Asko Noormets
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View article: The use of newly assimilated photosynthates by soil autotrophic and heterotrophic respiration on a diurnal scale
The use of newly assimilated photosynthates by soil autotrophic and heterotrophic respiration on a diurnal scale Open
The regulatory role of plant carbohydrate status and root exudation on soil CO2 efflux has been demonstrated, yet the underlying mechanisms, particularly through root respiration, remain largely theoretical. In this study, we analyzed the …
View article: Impacts of Harvesting and Prescribed Burning on Forest Soil Carbon Dynamics: A Global Meta-Analysis
Impacts of Harvesting and Prescribed Burning on Forest Soil Carbon Dynamics: A Global Meta-Analysis Open
Forest management practices such as clearcutting, thinning, and prescribed burning are widely implemented to achieve various ecological and silvicultural objectives, yet their effects on soil carbon dynamics and belowground processes remai…
View article: Tree mortality provides early warning sign of ecosystem functional transition in coastal freshwater forested wetlands
Tree mortality provides early warning sign of ecosystem functional transition in coastal freshwater forested wetlands Open
Globally, coastal forested wetlands are increasingly affected by relative sea level rise. However, the mechanisms underlying coastal wetland degradation remain unclear. Using the eddy covariance approach, we evaluated the long-term (i.e. 2…
View article: The Use of Newly Assimilated Photosynthates by Soil Autotrophic and Heterotrophic Respiration on a Diurnal Scale
The Use of Newly Assimilated Photosynthates by Soil Autotrophic and Heterotrophic Respiration on a Diurnal Scale Open
The regulatory role of plant carbohydrate status and root exudation on soil CO2 efflux has been demonstrated, yet the underlying mechanisms, particularly through root respiration, remain largely theoretical. In this study, we analyzed the …
View article: Network of networks: Time series clustering of AmeriFlux sites
Network of networks: Time series clustering of AmeriFlux sites Open
Environmental observation networks, such as AmeriFlux, are foundational for monitoring ecosystem response to climate change, management practices, and natural disturbances; however, their effectiveness depends on their representativeness f…
View article: The effect of the frequency of prescribed burning on annual soil carbon balance in a loblolly-shortleaf pine forest in East Texas
The effect of the frequency of prescribed burning on annual soil carbon balance in a loblolly-shortleaf pine forest in East Texas Open
Prescribed burning is a common forest management tool, and is expected to affect soil carbon (C) content and dynamics, yet data on this remain limited. Here we report the effect of prescribed burning frequency on net soil C balance in thre…
View article: Seasonal warming responses of the carbon dioxide sink from northern forests are sensitive to stand age
Seasonal warming responses of the carbon dioxide sink from northern forests are sensitive to stand age Open
Northern forests (forests north of 30°N) are major terrestrial carbon dioxide (CO2) sinks, while rapid warming can disturb their CO2 sink function. Here we use multi-year net CO2 exchange observations from 65 northern forest sites to show …
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: Seasonal warming responses of the ecosystem CO2 sink of northern forests are sensitive to stand age
Seasonal warming responses of the ecosystem CO2 sink of northern forests are sensitive to stand age Open
Northern forests (forests north of 30°N) are major terrestrial CO2 sinks, while rapid warming in these regions can disturb their CO2 sink function. The age-dependent nature of the CO2 sink in forests has been widely reported, but the impac…
View article: Asynchrony of the seasonal dynamics of gross primary production and ecosystem respiration
Asynchrony of the seasonal dynamics of gross primary production and ecosystem respiration Open
The phenological cycles of terrestrial ecosystems have shifted with the changing climate, and the altered timings of biogeochemical fluxes may also exert feedback on the climate system. As regulators of land carbon balance, relative shifts…
