Preprints
https://doi.org/10.5194/amt-2022-50
https://doi.org/10.5194/amt-2022-50
 
25 Feb 2022
25 Feb 2022
Status: this preprint is currently under review for the journal AMT.

The Impact of Environmental Variables on UAS-based Atmospheric Carbon Dioxide Measurements

Gustavo B. H. de Azevedo1,2,a, Bill Doyle2, Christopher A. Fiebrich3, and David Schvartzman1 Gustavo B. H. de Azevedo et al.
  • 1Advanced Radar Research Center (ARRC) at The University of Oklahoma
  • 2Center for Autonomous Sensing and Sampling (CASS) at The University of Oklahoma
  • 3Oklahoma Mesonet, Oklahoma Climatological Survey at The University of Oklahoma
  • anow at: Unmanned Systems Research Institute at Oklahoma State University (OSU)

Abstract. This article assesses the individual impact of pressure, temperature, and humidity on the accuracy of atmospheric CO2 measurements collected by Unmanned Aerial Systems (UAS) using low-cost commercial Non-Dispersive Infrared sensors (NDIR). We build upon previous experimental results in the literature and systematically increase the variation range for each environmental variable to match the abrupt changes found in UAS vertical profiles. As a key contribution, we present a low-cost benchtop correction procedure to mitigate the impact of these variables and considerably improve the accuracy of CO2 measurements to be within ±2.5 ppm. Our findings support the use of low-cost NDIR sensors for UAS-based atmospheric CO2 measurements as a complementary in-situ tool for many scientific applications.

Gustavo B. H. de Azevedo et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on amt-2022-50', Anonymous Referee #1, 09 Apr 2022
  • RC2: 'Comment on amt-2022-50', Anonymous Referee #2, 24 Apr 2022

Gustavo B. H. de Azevedo et al.

Gustavo B. H. de Azevedo et al.

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Short summary
Strong changes in pressure, temperature, and humidity occur when small scientific aircraft ascend through the atmosphere to measure carbon dioxide. These strong changes can produce errors in the carbon dioxide measurements. To avoid these errors, we present a low-cost correction method. This low-cost method allows more researchers to study atmospheric carbon dioxide, reducing entry barriers in this field.