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Boundary layer signatures of consecutive thunderstorms as observed by Doppler sodar over western India

Latha, R and Murthy, BS (2011) Boundary layer signatures of consecutive thunderstorms as observed by Doppler sodar over western India. Atmospheric Research, 99 (2). pp. 230-240.

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Abstract

Thunderstorm development in terms of turbulence and wind fields observed using Doppler sodar (June 4-6, 2009) is presented. Vertical velocity averaged over convective hours shows net updrafts prior to thunderstorm in contrast to net downdrafts on a normal day (June 4). Moisture availability due to thundershower on June 5 helps develop another thunderstorm on June 6 even with reduced temperature and turbulent kinetic energy. Two thundershowers on June 6 at a time interval of 4. h are observed to have different triggering mechanisms; viz. convective overturning and forced uplifting of stable moist air mass by flow convergence. Shear in wind speed and/or direction prior to thunderstorm and accelerating outflow following the precipitation are the common features observed.

Item Type: Article
Additional Information: Copyright of this article belongs to Elsevier.
Uncontrolled Keywords: 3-D wind fields; Common features; Convergence; Doppler sodars; Flow convergence; Lower boundary; Moist air; Thundershower; Thunderstorm development; Time interval; Triggering mechanism; Turbulent kinetic energy; Vertical velocity; Wind field; Wind speed, Atmospheric thermodynamics; Boundary layers; Kinetic energy; Three dimensional; Thunderstorms, Wind power, boundary layer; convergence; Doppler sodar; kinetic energy; overturn; thunderstorm; turbulent boundary layer; wind field; wind velocity, India
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 27 Oct 2014 10:46
Last Modified: 27 Oct 2014 10:46
URI: http://moeseprints.incois.gov.in/id/eprint/653

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