Preprints
https://doi.org/10.5194/hess-2024-85
https://doi.org/10.5194/hess-2024-85
15 Apr 2024
 | 15 Apr 2024
Status: this preprint is currently under review for the journal HESS.

Estimating Bowen Index in urban environment based on Landsat 8/9 imagery

Tereza Pohanková and Vilém Pechanec

Abstract. This study explores the Olomouc region’s thermal dynamics and energy balance in northeastern Czech Republic during the spring and summer of 2022. Using Landsat 8 and Landsat 9 imagery, meteorological data and the S-SEBI model to determine Bowen Index (BI). Analysis of Solar Net Radiation and Sensible and Latent Heat Fluxes contributes to our understanding of energy exchanges at the surface. The S-SEBI algorithm helps determine Bowen Index, highlighting patterns across land cover classes. Urban and artificial areas consistently exhibit higher Bowen Index values, suggesting a higher sensible heat flux. Areas with vegetation showcase lower BI values, indicating the dominance of latent heat flux and the cooling effect of vegetation. Temporal trends in BI vary during specific sensing days. Despite challenges associated with atmospheric variability, our integration of meteorological data and remote sensing techniques contributes to understanding the local climate. Validation with EUMETSAT evaluation data indicates a consistent relationship with some biases, implying potential reliability of our approach and the derived heat fluxes and Bowen Index values.

Publisher's note: Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this preprint. The responsibility to include appropriate place names lies with the authors.
Tereza Pohanková and Vilém Pechanec

Status: open (until 10 Jun 2024)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on hess-2024-85', X. W. Shen, 30 Apr 2024 reply
    • AC2: 'Reply on CC1', Tereza Pohanková, 22 May 2024 reply
  • RC1: 'Comment on hess-2024-85', Anonymous Referee #1, 01 May 2024 reply
    • AC1: 'Reply on RC1', Tereza Pohanková, 03 May 2024 reply
  • RC2: 'Comment on hess-2024-85', Anonymous Referee #2, 10 May 2024 reply
Tereza Pohanková and Vilém Pechanec
Tereza Pohanková and Vilém Pechanec

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Short summary
The research talks about thermal dynamics and energy balance of the Olomouc region in the Czech Republic during spring and summer 2022 using Landsat imagery and meteorological data Our findings reveal distinct patterns in Bowen Index values across different land cover classes, with urban areas exhibiting higher sensible heat flux. This study shows the interplay of environmental factors and offers insights crucial for local climate studies and spatial planning.