Reversal temperature: Difference between revisions
From Glossary of Meteorology
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<div class="definition"><div class="short_definition">The observed [[temperature]] at which the charge transferred to riming [[graupel]] particles during collisions with [[ice crystals]] in [[thunderstorms]] reverses sign.</div><br/> <div class="paragraph">The reversal temperature is affected by the [[cloud]] liquid [[water content]] such that graupel charges positively (negatively) at high (low) liquid water contents and [[temperatures]] above (below) the reversal temperature. The process can account for the positive charging of ice crystals carried to the top of the clouds, for the negative charge region typically at temperatures between | <div class="definition"><div class="short_definition">The observed [[temperature]] at which the charge transferred to riming [[graupel]] particles during collisions with [[ice crystals]] in [[thunderstorms]] reverses sign.</div><br/> <div class="paragraph">The reversal temperature is affected by the [[cloud]] liquid [[water content]] such that graupel charges positively (negatively) at high (low) liquid water contents and [[temperatures]] above (below) the reversal temperature. The process can account for the positive charging of ice crystals carried to the top of the clouds, for the negative charge region typically at temperatures between -10° and -20°C, and for the lower positive charge center.</div><br/> </div> | ||
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Latest revision as of 15:00, 20 February 2012
reversal temperature
The observed temperature at which the charge transferred to riming graupel particles during collisions with ice crystals in thunderstorms reverses sign.
The reversal temperature is affected by the cloud liquid water content such that graupel charges positively (negatively) at high (low) liquid water contents and temperatures above (below) the reversal temperature. The process can account for the positive charging of ice crystals carried to the top of the clouds, for the negative charge region typically at temperatures between -10° and -20°C, and for the lower positive charge center.
