A5025638517- Plant Water Relations and Carbon Dynamics
- Climate variability and models
- Hydrology and Watershed Management Studies
- Peatlands and Wetlands Ecology
- Atmospheric and Environmental Gas Dynamics
- Land Use and Ecosystem Services
- Plant Ecology and Soil Science
- Meteorological Phenomena and Simulations
- Species Distribution and Climate Change
- Water resources management and optimization
- Remote Sensing in Agriculture
- Hydrology and Drought Analysis
- Forest ecology and management
- Remote Sensing and LiDAR Applications
- Cryospheric studies and observations
- Hydrological Forecasting Using AI
- Environmental Impact and Sustainability
- Risk Perception and Management
- Odor and Emission Control Technologies
- Tree-ring climate responses
- Forest Management and Policy
- Sustainability and Ecological Systems Analysis
- Soil Moisture and Remote Sensing
- 3D Modeling in Geospatial Applications
- Soil and Unsaturated Flow
Forschungszentrum Jülich
2021-2025
Sphere Institute
2024
Ernst Ruska Centre
2023
Abstract A reanalysis is a physically consistent set of optimally merged simulated model states and historical observational data, using data assimilation. High computational costs for modeled processes assimilation algorithms has led to Earth system specific products the atmosphere, ocean land separately. Recent developments include advanced uncertainty quantification generation biogeochemical ocean. Here, we review atmospheric oceanic reanalyzes, more in detail terrestrial reanalyzes. In...
Abstract Water-use efficiency is the amount of carbon assimilated per water used by an ecosystem and a key indicator functioning, but its variability in response to climate change droughts not thoroughly understood. Here, we investigated trends, drought drivers three water-use indices from 1995–2018 Europe with remote sensing data that considered long-term environmental effects. We show inherent decreased −4.2% Central Europe, exhibiting threatened functioning. In European grasslands it...
Abstract Despite previous reports on European growing seasons lengthening due to global warming, evidence shows that this trend has been reversing in the past decade increased transpiration needs. To asses this, we used an innovative method along with space-based observations determine timing of greening and dormancy then existing trends them causes. Early still occurs, albeit at slower rates than before. However, a recent (2011–2020) shift caused season length decrease back 1980s levels....
Abstract Both carbon dioxide uptake and albedo of the land surface affect global climate. However, climate change mitigation by increasing can cause a warming trade-off decreasing albedo, with most research focusing on afforestation its interaction snow. Here, we present observations from 176 globally distributed flux stations. We demonstrate gradual decline in maximum achievable annual as increases, even within subgroups non-forest snow-free ecosystems. Based paired-site permutation...
Addressing global change requires standardised observations across all ecosystem spheres. To that end, the distributed Integrated European Long-Term Ecosystem, critical zone and socio-ecological Research Infrastructure (eLTER RI) strives for an optimal observational design of its over 200 in-situ facilities. Their spatial distribution should be unbiased to scale local data continental target region. Therefore, we assessed biases in emerging eLTER RI facility network. We (i) conducted a...
Abstract. Evapotranspiration (ET) and gross primary production (GPP) are critical fluxes contributing to the energy, water, carbon exchanges between atmosphere land surface. Land surface models such as Community Model v5 (CLM5) quantify these fluxes, estimate state of budgets water resources, contribute a better understanding climate change's impact on ecosystems. Past studies have shown ability CLM5 model ET GPP magnitudes well but emphasized systematic underestimations lower variability...
Like those recently experienced in 2018 and 2022, European droughts significantly alter ecosystem processes, such as photosynthesis evapotranspiration. Quantifying these large-scale alterations understanding their drivers is essential to studying the drought impacts on performance, water resource management, carbon emission budgeting. However, this date, because of differing definitions events complex interactions among eco-hydrological variables across multiple time scales, research has...
Understanding long-term trends in Essential Climate Variables (ECVs) is important for predicting future climate impacts. This study investigates multiple land and variables, including evapotranspiration (ET), surface soil moisture (SM), snow cover (SC), water equivalent (SWE), total storage (TWS) streamflow along with variables influencing vegetation productivity, such as vapor pressure deficit (VPD), gross primary production (GPP) plant available water, to provide a comprehensive assessment...
