Precipitable water: Difference between revisions
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{{DISPLAYTITLE:precipitable water}} | |||
(''Or'' precipitable water vapor.) The total atmospheric [[water vapor]] contained in a vertical column of unit cross-sectional area extending between any two specified levels, commonly expressed in terms of the height to which that water substance would stand if completely condensed and collected in a vessel of the same unit [[cross section]].<br/> The total precipitable water is that contained in a column of unit cross section extending all of the way from the earth's surface to the "top" of the [[atmosphere]]. Mathematically, if ''x''(''p'') is the [[mixing ratio]] at the [[pressure]] level, ''p'', then the precipitable water vapor, ''W'', contained in a layer bounded by pressures ''p''<sub>1</sub> and ''p''<sub>2</sub> is given by | (''Or'' precipitable water vapor.) The total atmospheric [[water vapor]] contained in a vertical column of unit cross-sectional area extending between any two specified levels, commonly expressed in terms of the height to which that water substance would stand if completely condensed and collected in a vessel of the same unit [[cross section]].<br /> The total precipitable water is that contained in a column of unit cross section extending all of the way from the earth's surface to the "top" of the [[atmosphere]]. Mathematically, if ''x''(''p'') is the [[mixing ratio]] at the [[pressure]] level, ''p'', then the precipitable water vapor, ''W'', contained in a layer bounded by pressures ''p''<sub>1</sub> and ''p''<sub>2</sub> is given by<blockquote>[[File:PrecipWater.png|center|200px]]</blockquote> where ''ρ'' represents the density of water and ''g'' is the [[acceleration of gravity]]. In actual rainstorms, particularly thunderstorms, amounts of [[rain]] very often exceed the total precipitable water vapor of the overlying atmosphere. This results from the action of [[convergence]] that brings into the rainstorm the water vapor from a surrounding area that is often quite large. Nevertheless, there is general [[correlation]] between [[precipitation]] amounts in given storms and the precipitable water vapor of the [[air masses]] involved in those storms. | ||
== agua precipitable == | == agua precipitable == |
Latest revision as of 09:46, 4 April 2024
(Or precipitable water vapor.) The total atmospheric water vapor contained in a vertical column of unit cross-sectional area extending between any two specified levels, commonly expressed in terms of the height to which that water substance would stand if completely condensed and collected in a vessel of the same unit cross section.
The total precipitable water is that contained in a column of unit cross section extending all of the way from the earth's surface to the "top" of the atmosphere. Mathematically, if x(p) is the mixing ratio at the pressure level, p, then the precipitable water vapor, W, contained in a layer bounded by pressures p1 and p2 is given by
where ρ represents the density of water and g is the acceleration of gravity. In actual rainstorms, particularly thunderstorms, amounts of rain very often exceed the total precipitable water vapor of the overlying atmosphere. This results from the action of convergence that brings into the rainstorm the water vapor from a surrounding area that is often quite large. Nevertheless, there is general correlation between precipitation amounts in given storms and the precipitable water vapor of the air masses involved in those storms.
agua precipitable[edit | edit source]
(O vapor de agua precipitable). Es el vapor de agua atmosférico total contenido en una columna vertical de área de sección transversal unitaria que se extiende entre dos niveles especificados cualesquiera, comúnmente expresada en términos de la altura a la que dicha sustancia acuosa se mantendría si se condensara completamente y se recogiera en un recipiente de la misma sección transversal unitaria.
El agua precipitable total es la que se contiene en una columna de sección transversal unitaria que se extiende desde la superficie de la tierra hasta la "parte superior" de la atmósfera. Matemáticamente, si x(p) es la proporción de mezcla al nivel de presión, p, entonces el vapor de agua precipitable, W, contenido en una capa limitada por las presiones p1 y p2 está dada por
donde ρ representa la densidad del agua y g es la aceleración gravitacional. En las tormentas de lluvia reales, particularmente en tormentas eléctricas, la cantidad de lluvia a menudo supera el vapor de agua precipitable total de la atmósfera suprayacente. Lo anterior resulta de la acción de convergencia que lleva a la tormenta el vapor de agua de un área circundante, que a menudo es bastante grande. Sin embargo, existe una correlación general entre las cantidades de precipitación en tormentas dadas y el vapor de agua precipitable de las masas de aire involucradas en dichas tormentas.
term edited 13Jan15