the rain field is not quite a set of measure zero as is sometimes supposed. We also give an ex.planation of the observed behavior in tenus of a simple probabilistic model based on the premise that rainfall process has an intrinsic memory.
Document ID
20120012433
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Kundu, Prasun K.
(Maryland Univ. Baltimore, MD, United States)
Siddani, Ravi K.
(Merck and Co., Inc. Kenilworth, NJ, United States)
Date Acquired
August 26, 2013
Publication Date
August 20, 2011
Publication Information
Publication: Water Resources Research
Volume: 47
Subject Category
Meteorology And Climatology
Distribution Limits
Public
Copyright
Other

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