A new approach to estimating the sensible heat flux in bare soils

The estimation of sensible heat flux (H) in drylands is important because it constitutes a significant portion of the net available surface energy. A model to estimate H half-hourly measurements for bare soils was derived by combining the surface renewal (SR) theory and the Monin-Obukhov similarity...

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Detalhes bibliográficos
Autores: Castellví Sentís, Francesc, Agam, Nurit
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:2025
País:España
Recursos:Universitat de Lleida (UdL)
Repositório:Repositori Obert UdL
OAI Identifier:oai:repositori.udl.cat:10459.1/467968
Acesso em linha:https://doi.org/10.3390/atmos16040458
https://hdl.handle.net/10459.1/467968
Access Level:Acceso aberto
Palavra-chave:Dry climates
Bare soil
Surface renewal
Sensible heat flux
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spelling A new approach to estimating the sensible heat flux in bare soilsCastellví Sentís, FrancescAgam, NuritDry climatesBare soilSurface renewalSensible heat fluxThe estimation of sensible heat flux (H) in drylands is important because it constitutes a significant portion of the net available surface energy. A model to estimate H half-hourly measurements for bare soils was derived by combining the surface renewal (SR) theory and the Monin-Obukhov similarity theory (MOST), involving the land surface temperature (LST), wind speed, and the air temperature in a period of half an hour, HSR-LST. The surface roughness lengths for momentum (z(om)) and for heat (z(0h)) were estimated at neutral conditions. The dataset included dry climates and different measurement heights (1.5 m up to 20 m). Root mean square error (RMSE) over the mean actual sensible heat flux estimate (H-EC), E =(RMSE)/(HEC)100%, was considered excellent, good, and moderate for E values of up to 25%, 35%, and 40%, respectively. In stable conditions, HSR-LST and H-MOST values were comparable and both were unacceptable (E > 40%). However, the RMSE using HSR-LST ranged between 8 Wm(2 )and 12 Wm(2) and performed slightly better than H-MOST. In unstable conditions, HSR-LST was in excellent, good, and moderate agreement in 3, 6, and 5 cases, respectively; H-MOST was good in 3 cases; and the remaining 11 cases were intolerable because they required site-specific calibration.This work is part of the research project PID2021-124006OB-I00 funded by MCIN/AEI/10.13039/501100011033 and by the European Regional Development Fund (ERDF A way of making Europe).MDPI2025info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttps://doi.org/10.3390/atmos16040458https://hdl.handle.net/10459.1/467968reponame:Repositori Obert UdL instname:Universitat de Lleida (UdL)Inglésinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2021-124006OB-I00Reproducció del document publicat a https://doi.org/10.3390/atmos16040458Atmosphere, 2025, vol. 16, núm. 4, p. 1-12https://doi.org/10.34810/data1871cc-by (c) Castellví et al., 2025Attribution 4.0 Internationalinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/oai:repositori.udl.cat:10459.1/4679682026-06-24T12:42:17Z
dc.title.none.fl_str_mv A new approach to estimating the sensible heat flux in bare soils
title A new approach to estimating the sensible heat flux in bare soils
spellingShingle A new approach to estimating the sensible heat flux in bare soils
Castellví Sentís, Francesc
Dry climates
Bare soil
Surface renewal
Sensible heat flux
title_short A new approach to estimating the sensible heat flux in bare soils
title_full A new approach to estimating the sensible heat flux in bare soils
title_fullStr A new approach to estimating the sensible heat flux in bare soils
title_full_unstemmed A new approach to estimating the sensible heat flux in bare soils
title_sort A new approach to estimating the sensible heat flux in bare soils
dc.creator.none.fl_str_mv Castellví Sentís, Francesc
Agam, Nurit
author Castellví Sentís, Francesc
author_facet Castellví Sentís, Francesc
Agam, Nurit
author_role author
author2 Agam, Nurit
author2_role author
dc.subject.none.fl_str_mv Dry climates
Bare soil
Surface renewal
Sensible heat flux
topic Dry climates
Bare soil
Surface renewal
Sensible heat flux
description The estimation of sensible heat flux (H) in drylands is important because it constitutes a significant portion of the net available surface energy. A model to estimate H half-hourly measurements for bare soils was derived by combining the surface renewal (SR) theory and the Monin-Obukhov similarity theory (MOST), involving the land surface temperature (LST), wind speed, and the air temperature in a period of half an hour, HSR-LST. The surface roughness lengths for momentum (z(om)) and for heat (z(0h)) were estimated at neutral conditions. The dataset included dry climates and different measurement heights (1.5 m up to 20 m). Root mean square error (RMSE) over the mean actual sensible heat flux estimate (H-EC), E =(RMSE)/(HEC)100%, was considered excellent, good, and moderate for E values of up to 25%, 35%, and 40%, respectively. In stable conditions, HSR-LST and H-MOST values were comparable and both were unacceptable (E > 40%). However, the RMSE using HSR-LST ranged between 8 Wm(2 )and 12 Wm(2) and performed slightly better than H-MOST. In unstable conditions, HSR-LST was in excellent, good, and moderate agreement in 3, 6, and 5 cases, respectively; H-MOST was good in 3 cases; and the remaining 11 cases were intolerable because they required site-specific calibration.
publishDate 2025
dc.date.none.fl_str_mv 2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://doi.org/10.3390/atmos16040458
https://hdl.handle.net/10459.1/467968
url https://doi.org/10.3390/atmos16040458
https://hdl.handle.net/10459.1/467968
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2021-124006OB-I00
Reproducció del document publicat a https://doi.org/10.3390/atmos16040458
Atmosphere, 2025, vol. 16, núm. 4, p. 1-12
https://doi.org/10.34810/data1871
dc.rights.none.fl_str_mv cc-by (c) Castellví et al., 2025
Attribution 4.0 International
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
rights_invalid_str_mv cc-by (c) Castellví et al., 2025
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv reponame:Repositori Obert UdL
instname:Universitat de Lleida (UdL)
instname_str Universitat de Lleida (UdL)
reponame_str Repositori Obert UdL
collection Repositori Obert UdL
repository.name.fl_str_mv
repository.mail.fl_str_mv
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