Modern Meteorology; An Outline Of The Growth And Present Condition Of Some Of Its Phases

Paperback | May 10, 2012

byFrank Waldo

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1893 Excerpt: ...occur only when the rain does not fall, but is carried along with the current until changes in pressure cause re-evaporation to take place, and the moisture again exists as a vapour. In the case where the raindrops leave the mass of air by descent, as is usually the case in nature, the process of change in the condition of the air would then be what von Bezold calls pseudo-adiabatic. This potential temperature has also been illustrated by von Bezold's graphical method. For a constant pressure, the absolute temperature is proportional to the volume, or, in von Bezold's diagram, the abscissa OV. Von Bezold gives the following rule:--"For any given condition such as is represented by a in the diagram (Fig. 80) one can find the corresponding potential temperature by drawing an adiabatic through a and finding its intersecting point N' with the line P0N drawn parallel to the abscissa at the distance PQ from it. The distance of this point of intersection from the ordinate axis, that is, the abscissa of the point of intersection furnishes a measure for the potential temperature." In the dry stadium the potential temperature corresponding to any definite point of departure has a constant value, but in the stadia with precipitation the potential temperature will increase with the amount of precipitation which leaves the air mass. In the same diagram (Fig. 80) let the adiabatic of the dry stadium which passes through a intersect the dew-point curve (not shown) at b, and let further expansion of the air take place, then the path bc will be over the adiabatic (or pseudo-adiabatic) of the rain or snow stadium. If, now, it is the object to find the potential temperature for the point c (as conveniently placed on the diagram), which must be done by reduction to t...

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1893 Excerpt: ...occur only when the rain does not fall, but is carried along with the current until changes in pressure cause re-evaporation to ...

Format:PaperbackDimensions:120 pages, 9.69 × 7.44 × 0.25 inPublished:May 10, 2012Publisher:General Books LLCLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:0217317715

ISBN - 13:9780217317719

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