Kim Pilegaard
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View article: Satellite-derived Ecosystem Functional Types capture ecosystem functional heterogeneity at regional scale
Satellite-derived Ecosystem Functional Types capture ecosystem functional heterogeneity at regional scale Open
Assessing ecosystem functioning is crucial for managing and conserving ecosystems and their services. Numerous ways to evaluate ecosystem functioning have been developed, using species traits, such as Plant Functional Types (PFTs), flux me…
View article: Comparison of tree stem diameter variations in beech (Fagus sylvatica L.) in Sorø Denmark and in Scots pine (Pinus sylvestris L.) in Hyytiälä, Finland
Comparison of tree stem diameter variations in beech (Fagus sylvatica L.) in Sorø Denmark and in Scots pine (Pinus sylvestris L.) in Hyytiälä, Finland Open
Tree stem diameter variations were measured simultaneously in beech (Fagus sylvatica L.) in Sorø, Denmark and in Scots pine (Pinus sylvestris L.) in Hyytiälä, Finland. The variations were detected at two heights on the xylem and the whole …
View article: Field measurements of atmosphere–biosphere interactions in a Danish beech forest
Field measurements of atmosphere–biosphere interactions in a Danish beech forest Open
A field station was established in a beech forest near Sorø, Denmark in the spring of 1996 to provide a platform for studies of atmosphere–biosphere interactions. The station is equipped with a 57-m mast and a 24-m scaffolding tower. The m…
View article: Phenology Across Scales: An Intercontinental Analysis of Leaf‐Out Dates in Temperate Deciduous Tree Communities
Phenology Across Scales: An Intercontinental Analysis of Leaf‐Out Dates in Temperate Deciduous Tree Communities Open
Aim To quantify the intra‐community variability of leaf‐out (ICVLo) among dominant trees in temperate deciduous forests, assess its links with specific and phylogenetic diversity, identify its environmental drivers and deduce its ecologica…
View article: Phenology of Photosynthesis in Winter‐Dormant Temperate and Boreal Forests: Long‐Term Observations From Flux Towers and Quantitative Evaluation of Phenology Models
Phenology of Photosynthesis in Winter‐Dormant Temperate and Boreal Forests: Long‐Term Observations From Flux Towers and Quantitative Evaluation of Phenology Models Open
We examined the seasonality of photosynthesis in 46 evergreen needleleaf (evergreen needleleaf forests (ENF)) and deciduous broadleaf (deciduous broadleaf forests (DBF)) forests across North America and Eurasia. We quantified the onset and…
View article: Earlier spring greening in Northern Hemisphere terrestrial biomes enhanced net ecosystem productivity in summer
Earlier spring greening in Northern Hemisphere terrestrial biomes enhanced net ecosystem productivity in summer Open
The northern terrestrial biomes are being remarkably altered by climate change. Higher springtime temperature induces the earlier greening of vegetation, which may further influence ecosystem functions during the subsequent season. However…
View article: Standards and Open Access are the ICOS Pillars: Reply to “Comments on ‘The Integrated Carbon Observation System in Europe’”
Standards and Open Access are the ICOS Pillars: Reply to “Comments on ‘The Integrated Carbon Observation System in Europe’” Open
In his comment (Kowalski 2023) on our recent publication (Heiskanen et al. 2022) where we present the Integrated Carbon Observation System (ICOS) research infrastructure, Andrew Kowalski introduces three important and, in our opinion, diff…
View article: Phenology across scales: an intercontinental analysis of leaf-out dates in temperate deciduous tree communities
Phenology across scales: an intercontinental analysis of leaf-out dates in temperate deciduous tree communities Open
Aim To quantify the intra-community variability of leaf-out (ICVLo) among dominant trees in temperate deciduous forests, assess its links with specific and phylogenetic diversity, identify its environmental drivers, and deduce its ecologic…
View article: Standards and Open Access are the ICOS Pillars Reply to "Comments on 'The Integrated Carbon Observation System in Europe'"
Standards and Open Access are the ICOS Pillars Reply to "Comments on 'The Integrated Carbon Observation System in Europe'" Open
International audience
View article: Options to correct local turbulent flux measurements for large-scale fluxes using an approach based on large-eddy simulation
Options to correct local turbulent flux measurements for large-scale fluxes using an approach based on large-eddy simulation Open
The eddy-covariance method provides the most direct estimates for fluxes between ecosystems and the atmosphere. However, dispersive fluxes can occur in the presence of secondary circulations, which can inherently not be captured by such si…
