Vertically integrated liquid: Difference between revisions

Latest revision as of 01:37, 29 March 2024

(Abbreviated VIL.) Vertical integral of liquid water content obtained from radar observations at different elevation angles within a precipitation echo; has dimensions of mass per unit area.

Liquid water content M is computed from the equivalent reflectivity factor Z_e using the Marshall–Palmer drop-size distribution and is expressed as

where the units of M are grams per cubic meter and Z_e has its conventional units (mm⁶ m^-3). The presence of hail in a storm produces larger VIL values than otherwise would be expected. VIL values greater than a threshold value are used to indicate the presence of large hail or other types of severe weather. The threshold value varies geographically, seasonally, and daily with changing environmental conditions.

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+|Display title=vertically integrated liquid
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+|Meaning=(Abbreviated VIL.) Vertical integral of liquid [[water content]] obtained  from [[radar]] observations at different [[elevation]] angles within a [[precipitation echo]]; has [[dimensions]]  of mass per unit area.
-<div class="termentry">
+|Explanation=Liquid water content ''M'' is computed from the [[equivalent reflectivity factor]] ''Z''<sub>''e''</sub> using the  [[Marshall&ndash;Palmer relation|Marshall&ndash;Palmer]] drop-size distribution and is expressed as  <blockquote>[[File:ams2001glos-Ve13.gif|link=|center|ams2001glos-Ve13]]</blockquote> where the units of ''M'' are grams per cubic meter and ''Z''<sub>''e''</sub> has its conventional units (mm<sup>6</sup> m<sup>-3</sup>). The  presence of [[hail]] in a [[storm]] produces larger VIL values than otherwise would be expected. VIL  values greater than a threshold value are used to indicate the presence of large hail or other types  of [[severe weather]]. The threshold value varies geographically, seasonally, and daily with changing  environmental conditions.
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-== vertically integrated liquid ==
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-  </div>
-<div class="definition"><div class="short_definition">(Abbreviated VIL.) Vertical integral of liquid [[water content]] obtained  from [[radar]] observations at different [[elevation]] angles within a [[precipitation echo]]; has [[dimensions]]  of mass per unit area.</div><br/> <div class="paragraph">Liquid water content ''M'' is computed from the [[equivalent reflectivity factor]] ''Z''<sub>''e''</sub> using the  [[Marshall&ndash;Palmer]] drop-size distribution and is expressed as  <div class="display-formula"><blockquote>[[File:ams2001glos-Ve13.gif|link=|center|ams2001glos-Ve13]]</blockquote></div> where the units of ''M'' are grams per cubic meter and ''Z''<sub>''e''</sub> has its conventional units (mm<sup>6</sup> m<sup>-3</sup>). The  presence of [[hail]] in a [[storm]] produces larger VIL values than otherwise would be expected. VIL  values greater than a threshold value are used to indicate the presence of large hail or other types  of [[severe weather]]. The threshold value varies geographically, seasonally, and daily with changing  environmental conditions.</div><br/> </div>
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