A study of the threshold method utilizing raingage data

D. A. Short, D. B. Wolff, D. Rosenfeld, D. Atlas

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

In this study, the impact of RRD (rain-rate distribution) variations on the threshold method is shown in an analysis of 1-min rain-rate data from a network of tipping-bucket gauges in Darwin, Australia. Data are analyzed for two distinct regimes: the premonsoon environment, having isolated intense thunderstorms, and the active monsoon rains, having organized convective cell clusters that generate large areas of stratiform rain. It is found that a threshold of 10 mm h-1 results in the same threshold coefficient for both regimes, suggesting an alternative definition of optimal threshold as that which is least sensitive to distribution variations. The observed behavior of the threshold coefficient is well simulated by assumption of lognormal distributions with different scale parameters and same shape parameters. -from Authors

Original languageEnglish
Pages (from-to)1379-1387
Number of pages9
JournalJournal of Applied Meteorology
Volume32
Issue number8
DOIs
StatePublished - 1993
Externally publishedYes

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