Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 5.668 IF 5.668
  • IF 5-year value: 6.201 IF 5-year
    6.201
  • CiteScore value: 6.13 CiteScore
    6.13
  • SNIP value: 1.633 SNIP 1.633
  • IPP value: 5.91 IPP 5.91
  • SJR value: 2.938 SJR 2.938
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 174 Scimago H
    index 174
  • h5-index value: 87 h5-index 87
Preprints
https://doi.org/10.5194/acp-2020-361
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2020-361
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 04 May 2020

Submitted as: research article | 04 May 2020

Review status
This preprint is currently under review for the journal ACP.

Reappraising the appropriate calculation of a common meteorological quantity: Potential Temperature

Manuel Baumgartner1,2, Ralf Weigel2, Ulrich Achatz4, Allan H. Harvey3, and Peter Spichtinger2 Manuel Baumgartner et al.
  • 1Zentrum für Datenverarbeitung, Johannes Gutenberg University Mainz, Germany
  • 2Institute for Atmospheric Physics, Johannes Gutenberg University Mainz, Germany
  • 3Applied Chemicals and Materials Division, National Institute of Standards and Technology, Boulder, CO, USA
  • 4Institut für Atmosphäre und Umwelt, Goethe-Universität Frankfurt, Frankfurt am Main, Germany

Abstract. The potential temperature is a widely used quantity in atmospheric science since it is conserved for air's adiabatic changes of state. Its definition involves the specific heat capacity of dry air, which is traditionally assumed as constant. However, the literature provides different values of this allegedly constant parameter, which are reviewed and discussed in this study. Furthermore, we derive the potential temperature for a temperature-dependent parameterization of the specific heat capacity of dry air, thus providing a new reference potential temperature with a more rigorous basis. This new reference shows different values and vertical gradients in the upper troposphere and the stratosphere compared to the potential temperature that assumes constant heat capacity. The application of the new reference potential temperature to the prediction of gravity wave breaking altitudes reveals that the predicted wave breaking height may depend on the definition of the potential temperature used.

Manuel Baumgartner et al.

Interactive discussion

Status: open (until 29 Jun 2020)
Status: open (until 29 Jun 2020)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement

Manuel Baumgartner et al.

Manuel Baumgartner et al.

Viewed

Total article views: 171 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
132 32 7 171 1 1
  • HTML: 132
  • PDF: 32
  • XML: 7
  • Total: 171
  • BibTeX: 1
  • EndNote: 1
Views and downloads (calculated since 04 May 2020)
Cumulative views and downloads (calculated since 04 May 2020)

Viewed (geographical distribution)

Total article views: 147 (including HTML, PDF, and XML) Thereof 145 with geography defined and 2 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 

Cited

Saved

No saved metrics found.

Discussed

No discussed metrics found.
Latest update: 24 May 2020
Publications Copernicus
Download
Short summary
The potential temperature is routinely used in atmospheric science. We review its derivation and suggest a new potential temperature, based on a temperature dependent parameterization of the dry air's specific heat capacity. Moreover, we compare the new potential temperature to the common one and discuss the differences which become more important at higher altitudes. Finally, we indicate some consequences of using the new potential temperature.
The potential temperature is routinely used in atmospheric science. We review its derivation and...
Citation