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  Calculating the vertical column density of O4 during daytime from surface values of pressure, temperature, and relative humidity

Beirle, S., Borger, C., Dörner, S., Kumar, V., & Wagner, T. (2022). Calculating the vertical column density of O4 during daytime from surface values of pressure, temperature, and relative humidity. Atmospheric Measurement Techniques, 15(4), 987-1006. doi:10.5194/amt-15-987-2022.

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 Creators:
Beirle, Steffen1, Author              
Borger, Christian1, Author              
Dörner, Steffen1, Author              
Kumar, Vinod1, Author              
Wagner, Thomas1, Author              
Affiliations:
1Satellite Remote Sensing, Max Planck Institute for Chemistry, Max Planck Society, ou_1826293              

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 Abstract: We present a formalism that relates the vertical column density (VCD) of the oxygen collision complex O2–O2 (denoted as O4 below) to surface (2 m) values of temperature and pressure, based on physical laws. In addition, we propose an empirical modification which also accounts for surface relative humidity (RH). This allows for simple and quick calculation of the O4 VCD without the need for constructing full vertical profiles. The parameterization reproduces the true O4 VCD, as derived from vertically integrated profiles, within (mean ± SD) for Weather Research and Forecasting (WRF) simulations around Germany, 0.2±1.8 % for global reanalysis data (ERA5), and for Global Climate Observing System (GCOS) Reference Upper-Air Network (GRUAN) radiosonde measurements around the world. When applied to measured surface values, uncertainties of 1 K, 1 hPa, and 16 % for temperature, pressure, and RH correspond to relative uncertainties of the O4 VCD of 0.3 %, 0.2 %, and 1 %, respectively. The proposed parameterization thus provides a simple and accurate formula for the calculation of the O4 VCD which is expected to be useful in particular for MAX-DOAS applications.

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Language(s): eng - English
 Dates: 2022-02-24
 Publication Status: Published online
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: ISI: 000763261800001
DOI: 10.5194/amt-15-987-2022
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Title: Atmospheric Measurement Techniques
  Abbreviation : AMT
Source Genre: Journal
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Publ. Info: Göttingen : European Geosciences Union, Copernicus
Pages: - Volume / Issue: 15 (4) Sequence Number: - Start / End Page: 987 - 1006 Identifier: ISSN: 1867-1381
CoNE: https://pure.mpg.de/cone/journals/resource/1867-1381