View article: The Integrated Carbon Observation System in Europe
The Integrated Carbon Observation System in Europe Open
Since 1750, land-use change and fossil fuel combustion has led to a 46% increase in the atmospheric carbon dioxide (CO 2 ) concentrations, causing global warming with substantial societal consequences. The Paris Agreement aims to limit glo…
View article: Options to correct local turbulent flux measurements for large-scale fluxes using a LES-based approach
Options to correct local turbulent flux measurements for large-scale fluxes using a LES-based approach Open
The eddy-covariance method provides the most direct estimates for fluxes between ecosystems and the atmosphere. However, dispersive fluxes can occur in the presence of secondary circulations, which can inherently not be captured by such si…
View article: Correction to ‘Effects of drought and meteorological forcing on carbon and water fluxes in Nordic forests during the dry summer of 2018’
Correction to ‘Effects of drought and meteorological forcing on carbon and water fluxes in Nordic forests during the dry summer of 2018’ Open
The originally published version of this paper incorrectly spelt the author Kaido Soosaar's name as Kaido Soosar. This has been corrected on the publisher's website.
View article: Energy, water and carbon exchanges in managed forest ecosystems: description, sensitivity analysis and evaluation of the INRAE GO+ model, version 3.0
Energy, water and carbon exchanges in managed forest ecosystems: description, sensitivity analysis and evaluation of the INRAE GO+ model, version 3.0 Open
The mechanistic model GO+ describes the functioning and growth of managed forests based upon biophysical and biogeochemical processes. The biophysical and biogeochemical processes included are modelled using standard formulations of radiat…
View article: Effects of drought and meteorological forcing on carbon and water fluxes in Nordic forests during the dry summer of 2018
Effects of drought and meteorological forcing on carbon and water fluxes in Nordic forests during the dry summer of 2018 Open
The Nordic region was subjected to severe drought in 2018 with a particularly long-lasting and large soil water deficit in Denmark, Southern Sweden and Estonia. Here, we analyse the impact of the drought on carbon and water fluxes in 11 fo…
View article: The PROFOUND Database for evaluating vegetation models and simulating climate impacts on European forests
The PROFOUND Database for evaluating vegetation models and simulating climate impacts on European forests Open
Process-based vegetation models are widely used to predict local and global ecosystem dynamics and climate change impacts. Due to their complexity, they require careful parameterization and evaluation to ensure that projections are accurat…
View article: Energy, water and carbon exchanges in managed forest ecosystems: description, sensitivity analysis and evaluation of the INRAE GO+ model, version 3.0
Energy, water and carbon exchanges in managed forest ecosystems: description, sensitivity analysis and evaluation of the INRAE GO+ model, version 3.0 Open
The mechanistic model GO+ describes the functioning and growth of managed forests based upon biophysical and biogeochemical processes. The biophysical and biogeochemical processes included are modelled using standard formulations of radiat…
View article: Supplementary material to "Energy, water and carbon exchanges in managed forest ecosystems: description, sensitivity analysis and evaluation of the INRAE GO+ model, version 3.0"
Supplementary material to "Energy, water and carbon exchanges in managed forest ecosystems: description, sensitivity analysis and evaluation of the INRAE GO+ model, version 3.0" Open
This supplementary material is including details of the equations and algorithms cited in the main article.It is organised in different sections corresponding to specific processes included in the GO+ model.Some additional illustrations of…
View article: Carbon–nitrogen interactions in European forests and semi-natural vegetation – Part 1: Fluxes and budgets of carbon, nitrogen and greenhouse gases from ecosystem monitoring and modelling
Carbon–nitrogen interactions in European forests and semi-natural vegetation – Part 1: Fluxes and budgets of carbon, nitrogen and greenhouse gases from ecosystem monitoring and modelling Open
The impact of atmospheric reactive nitrogen (Nr) deposition on carbon (C) sequestration in soils and biomass of unfertilized, natural, semi-natural and forest ecosystems has been much debated. Many previous results of this dC∕dN response w…
View article: Evaluating the effect of the 2018 drought on the NEE in the Sorø beech forest by means of trend analysis and mechanistic canopy modelling of GPP.
