Difference between revisions of "Wet-bulb temperature"

From Glossary of Meteorology
imported>Perlwikibot
 
Line 10: Line 10:
  
 
#<div class="definition"><div class="short_definition">Isobaric wet-bulb temperature: the [[temperature]] an [[air parcel]] would  have if cooled adiabatically to [[saturation]] at constant [[pressure]] by [[evaporation]] of water into it,  all [[latent heat]] being supplied by the parcel.</div><br/> </div>
 
#<div class="definition"><div class="short_definition">Isobaric wet-bulb temperature: the [[temperature]] an [[air parcel]] would  have if cooled adiabatically to [[saturation]] at constant [[pressure]] by [[evaporation]] of water into it,  all [[latent heat]] being supplied by the parcel.</div><br/> </div>
#<div class="definition"><div class="short_definition">Adiabatic wet-bulb temperature (<br/>''or'' pseudo wet-bulb temperature): the [[temperature]] an [[air parcel|air  parcel]] would have if cooled adiabatically to [[saturation]] and then compressed adiabatically to the  original [[pressure]] in a [[moist-adiabatic process]].</div><br/> <div class="paragraph">This is the wet-bulb temperature as read off the [[thermodynamic diagram]] and is always less  than the [[isobaric wet-bulb temperature]], usually by a fraction of a [[degree]] centigrade.</div><br/> </div>
+
#<div class="definition"><div class="short_definition">Adiabatic wet-bulb temperature (''or'' pseudo wet-bulb temperature): the [[temperature]] an [[air parcel|air  parcel]] would have if cooled adiabatically to [[saturation]] and then compressed adiabatically to the  original [[pressure]] in a [[moist-adiabatic process]].</div><br/> <div class="paragraph">This is the wet-bulb temperature as read off the [[thermodynamic diagram]] and is always less  than the [[isobaric wet-bulb temperature]], usually by a fraction of a [[degree]] centigrade.</div><br/> </div>
 
#<div class="definition"><div class="short_definition">The [[temperature]] read from the [[wet-bulb thermometer]].</div><br/> </div>
 
#<div class="definition"><div class="short_definition">The [[temperature]] read from the [[wet-bulb thermometer]].</div><br/> </div>
 
</div>
 
</div>

Latest revision as of 11:57, 17 June 2021



wet-bulb temperature

  1. Isobaric wet-bulb temperature: the temperature an air parcel would have if cooled adiabatically to saturation at constant pressure by evaporation of water into it, all latent heat being supplied by the parcel.

  2. Adiabatic wet-bulb temperature (or pseudo wet-bulb temperature): the temperature an air parcel would have if cooled adiabatically to saturation and then compressed adiabatically to the original pressure in a moist-adiabatic process.

    This is the wet-bulb temperature as read off the thermodynamic diagram and is always less than the isobaric wet-bulb temperature, usually by a fraction of a degree centigrade.



Copyright 2022 American Meteorological Society (AMS). For permission to reuse any portion of this work, please contact permissions@ametsoc.org. Any use of material in this work that is determined to be “fair use” under Section 107 of the U.S. Copyright Act (17 U.S. Code § 107) or that satisfies the conditions specified in Section 108 of the U.S.Copyright Act (17 USC § 108) does not require AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a website or in a searchable database, or other uses of this material, except as exempted by the above statement, require written permission or a license from AMS. Additional details are provided in the AMS Copyright Policy statement.