Specification of wet-day daily rainfall quantiles from the mean value

AMS Citation:
Benestad, R. E., D. Nychka, and L. O. Mearns, 2012: Specification of wet-day daily rainfall quantiles from the mean value. Tellus Series A: Dynamic Meteorology and Oceanography, 64,.
Date:2012-01-01
Resource Type:article
Title:Specification of wet-day daily rainfall quantiles from the mean value
Abstract: The characteristics associated with an exponential distribution is used as a yard stick to assess distributions for 24-hr precipitation records from 13 771 rain gauges from mainly the USA and Europe. It is shown that the daily accumulated precipitation amount is approximately similar to an exponential distribution, but not identical, and that quantiles of the distributions can to a zeroth order be specified from the mean of the wet-day precipitation. However, the data have a thicker upper tail than the exponential distribution. We propose a simple method for making a crude estimate for quantiles of wet-day 24-hr precipitation distribution, and a refinement of the exponential distribution based on principal component analysis. We also show that the high quantiles are related to the wet-day mean. The associations between the wet-day mean and quantiles from the observations are compared with results from regional climate model simulations, taken from a number of regional climate models. Similar tendencies are seen in the models as in the rain gauge data.
Peer Review:Refereed
Copyright Information:Copyright 2012 Authors. Published under license by Wiley-Blackwell. The definitive version is available at http://onlinelibrary.wiley.com.
OpenSky citable URL: ark:/85065/d7b56mb5
Author(s):
  • Rasmus Benestad
  • Doug Nychka - NCAR/UCAR
  • Linda Mearns - NCAR/UCAR
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