Stomatal resistance: Difference between revisions
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<div class="definition"><div class="short_definition">The opposition to [[transport]] of quantities such as [[water vapor]] and [[carbon dioxide]] to or from the stomata (pores) on the leaves of plants.</div><br/> <div class="paragraph">For water vapor, stomatal resistance ''r'' is defined as <div class="display-formula"><blockquote>[[File:ams2001glos-Se74.gif|link=|center|ams2001glos-Se74]]</blockquote></div> where ''q''<sub>''i''</sub> and ''q''<sub>''s''</sub> are the [[specific humidities]] in the interior of the stomate cavity and at the exterior surface of the leaf, ρ is air density, and ''E'' is the [[moisture flux]]. The dimension of ''r'' is time per distance, that is, inverse [[velocity]]. This equation is analogous to that for an electrical [[resistance]], proportional to the ratio of voltage [[potential]] divided by [[current]] flow. <br/>''See'' [[transpiration]].</div><br/> </div><div class="reference">Oke, T. R. 1987. Boundary Layer Climates. chap. 4. </div><br/> | <div class="definition"><div class="short_definition">The opposition to [[transport]] of quantities such as [[water vapor]] and [[carbon dioxide|carbon dioxide]] to or from the stomata (pores) on the leaves of plants.</div><br/> <div class="paragraph">For water vapor, stomatal resistance ''r'' is defined as <div class="display-formula"><blockquote>[[File:ams2001glos-Se74.gif|link=|center|ams2001glos-Se74]]</blockquote></div> where ''q''<sub>''i''</sub> and ''q''<sub>''s''</sub> are the [[specific humidities]] in the interior of the stomate cavity and at the exterior surface of the leaf, ρ is air density, and ''E'' is the [[moisture flux]]. The dimension of ''r'' is time per distance, that is, inverse [[velocity]]. This equation is analogous to that for an electrical [[resistance]], proportional to the ratio of voltage [[potential]] divided by [[current]] flow. <br/>''See'' [[transpiration]].</div><br/> </div><div class="reference">Oke, T. R. 1987. Boundary Layer Climates. chap. 4. </div><br/> | ||
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Latest revision as of 16:59, 25 April 2012
stomatal resistance
The opposition to transport of quantities such as water vapor and carbon dioxide to or from the stomata (pores) on the leaves of plants.
For water vapor, stomatal resistance r is defined as where qi and qs are the specific humidities in the interior of the stomate cavity and at the exterior surface of the leaf, ρ is air density, and E is the moisture flux. The dimension of r is time per distance, that is, inverse velocity. This equation is analogous to that for an electrical resistance, proportional to the ratio of voltage potential divided by current flow.
See transpiration.
See transpiration.
Oke, T. R. 1987. Boundary Layer Climates. chap. 4.
