Jan Polcher
YOU?
Author Swipe
View article: Simulating generic agrivoltaic systems with ORCHIDEE: Model development and multi-case study insights
Simulating generic agrivoltaic systems with ORCHIDEE: Model development and multi-case study insights Open
International audience
View article: Integrating Prediction of Precipitation and Hydrology for Early Actions: The InPRHA Project within the World Weather Research Programme
Integrating Prediction of Precipitation and Hydrology for Early Actions: The InPRHA Project within the World Weather Research Programme Open
Despite advancements in science and technology, flood prediction and preparedness remain challenging due to uncertainties in forecasting atmospheric and hydrologic processes, limited real-time data, and communication barriers. The Integrat…
View article: Identifying and Quantifying the Impact of Climatic and Non‐Climatic Drivers on River Discharge in Europe
Identifying and Quantifying the Impact of Climatic and Non‐Climatic Drivers on River Discharge in Europe Open
Our water resources have changed over the last century through a combination of water management evolution and climate change. Understanding and decomposing the drivers of discharge changes is essential to preparing and planning adaptive s…
View article: The Land surface Interactions with the Atmosphere over the Iberian Semi-arid Environment (LIAISE) Second Workshop Summary
The Land surface Interactions with the Atmosphere over the Iberian Semi-arid Environment (LIAISE) Second Workshop Summary Open
The GEWEX Quarterly is supported by the World Climate Research Programme (WCRP) and covers topics (scientific research, new programs, field campaigns....) related to the global energy and water exchanges.
View article: Modeling hydropower operations at the scale of a power grid: a demand-based approach
Modeling hydropower operations at the scale of a power grid: a demand-based approach Open
Climate change and evolving water management practices may have a significant impact on hydropower generation. While hydrological models have been widely used to assess these effects, they often present some limitations. A major challenge …
View article: Multi-objective calibration and evaluation of the ORCHIDEE land surface model over France at high resolution
Multi-objective calibration and evaluation of the ORCHIDEE land surface model over France at high resolution Open
Here we present a strategy to obtain a reliable hydrological simulation over France with the ORCHIDEE land surface model. The model is forced by the SAFRAN atmospheric reanalysis at 8 km resolution and hourly time steps from 1959 to 2020 a…
View article: Understanding the impact of human activities on the terrestrial hydrological cycle in a semi-arid bread-basket region
Understanding the impact of human activities on the terrestrial hydrological cycle in a semi-arid bread-basket region Open
Understanding the impact of human activities on the terrestrial hydrological cycle and water resources is crucial for sustainable management, particularly in regions like the Mediterranean basin which is facing increasing challenges owing …
View article: Comment on egusphere-2023-3106
Comment on egusphere-2023-3106 Open
Abstract. Climate change and evolving water management practices may have a profound impact on hydropower generation. While hydrological models have been widely used to assess these effects, they often present some limitations. A major cha…
View article: Comment on egusphere-2024-445
Comment on egusphere-2024-445 Open
Abstract. We present here a strategy to obtain a realistic hydrological simulation over France with the ORCHIDEE land surface model. The model is forced by the Safran atmospheric reanalysis at 8-km resolution and hourly time steps from 195…
View article: Multi-objective calibration and evaluation of the ORCHIDEE land surface model over France at high resolution
Multi-objective calibration and evaluation of the ORCHIDEE land surface model over France at high resolution Open
We present here a strategy to obtain a realistic hydrological simulation over France with the ORCHIDEE land surface model. The model is forced by the Safran atmospheric reanalysis at 8-km resolution and hourly time steps from 1959 to 2020,…
View article: Exploring the impacts of climate change on French hydropower generation
Exploring the impacts of climate change on French hydropower generation Open
Hydropower can play a crucial role in decarbonizing national power mixes, in particular in managing the variability of other renewable energy sources. However, climate change is expected to affect the water resources and could impact hydro…
View article: Identifying and quantifying the impact of climatic and non-climatic drivers on river discharge in Europe
Identifying and quantifying the impact of climatic and non-climatic drivers on river discharge in Europe Open
Our water resources have changed over the last century through a combination of water management evolutions and climate change. Understanding and decomposing these drivers of discharge changes is essential to preparing and planning adaptiv…
