Juha‐Pekka Tuovinen
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View article: Are natural mires warming or cooling Earth’s climate? - A perspective by the new ACME metric
Are natural mires warming or cooling Earth’s climate? - A perspective by the new ACME metric Open
Introduction Mire ecosystems, i.e. peat forming wetlands, have sequestered carbon dioxide (CO 2 ) from the atmosphere for millenia accumulating its carbon (C) into thick peat deposits. This has created a negative perturbation to the atmosp…
View article: A practical metric for estimating the current climate forcing of natural mires
A practical metric for estimating the current climate forcing of natural mires Open
Commensuration of the radiative effects of different greenhouse gases (GHGs) is crucial for understanding the effects of land cover and ecosystem changes on the global climate. However, none of the current commensuration approaches are sui…
View article: A practical metric for estimating the current climate forcing of natural mires
A practical metric for estimating the current climate forcing of natural mires Open
Commensuration of the radiative effects of different greenhouse gases (GHGs) is crucial for understanding the effects of land cover and ecosystem changes on the global climate. However, none of the current commensuration approaches are sui…
View article: Ozone concentration variations observed in northern Finland in relation to photochemical, transport and cloud processes
Ozone concentration variations observed in northern Finland in relation to photochemical, transport and cloud processes Open
View article: Carbon dioxide exchange above a 30-year-old Scots pine plantation established on organic-soil cropland
Carbon dioxide exchange above a 30-year-old Scots pine plantation established on organic-soil cropland Open
In the boreal zone, large areas of natural mires have been drained and used for agriculture, resulting in net carbon dioxide (CO 2 ) emissions and increased nitrous oxide emissions but decreased methane emissions. However, due to structura…
View article: Carbon dioxide and energy fluxes over a northern boreal lake
Carbon dioxide and energy fluxes over a northern boreal lake Open
We present a data set covering three months of carbon dioxide (CO2) and energy fluxes measured by the eddy covariance method over a northern boreal lake that collects waters from a surrounding catchment dominated by upland forest and wetla…
View article: Trends and scenarios of ground-level ozone concentrations in Finland
Trends and scenarios of ground-level ozone concentrations in Finland Open
This paper presents an overview of the changes in ground-level ozone and vegetation exposure occurring in Finland, both as observed in the recent decade, and as estimated for the period 1900 to 2100. A trend analysis of ozone and total nit…
View article: Carbon dioxide and energy flux measurements in four northern-boreal ecosystems at Pallas
Carbon dioxide and energy flux measurements in four northern-boreal ecosystems at Pallas Open
View article: Carbon dioxide exchange on a northern boreal fen
Carbon dioxide exchange on a northern boreal fen Open
Long-term net ecosystem CO{sub 2} exchange measurements were conducted on a nutrient-rich fen in northern Finland using the eddy covariance method. During the three measurement years (2006-2008), the mean daytime CO{sub 2} flux in July was…
View article: Trends in the bulk deposition and atmospheric concentration of air pollutants in the Finnish Integrated Monitoring catchment Pallas during 1992–2012
Trends in the bulk deposition and atmospheric concentration of air pollutants in the Finnish Integrated Monitoring catchment Pallas during 1992–2012 Open
View article: Preface to the special issue on integrated research of atmosphere, ecosystems and environment at Pallas
Preface to the special issue on integrated research of atmosphere, ecosystems and environment at Pallas Open
View article: Radiation measurements at the Pallas-Sodankylä Global Atmosphere Watch station — diurnal and seasonal cycles of ultraviolet, global and photosynthetically-active radiation
Radiation measurements at the Pallas-Sodankylä Global Atmosphere Watch station — diurnal and seasonal cycles of ultraviolet, global and photosynthetically-active radiation Open
We present time series of solar ultraviolet radiation (UVR), global radiation, and photosynthetically-active radiation (PAR) measurements from the Pallas-Sodankyla Global Atmosphere Watch (GAW) station at Sodankyla for the period 1990–2013…
View article: Interannual and seasonal variability of the air–sea CO <sub>2</sub> exchange at Utö in the coastal region of the Baltic Sea
Interannual and seasonal variability of the air–sea CO <sub>2</sub> exchange at Utö in the coastal region of the Baltic Sea Open
Oceans alleviate the accumulation of atmospheric CO2 by absorbing approximately a quarter of all anthropogenic emissions. In the deep oceans, carbon uptake is dominated by aquatic phase chemistry, whereas in biologically active coastal sea…
View article: Impact of weather and management practices on greenhouse gas flux dynamics on an agricultural grassland in Southern Finland
Impact of weather and management practices on greenhouse gas flux dynamics on an agricultural grassland in Southern Finland Open
Agricultural management and meteorological conditions have a great impact on grassland dynamics, and regenerative and holistic practices especially have significant potential for enhancing soil quality and fertility, biodiversity and carbo…
View article: Comment on egusphere-2024-628
Comment on egusphere-2024-628 Open
Abstract. Oceans alleviate the accumulation of atmospheric CO2 by absorbing approximately a quarter of all anthropogenic emissions. In the deep oceans, carbon uptake is dominated by aquatic phase chemistry, wher…
View article: Interannual and seasonal variability of the air-sea CO <sub>2</sub> exchange at Utö in the coastal region of the Baltic Sea
Interannual and seasonal variability of the air-sea CO <sub>2</sub> exchange at Utö in the coastal region of the Baltic Sea Open
Oceans alleviate the accumulation of atmospheric CO2 by absorbing approximately a quarter of all anthropogenic emissions. In the deep oceans, carbon uptake is dominated by aquatic phase chemistry, whereas in biologically active coastal sea…
View article: Peatland carbon dynamics in a changing climate: A 13-year flux time series of a fen in Northern Finland&#160;