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: Upscaling Wetland Methane Emissions From the FLUXNET‐CH4 Eddy Covariance Network (UpCH4 v1.0): Model Development, Network Assessment, and Budget Comparison
Upscaling Wetland Methane Emissions From the FLUXNET‐CH4 Eddy Covariance Network (UpCH4 v1.0): Model Development, Network Assessment, and Budget Comparison Open
Wetlands are responsible for 20%–31% of global methane (CH 4 ) emissions and account for a large source of uncertainty in the global CH 4 budget. Data‐driven upscaling of CH 4 fluxes from eddy covariance measurements can provide new and in…
View article: Evaluating and bridging the flux-variance and surface renewal methods
Evaluating and bridging the flux-variance and surface renewal methods Open
Two micrometeorological methods that utilize high frequency sampling of air temperature were tested against eddy covariance (EC) sensible heat flux (H) measurements at three sites representing agricultural, agro-forestry and forestry syste…
View article: AmeriFlux FLUXNET-1F US-NC3 NC_Clearcut#3
AmeriFlux FLUXNET-1F US-NC3 NC_Clearcut#3 Open
This is the AmeriFlux Management Project (AMP) created FLUXNET-1F version of the carbon flux data for the site US-NC3 NC_Clearcut#3. This is the FLUXNET version of the carbon flux data for the site US-NC3 NC_Clearcut#3 produced by applying…
View article: AmeriFlux US-CRK Davy Crockett National Forest
AmeriFlux US-CRK Davy Crockett National Forest Open
This is the AmeriFlux version of the carbon flux data for the site US-CRK Davy Crockett National Forest. Site Description - Shortleaf pine, mature
View article: AmeriFlux FLUXNET-1F US-Oho Oak Openings
AmeriFlux FLUXNET-1F US-Oho Oak Openings Open
This is the AmeriFlux Management Project (AMP) created FLUXNET-1F version of the carbon flux data for the site US-Oho Oak Openings. This is the FLUXNET version of the carbon flux data for the site US-Oho Oak Openings produced by applying t…
View article: Environmental and Plant-Derived Controls on the Seasonality and Partitioning of Soil Respiration in an American Sycamore (Platanus occidentalis) Bioenergy Plantation Grown at Different Planting Densities
Environmental and Plant-Derived Controls on the Seasonality and Partitioning of Soil Respiration in an American Sycamore (Platanus occidentalis) Bioenergy Plantation Grown at Different Planting Densities Open
Bioenergy is one of the most considered alternatives to fossil fuels. Short-rotation woody crops (SRWCs) as bioenergy sources are capable of alleviating energy constraints and sequestering atmospheric CO2. However, studies investigating so…
View article: The Unabated Atmospheric Carbon Losses in a Drowning Wetland Forest of North Carolina: A Point of No Return?
The Unabated Atmospheric Carbon Losses in a Drowning Wetland Forest of North Carolina: A Point of No Return? Open
Coastal wetlands provide the unique biogeochemical functions of storing a large fraction of the terrestrial carbon (C) pool and being among the most productive ecosystems in the world. However, coastal wetlands face numerous natural and an…
View article: Beyond carbon flux partitioning: Carbon allocation and nonstructural carbon dynamics inferred from continuous fluxes
Beyond carbon flux partitioning: Carbon allocation and nonstructural carbon dynamics inferred from continuous fluxes Open
Carbon (C) allocation and nonstructural carbon (NSC) dynamics play essential roles in plant growth and survival under stress and disturbance. However, quantitative understanding of these processes remains limited. Here we propose a framewo…
View article: AmeriFlux FLUXNET-1F US-NC4 NC_AlligatorRiver
AmeriFlux FLUXNET-1F US-NC4 NC_AlligatorRiver Open
This is the AmeriFlux Management Project (AMP) created FLUXNET-1F version of the carbon flux data for the site US-NC4 NC_AlligatorRiver. This is the FLUXNET version of the carbon flux data for the site US-NC4 NC_AlligatorRiver produced by …
View article: AmeriFlux FLUXNET-1F US-NC1 NC_Clearcut
AmeriFlux FLUXNET-1F US-NC1 NC_Clearcut Open
This is the AmeriFlux Management Project (AMP) created FLUXNET-1F version of the carbon flux data for the site US-NC1 NC_Clearcut. This is the FLUXNET version of the carbon flux data for the site US-NC1 NC_Clearcut produced by applying the…