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Severe weather precursors in the lig...

Gatlin, Patrick.

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Severe weather precursors in the lightning activity of Tennessee Valley thunderstorms.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Severe weather precursors in the lightning activity of Tennessee Valley thunderstorms./
作者:	Gatlin, Patrick.
面頁冊數:	98 p.
附註:	Adviser: Steven Goodman.
Contained By:	Masters Abstracts International46-01.
標題:	Atmospheric Sciences. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1445431
ISBN:	9780549129332

Severe weather precursors in the lightning activity of Tennessee Valley thunderstorms.
Gatlin, Patrick.

Severe weather precursors in the lightning activity of Tennessee Valley thunderstorms. - 98 p.

Adviser: Steven Goodman.

Thesis (M.S.)--The University of Alabama in Huntsville, 2007.

Rapid increases in the total lightning activity prior to the onset of severe weather have been observed in Florida, Oklahoma, and Alabama thunderstorms. However, the connection between this pronounced total lightning trend (the lightning jump), storm kinematics and severe weather is not well understood.

ISBN: 9780549129332Subjects--Topical Terms:

1019179
Atmospheric Sciences.

Severe weather precursors in the lightning activity of Tennessee Valley thunderstorms.
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520 $a Rapid increases in the total lightning activity prior to the onset of severe weather have been observed in Florida, Oklahoma, and Alabama thunderstorms. However, the connection between this pronounced total lightning trend (the lightning jump), storm kinematics and severe weather is not well understood.
520 $a The total lightning activity tornadic and non-tornadic thunderstorms was compared with radar reflectivity and Doppler-derived velocity, shear, and momentum. An algorithm was developed to detect lightning jumps and quantify their utility in severe weather identification. Nearly all severe storms studied produced total flash rates in excess of 60 flashes min-1 and lightning jumps. In the tornadic thunderstorms, the lightning jump is the dominant electrical response during tornadogenesis, preceding descending and non-descending tornadoes by 18 to 28 min. Lightning jumps used alone as severe weather predictors resulted in a probability of detection of 0.985, a false alarm rate of 0.446, and critical success index of 0.549.
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