Vertical air motion and raindrop size distributions in convective systems using a 94 GHz radar

Pavlos Kollias, R. Lhermitte, B. A. Albrecht

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

This paper presents a method for the observation of air vertical velocity and raindrop size distribution in convective storms, based on the interpretation of Mie backscattering oscillations seen in the Doppler spectrum observed at vertical incidence with a 94 GHz Doppler radar. The location of the first minimum allows an accurate determination of vertical air motion, which is used to shift the spectrum so that it relates to the raindrops terminal velocity alone. The drop size distribution is then retrieved from the shifted Doppler spectrum. An example of the structure of two-dimensional updrafts and downdrafts observed in the low levels of a convective storm is presented. Drop size distributions can also be estimated and evidence of small drop removal by the updraft is presented.

Original languageEnglish (US)
Pages (from-to)3109-3112
Number of pages4
JournalGeophysical Research Letters
Volume26
Issue number20
DOIs
StatePublished - Oct 15 1999

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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