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Detailed Reference Information |
Winn, W.P., Hunyady, S.J. and Aulich, G.D. (1999). Pressure at the ground in a large tornado. Journal of Geophysical Research 104: doi: 10.1029/1999JD900387. issn: 0148-0227. |
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A number of instruments were placed on the ground across the path of a large tornado that passed west of the town of Allison, Texas, on June 8, 1995. The center of the tornado came within 660 m of the closest instrument, which recorded a pressure drop of 55 mbar and a subsequent pressure rise of 60 mbar. During the lowest recorded pressures (near r=660 m), there were large and rapid pressure fluctuations; the largest fluctuation was a 10-mbar spike lasting 2 s. A second instrument on the opposite side of the tornado recorded a pressure drop of 26 mbar. From the pressure variations with time P(t) at the two instruments, the variation of pressure with distance p(r) from the center of the tornado has been deduced for r>660 m. As r decreases, the measured pressure function p(r) drops more abruptly than would be expected from conservation of angular momentum of air spiraling inward near the ground level. ¿ 1999 American Geophysical Union |
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Abstract |
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Keywords
Atmospheric Composition and Structure, Pressure, density, and temperature, Meteorology and Atmospheric Dynamics, Convective processes, Meteorology and Atmospheric Dynamics, Instruments and techniques, Atmospheric Composition and Structure, Instruments and techniques, Meteorology and Atmospheric Dynamics, Remote sensing, Information Related to Geographic Region, Antarctica |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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