Evidence for accretional drop growth in shallow tropical convection based on four-dimensional dual Doppler radar data

Marcin J. Szumowski, Robert M. Rauber, Harry T. Ochs

Research output: Contribution to conferencePaper

Abstract

The range of conditions under which drops could grow by accretion of cloud water from ultragiant CCN to observed 4-8 mm diameters is determined during a simple up-down trajectory through shallow Hawaiian clouds. A Lagrangian drop-growth trajectory model applied within dual-Doppler four-dimensional kinematic fields collected on the Hawaiian Rainband Project. The fields provided realistic time scales and magnitudes of convective updrafts, and also considered the horizontal flow variations that can transport drops into and out of updrafts. Sensitivity studies for the August 1990 case showed that it is possible for raindrops to grow large on ultragiant nuclei by accretion of cloud water alone during a single up-down trajectory.

Original languageEnglish (US)
Pages384-385
Number of pages2
StatePublished - Dec 1 1997
EventProceedings of the 1997 28th Conference on Radar Meteorology - Austin, TX, USA
Duration: Sep 7 1997Sep 12 1997

Other

OtherProceedings of the 1997 28th Conference on Radar Meteorology
CityAustin, TX, USA
Period9/7/979/12/97

ASJC Scopus subject areas

  • Atmospheric Science
  • Electrical and Electronic Engineering

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    Szumowski, M. J., Rauber, R. M., & Ochs, H. T. (1997). Evidence for accretional drop growth in shallow tropical convection based on four-dimensional dual Doppler radar data. 384-385. Paper presented at Proceedings of the 1997 28th Conference on Radar Meteorology, Austin, TX, USA, .