Integrated long-term, in-situ observations are needed to document ongoing environmental change, "ground-truth" remote sensing and model outputs predict future Earth system behaviour. The scientific societal value of increases with site representativeness, temporal duration, number parameters measured comparability within across sites. Research Infrastructures (RIs) can support harmonised, cross-site data collection, curation publication. Integrating RI networks through co-location...
The link between soil water content (SWC) and evapotranspiration (ET) is of great importance in ecohydrology, agroecosystem management, land-atmosphere interaction earth-system analysis. There still a need to understand the key processes linking SWC ET different vegetated ecosystems, especially at larger scales. Therefore, this work, we used wavelet coherence analysis explore long-term relationship among predominant land use types (cropland, evergreen needleleaf forest, mixed open shrubland,...
Droughts have become more frequent and severe in Europe over the last decade - a trend expected to continue. Recent studies shown widespread responses of energy, water, carbon fluxes ecosystems single drought years from flux observations.  However, better understand how react droughts, we need gain explicit knowledge about different factors that influence their response. In this light, it is crucial associate droughts on diverse ecosystem types with particular compartments...
The Community Land Model version 5 (CLM5) integrates processes encompassing the water, energy, carbon, and nitrogen cycles, ecosystem dynamics, including managed ecosystems like agriculture. Nevertheless, intricacy of CLM5 introduces predictive uncertainties attributed to factors such as input data, process parameterizations, parameter values. This study conducts a comparative analysis between ensemble simulations eddy covariance in-situ measurements, focusing on effects uncertain model...
Land surface models (LSMs), when coupled with vegetation dynamic models, serve as useful tools to understand how ecosystem changes impact carbon and water cycling interact the climate. However, simplified parameterization schemes within LSMs makes it challenging capture full dynamics of processes, leading significant uncertainties in simulated variables. To assess these stemming from different model complexities representations, we conducted simulations employing schemes: (1) using static...
Climate change is expected to amplify the frequency and intensity of extreme events in future. Recently there was a series summers with heat waves droughts over central Europe from 2018 2022, but also severe flooding 2021. These had substantial effects on agriculture, water resources, human lives. To monitor assess impacts events, situ remote sensing data for soil moisture, evapotranspiration carbon fluxes are important. In this study we evaluate simulation results by Community Land Model...
Table S1: A list of ICOS stations, their land cover, coordinates, the coordinates corresponding grid cell 3 km European CORDEX used in our simulations, and number 8-daily data points available for analyses ET GPP.Note that stations do not belong to PFT ENF, DBF, GRA, CRO were omitted, some included sites did have with study period (1995 -2018), thus having a count 0 points.See Section 2.2.1.Stations, where cover was directly indicated metadata also left out analyses.ID country lat lon (cell)...
Abstract. Evapotranspiration (ET) and gross primary production (GPP) are critical fluxes contributing to the energy, water, carbon exchanges between atmosphere land surface. Land surface models such as Community Model v5 (CLM5) quantify these fluxes, contribute a better understanding of climate change's impact on ecosystems, estimate state budgets water resources. Past studies have shown ability CLM5 model ET GPP magnitudes well but emphasized systematic underestimations lower variability...
Changing environmental conditions impact ecosystem dynamics which have important implications for the land–atmosphere carbon and water exchanges. Land surface models coupled with dynamic vegetation can be used to understand of changes in terrestrial ecosystems on cycles their interactions climate. However, process-based are highly parameterized a large number uncertain parameters, lead uncertainties model outputs. Here, we use model, Functionally Assembled Terrestrial Simulator...
Understanding hydrological and biogeochemical ecosystem process variability in response to a changing climate is important improve land surface models assess current future states of functioning. However, the representation spatial heterogeneity processes state-of-the-art land-surface has not been evaluated thoroughly until today. Here we compare gross primary production (GPP) evapotranspiration (ET) simulated by Community Land Model version 5 (CLM5) for period 1995-2018 over Euro-CORDEX...
eLTER RI - the distributed Integrated European Long-Term Ecosystem, critical zone and socio-ecological Research Infrastructure – will comprise >200 in-situ facilities (ecosystem research sites platforms) once formalised as Consortium. Optimisation of spatial distribution infrastructure is often based on analyses transferability or representativity that reveal under-, well overrepresented conditions locations.In this study we assessed current coverage environmental gradients by RI. Therefore,...