Peatland carbon dynamics in a changing climate: A 13-year flux time series of a fen in Northern Finland  Open
Northern peatlands act as a global carbon sink. At the same time, they are a major source of methane. Rising temperatures due to global warming may severely change carbon dynamics. However, long-term studies to evaluate the impact of globa…
View article: Improved Uncertainty Estimates for Eddy Covariance-Based Carbon Dioxide Balances Using Deep Ensembles
Improved Uncertainty Estimates for Eddy Covariance-Based Carbon Dioxide Balances Using Deep Ensembles Open
View article: Peatlands have the potential to emerge as significant contributors to future climate warming
Peatlands have the potential to emerge as significant contributors to future climate warming Open
Peatlands are huge reservoirs of carbon in the terrestrial ecosystem. They are both long-term sinks of organic carbon and a major natural source of atmospheric methane. These carbon-rich ecosystems are at risk of losing their carbon sink c…
View article: Monitoring of carbon-water fluxes at Eurasian meteorological stations using random forest and remote sensing
Monitoring of carbon-water fluxes at Eurasian meteorological stations using random forest and remote sensing Open
View article: Two contrasting years of continuous N<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si160.svg" display="inline" id="d1e601"><mml:msub><mml:mrow/><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:math>O and CO<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si160.svg" display="inline" id="d1e609"><mml:msub><mml:mrow/><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:math> fluxes on a shallow-peated drained agricultural boreal peatland
Two contrasting years of continuous NO and CO fluxes on a shallow-peated drained agricultural boreal peatland Open
Drained agricultural boreal peatlands comprise a large source of nitrous oxide (N2O) and carbon dioxide (CO2) but a small sink or source of methane (CH4). N2O fluxes have high spatial and temporal variability and are often measured with th…
View article: Spatiotemporal lagging of predictors improves machine learning estimates of atmosphere–forest CO <sub>2</sub> exchange
Spatiotemporal lagging of predictors improves machine learning estimates of atmosphere–forest CO <sub>2</sub> exchange Open
Accurate estimates of net ecosystem CO2 exchange (NEE) would improve the understanding of natural carbon sources and sinks and their role in the regulation of global atmospheric carbon. In this work, we use and compare the random forest (R…
View article: A comparison of methods for gap-filling sensible and latent heat fluxes in different climatic conditions
A comparison of methods for gap-filling sensible and latent heat fluxes in different climatic conditions Open
Eddy covariance flux measurements need to be gap-filled when utilising the data for the calculation of annual balances. The measurement technique itself is prone to errors and technical failures may also lead to gaps of various lengths. Ga…
View article: A new gap-filling method to avoid systematic bias in carbon balance estimates in northern ecosystems
A new gap-filling method to avoid systematic bias in carbon balance estimates in northern ecosystems Open
Climate change mitigation requires – besides greenhouse gas emission reductions – actions to increase carbon sinks and storages in terrestrial ecosystems. However, quantification of sources and sinks of carbon depends on reliab…
View article: Impact of weather and management practices on GHG dynamics on an agricultural grassland in southern Finland
Impact of weather and management practices on GHG dynamics on an agricultural grassland in southern Finland Open
Agricultural management has recently drawn substantial attention as regenerative practices are showing their potential in enhancing soil quality and fertility, biodiversity, and carbon uptake from the atmosphere into the soil. In Nordic co…
View article: Peatland methane emissions in a changing climate: A 13-year time series of a boreal fen in Northern Finland
Peatland methane emissions in a changing climate: A 13-year time series of a boreal fen in Northern Finland Open
Boreal peatlands are a major source of global wetland methane emissions. With ongoing climate change, these emissions could rise sharply in future, further enhancing climate change. Yet, long-term studies evaluating the impact of climate c…
View article: Partial cutting of a boreal nutrient-rich peatland forest causes radically less short-term on-site CO2 emissions than clear-cutting
Partial cutting of a boreal nutrient-rich peatland forest causes radically less short-term on-site CO2 emissions than clear-cutting Open
Wide-spread harvesting of forests growing on drained peatlands is foreseen to take place in Finland in the near future. A hot question is if continuous cover forestry utilizing partial cuttings could be used to mitigate carbon dioxide (CO2…
View article: Meteorological responses of carbon dioxide and methane fluxes in the terrestrial and aquatic ecosystems of a subarctic landscape
Meteorological responses of carbon dioxide and methane fluxes in the terrestrial and aquatic ecosystems of a subarctic landscape Open
The subarctic landscape consists of a mosaic of forest, peatland, and aquatic ecosystems and their ecotones. The carbon (C) exchange between ecosystems and the atmosphere through carbon dioxide (CO2) and methane (CH4) fluxes varies spatial…
View article: A widely-used eddy covariance gap-filling method creates systematic bias in carbon balance estimates
A widely-used eddy covariance gap-filling method creates systematic bias in carbon balance estimates Open
Climate change mitigation requires, besides reductions in greenhouse gas emissions, actions to increase carbon sinks in terrestrial ecosystems. A key measurement method for quantifying such sinks and calibrating models is the eddy covarian…
View article: The effect of rainfall amount and timing on annual transpiration in a grazed savanna grassland
The effect of rainfall amount and timing on annual transpiration in a grazed savanna grassland Open
The role of precipitation (P) variability with respect to evapotranspiration (ET) and its two components, transpiration (T) and evaporation (E), from savannas continues to draw significant research interest given its relevance to a number …