View article: Modeling hydropower operations at the scale of a power grid: a demand-based approach
Modeling hydropower operations at the scale of a power grid: a demand-based approach Open
Climate change and evolving water management practices may have a profound impact on hydropower generation. While hydrological models have been widely used to assess these effects, they often present some limitations. A major challenge lie…
View article: Introducing a new floodplain scheme in ORCHIDEE (version 7885): validation and evaluation over the Pantanal wetlands
Introducing a new floodplain scheme in ORCHIDEE (version 7885): validation and evaluation over the Pantanal wetlands Open
Adapting and improving the hydrological processes in land surface models are crucial given the increase in the resolution of the climate models to correctly represent the hydrological cycle. The present paper introduces a floodplain scheme…
View article: Budyko Framework Based Analysis of the Effect of Climate Change on Watershed Evaporation Efficiency and Its Impact on Discharge Over Europe
Budyko Framework Based Analysis of the Effect of Climate Change on Watershed Evaporation Efficiency and Its Impact on Discharge Over Europe Open
In the context of climate change, the stakes surrounding water availability are rapidly intensifying. Decomposing and quantifying the effects of climate on discharge allows us to understand their impact on water resources better. We propos…
View article: Changes in the surface and atmospheric water budget due to projected Amazon deforestation: Lessons from a fully coupled model simulation
Changes in the surface and atmospheric water budget due to projected Amazon deforestation: Lessons from a fully coupled model simulation Open
International audience
View article: Output of the Land Surface Model ORCHIDEE over river catchments in Europe, run with GSWP3 and synthetic forcings where the precipitation is modified
Output of the Land Surface Model ORCHIDEE over river catchments in Europe, run with GSWP3 and synthetic forcings where the precipitation is modified Open
# Description of the data file This dataset contains the main outputs used for the results of the article: "Budyko framework based analysis of the effect of climate change on watershed evaporation efficiency and its impact on discharge ove…
View article: Output of the Land Surface Model ORCHIDEE over river catchments in Europe, run with GSWP3 and synthetic forcings where the precipitation is modified
Output of the Land Surface Model ORCHIDEE over river catchments in Europe, run with GSWP3 and synthetic forcings where the precipitation is modified Open
# Description of the data file This dataset contains the main outputs used for the results of the article: "Budyko framework based analysis of the effect of climate change on watershed evaporation efficiency and its impact on discharge ove…
View article: Comment on egusphere-2023-549
Comment on egusphere-2023-549 Open
Abstract. Adapting and improving the hydrological processes in Land Surface Models is crucial given the increase of the resolution of the Climate Models to correctly represent the hydrological cycle. The present paper introduces a floodpla…
View article: Introducing a new floodplain scheme in ORCHIDEE (version 7885): validation and evaluation over the Pantanal wetlands
Introducing a new floodplain scheme in ORCHIDEE (version 7885): validation and evaluation over the Pantanal wetlands Open
Adapting and improving the hydrological processes in Land Surface Models is crucial given the increase of the resolution of the Climate Models to correctly represent the hydrological cycle. The present paper introduces a floodplains scheme…
View article: Hydrological modelling on atmospheric grids: using graphs of sub-grid elements to transport energy and water
Hydrological modelling on atmospheric grids: using graphs of sub-grid elements to transport energy and water Open
Land surface models (LSMs) use the atmospheric grid as their basic spatial decomposition because their main objective is to provide the lower boundary conditions to the atmosphere. Lateral water flows at the surface on the other hand requi…
View article: Experiment for the validation and evaluation of the floodplains scheme in ORCHIDEE
Experiment for the validation and evaluation of the floodplains scheme in ORCHIDEE Open
This file aims to complement the article called "Introducing a new floodplain scheme in ORCHIDEE: validation and evaluation over the Pantanal wetlands" from Anthony Schrapffer, Jan Polcher, Anna Sörensson and Lluís Fita. It contains the ne…
View article: Evaluation of a high-resolution high-performance routing scheme for regional to global scale applications within Earth System Models
Evaluation of a high-resolution high-performance routing scheme for regional to global scale applications within Earth System Models Open
River routing is a critical component of land surface models (LSMs), as it plays a significant role in the closure of the water balance at global scale, linking the estimation of river discharge to the one of sea level. The estimation of r…