NDLI: P 15 R . 6 Simulated Wsr-88 D Measurements of Low-reflectivity Eyes Associated with Tornadoes

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P 15 R . 6 Simulated Wsr-88 D Measurements of Low-reflectivity Eyes Associated with Tornadoes

Content Provider	Semantic Scholar
Author	Wood, Vincent T. Brown, Rodger A. Dowell, David C.
Copyright Year	2005
Abstract	In the last several years, proximity radar observations of tornadoes by mobile Doppler radars have revealed details about the three-dimensional structures of tornado vortex, including spiral bands of reflectivity surrounding a low-reflectivity eye coincident with the center of the vortex (Bluestein and Pazmany 2000; Wurman and Gill 2000; Wurman 2002; Alexander and Wurman 2005). The low-reflectivity eye typically is not visible in Weather Surveillance Radar1988 (WSR-88D) observations because the radars are much farther away from tornadoes than are the mobile radars. Current-resolution reflectivity data collected by the WSR-88Ds have an azimuthal spacing of 1.0 and range spacing of 1.0 km for reflectivity (Crum and Alberty 1993; Crum et al. 1993). The presence of the low-reflectivity eye would be more apparent if WSR-88Ds displayed finer-resolution data. To examine this possibility, we use the high-resolution tornado numerical model of Dowell et al. (2005) and a simulated WSR-88D. Our approach involves decreasing (a) the azimuthal sampling interval from the conventional 1.0 to 0.5, and (b) the range spacing from the conventional 1.0 km to 0.25 km. Simulated Doppler measurements are produced by scanning a simulated Doppler radar through the high-resolution numerical model of a mature tornado having a low-reflectivity eye coincident with the center of the tornado vortex. We compare displays of current-resolution simulated WSR-88D reflectivity signatures with displays showing simulated finer-resolution signatures.
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://ams.confex.com/ams/pdfpapers/95820.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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