Articles | Volume 30, issue 17
https://doi.org/10.5194/hess-30-5593-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-30-5593-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
08 Sep 2026
Research article |
| 08 Sep 2026
| 08 Sep 2026
Towards a global actual evapotranspiration product for the Copernicus Land Monitoring Service
DHI A/S, Agern Alle 5, 2970 Hørsholm, Denmark
Héctor Nieto
Instituto de Ciencias Agrarias (ICA-CSIC), C/ Serrano 115b, 28006 Madrid, Spain
José Miguel Barrios
Department of Meteorological and Climatological Research, Royal Meteorological Institute, Ringlaan 3, 1180 Brussels, Belgium
Walid Ghariani
DHI A/S, Agern Alle 5, 2970 Hørsholm, Denmark
Francoise Gellens-Meulenberghs
Department of Meteorological and Climatological Research, Royal Meteorological Institute, Ringlaan 3, 1180 Brussels, Belgium
Jan De Pue
Department of Meteorological and Climatological Research, Royal Meteorological Institute, Ringlaan 3, 1180 Brussels, Belgium
Roselyne Lacaze
HYGEOS, Euratechnologies, 165 avenue de Bretagne 59000 Lille, France
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Manuel Quintanilla-Albornoz, Xavier Miarnau, Ana Pelechá, Héctor Nieto, and Joaquim Bellvert
Hydrol. Earth Syst. Sci., 28, 4797–4818, https://doi.org/10.5194/hess-28-4797-2024, https://doi.org/10.5194/hess-28-4797-2024, 2024
Short summary
Short summary
Remote sensing can be a helpful tool for monitoring crop transpiration (T) for agricultural water management. Since remote sensing provides instantaneous data, upscaling techniques are required to estimate T on a daily scale. This study assesses optimal image acquisition times and four upscaling approaches to estimate daily T. The results indicate that the main errors derive from measurement time and water stress levels, which can be mitigated by choosing a proper upscaling approach.
Jan De Pue, Sebastian Wieneke, Ana Bastos, José Miguel Barrios, Liyang Liu, Philippe Ciais, Alirio Arboleda, Rafiq Hamdi, Maral Maleki, Fabienne Maignan, Françoise Gellens-Meulenberghs, Ivan Janssens, and Manuela Balzarolo
Biogeosciences, 20, 4795–4818, https://doi.org/10.5194/bg-20-4795-2023, https://doi.org/10.5194/bg-20-4795-2023, 2023
Short summary
Short summary
The gross primary production (GPP) of the terrestrial biosphere is a key source of variability in the global carbon cycle. To estimate this flux, models can rely on remote sensing data (RS-driven), meteorological data (meteo-driven) or a combination of both (hybrid). An intercomparison of 11 models demonstrated that RS-driven models lack the sensitivity to short-term anomalies. Conversely, the simulation of soil moisture dynamics and stress response remains a challenge in meteo-driven models.
Jan De Pue, José Miguel Barrios, Liyang Liu, Philippe Ciais, Alirio Arboleda, Rafiq Hamdi, Manuela Balzarolo, Fabienne Maignan, and Françoise Gellens-Meulenberghs
Biogeosciences, 19, 4361–4386, https://doi.org/10.5194/bg-19-4361-2022, https://doi.org/10.5194/bg-19-4361-2022, 2022
Short summary
Short summary
The functioning of ecosystems involves numerous biophysical processes which interact with each other. Land surface models (LSMs) are used to describe these processes and form an essential component of climate models. In this paper, we evaluate the performance of three LSMs and their interactions with soil moisture and vegetation. Though we found room for improvement in the simulation of soil moisture and drought stress, the main cause of errors was related to the simulated growth of vegetation.
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Short summary
We present the design of an actual evapotranspiration product which joined the Copernicus Land Monitoring Service portfolio in December 2025. The product relies on free and open data and advanced modelling methods and has global coverage with a 300 m pixel resolution. A prototype dataset was compared against measurements from 206 geographically distributed stations, achieving good results. Such product will find multiple uses, including in water resources management and food security fields.
We present the design of an actual evapotranspiration product which joined the Copernicus Land...
