Convective boundary layer depth estimation from S-band dual-polarization radar

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Abstract

This study investigates Bragg scatter signatures in dual-polarization radar observations, which are defined by low differential reflectivity (ZDR) values, as a proxy for convective boundary layer (CBL) depth. Using data from the WSR-88D in Twin Lakes, Oklahoma (KTLX), local minima in quasi-vertical profiles of (ZDR) are found to provide a reasonable estimate of CBL depth when compared with depth estimates from upper-air soundings from Norman, Oklahoma (KOUN), during 2014. The 243 (ZDR) Bragg scatter and upper-air sounding CBL depth estimates have a correlation of 0.90 and an RMSE of 254 m. Using Bragg scatter as a proxy for CBL depth was expanded to other seasons and locations-performing well in Wilmington, Ohio; Fairbanks, Alaska; Tucson, Arizona; Minneapolis, Minnesota; Albany, New York; Portland, Oregon; and Tampa, Florida-showing its potential usefulness in monitoring CBL depth throughout the year in a variety of geographic locations and meteorological conditions.

Original languageEnglish (US)
Pages (from-to)1723-1733
Number of pages11
JournalJournal of Atmospheric and Oceanic Technology
Volume35
Issue number8
DOIs
StatePublished - Aug 1 2018

All Science Journal Classification (ASJC) codes

  • Ocean Engineering
  • Atmospheric Science

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