Storm-relative environmental helicity: Difference between revisions

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|Meaning=(Abbreviated SREH.) A measure of the [[streamwise vorticity]]  within the [[inflow]] environment of a [[convective storm]].
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|Explanation=It is calculated by multiplying the storm-relative inflow velocity [[vector]] by the [[streamwise vorticity|streamwise  vorticity]] and integrating this quantity over the inflow depth. Geometrically, the storm-relative  environmental helicity is represented by the area on a [[hodograph]] swept out by the storm-relative  [[wind]] vectors between specified levels (typically the surface and 3 km to represent the primary  [[storm]] inflow). It is thought to be a measure of the tendency of a [[supercell]] to rotate.
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== storm-relative environmental helicity ==
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<div class="definition"><div class="short_definition">(Abbreviated SREH.) A measure of the [[streamwise vorticity]]  within the [[inflow]] environment of a [[convective storm]].</div><br/> <div class="paragraph">It is calculated by multiplying the storm-relative inflow velocity [[vector]] by the [[streamwise  vorticity]] and integrating this quantity over the inflow depth. Geometrically, the storm-relative  environmental helicity is represented by the area on a [[hodograph]] swept out by the storm-relative  [[wind]] vectors between specified levels (typically the surface and 3 km to represent the primary  [[storm]] inflow). It is thought to be a measure of the tendency of a [[supercell]] to rotate.</div><br/> </div>
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Latest revision as of 07:30, 30 March 2024

(Abbreviated SREH.) A measure of the streamwise vorticity within the inflow environment of a convective storm.

It is calculated by multiplying the storm-relative inflow velocity vector by the streamwise vorticity and integrating this quantity over the inflow depth. Geometrically, the storm-relative environmental helicity is represented by the area on a hodograph swept out by the storm-relative wind vectors between specified levels (typically the surface and 3 km to represent the primary storm inflow). It is thought to be a measure of the tendency of a supercell to rotate.

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