Evaluating the effect of the 2018 drought on the NEE in the Sorø beech forest by means of trend analysis and mechanistic canopy modelling of GPP. Open
<p>Denmark experienced a severe drought in 2018 lasting from the beginning of May to the end of August with very little rain during this period. The influence of drought on the net ecosystem CO<sub>2</sub> exchange (NEE) …
View article: Vegetation feedbacks during drought exacerbate ozone air pollution extremes in Europe
Vegetation feedbacks during drought exacerbate ozone air pollution extremes in Europe Open
<p>This study highlights a previously under-appreciated &#8220;climate penalty&#8221; feedback mechanism - namely, substantial reductions of ozone uptake by water stressed vegetation &#8211; as a missing piece to the puzz…
View article: Impact of coordinate rotation on eddy covariance fluxes at complex sites
Impact of coordinate rotation on eddy covariance fluxes at complex sites Open
The choice of coordinate system to calculate eddy covariance fluxes becomes particularly relevant at complex measurement sites. The traditional way is to perform double rotation (DR) of the coordinate system i.e., to calculate turbulent fl…
View article: Net carbon ecosystem exchange during 24 years in the Sorø Beech Forest – relations to phenology and climate
Net carbon ecosystem exchange during 24 years in the Sorø Beech Forest – relations to phenology and climate Open
The carbon sequestration of plants through photosynthesis is responsible for removal of a substantial amount of the man-made CO2 emissions to the atmosphere. In recent years this so-called land-sink has removed about 30% of the man-made em…
View article: The PROFOUND database for evaluating vegetation models and simulating climate impacts on forests
The PROFOUND database for evaluating vegetation models and simulating climate impacts on forests Open
Process-based vegetation models are widely used to predict local and global ecosystem dynamics and climate change impacts. Due to their complexity, they require careful parameterization and evaluation to ensure that projections are accurat…
View article: Carbon / nitrogen interactions in European forests and semi-natural vegetation. Part I: Fluxes and budgets of carbon, nitrogen and greenhouse gases from ecosystem monitoring and modelling
Carbon / nitrogen interactions in European forests and semi-natural vegetation. Part I: Fluxes and budgets of carbon, nitrogen and greenhouse gases from ecosystem monitoring and modelling Open
The impact of atmospheric reactive nitrogen (Nr) deposition on carbon (C) sequestration in soils and biomass of unfertilised, natural, semi-natural and forest ecosystems has been much debated. Many previous results of this dC / dN response…
View article: Combining a Quantum Cascade Laser Spectrometer with an Automated Closed-Chamber System for δ13C Measurements of Forest Soil, Tree Stem and Tree Root CO2 Fluxes
Combining a Quantum Cascade Laser Spectrometer with an Automated Closed-Chamber System for δ13C Measurements of Forest Soil, Tree Stem and Tree Root CO2 Fluxes Open
Recent advances in laser spectroscopy have allowed for real-time measurements of the 13C/12C isotopic ratio in CO2, thereby providing new ways to investigate carbon cycling in natural ecosystems. In this study, we combined an Aerodyne quan…