Tuomas Laurila
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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: Finnish Centre of Excellence in Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change : summary and outlook
Finnish Centre of Excellence in Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change : summary and outlook Open
markku Kulmala1)*, hanna K. lappalainen1)2), Jaana Back1)3), ari laaksonen2)4), eero nikinmaa3), marja-liisa riekkola5), timo vesala1), Yrjo viisanen2), tuula aalto2), michael Boy1), miikka Dal maso6), mikael ehn1), hannele hakola2), Pertt…
View article: Methods for determining emission factors for the use of peat and peatlands — flux measurements and modelling
Methods for determining emission factors for the use of peat and peatlands — flux measurements and modelling Open
The purpose of this paper is to introduce the gas exchange measurement and flux calculation methods commonly used in the projects of the programme Greenhouse gas emissions from the use of peat and peatlands in Finland. The methods include …
View article: On measurements of aerosol particles and greenhouse gases in Siberia and future research needs
On measurements of aerosol particles and greenhouse gases in Siberia and future research needs Open
The role of the world's boreal forest for our understanding of the climate system is indisputable. Due to the large area covered, the forest's biophysical (e.g. surface energy balance, albedo) and biogeochemical (e.g. bidirectional exchang…
View article: Preface to the special issue on Monitoring and Modelling of Carbon-Balance-, Water- and Snow-Related Phenomena at Northern Latitudes
Preface to the special issue on Monitoring and Modelling of Carbon-Balance-, Water- and Snow-Related Phenomena at Northern Latitudes Open
tuula aalto1)*, mikko Peltoniemi2), mika aurela1), Kristin Bottcher3), Yao Gao1), sanna harkonen4), Pekka harma3), Juho Kilkki1), Pasi Kolari5), tuomas laurila1), aleksi lehtonen2), terhikki manninen1), tiina markkanen1), olli-Pekka mattil…
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: 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: Biogenic volatile organic compound (VOC) emissions from forests in Finland
Biogenic volatile organic compound (VOC) emissions from forests in Finland Open
We present model estimates of biogenic volatile organic compound (VOC) emissions from the forests in Finland. The emissions were calculated for the years 1995–1997 using the measured isoprene and monoterpene emission factors of boreal tree…
View article: Variation of the VOC emission rates of birch species during the growing season
Variation of the VOC emission rates of birch species during the growing season Open
The VOC emission rates of 16 Betula pubescens and 15 Betula pendula trees were measured during the 1997 growing season in southern Finland. Since the monoterpene emission rates of Betula pubescens showed large variations between the tree s…
View article: Emission factors and their uncertainty for the exchange of CO2, CH4 and N2O in Finnish managed peatlands
Emission factors and their uncertainty for the exchange of CO2, CH4 and N2O in Finnish managed peatlands Open
This paper summarises the results of several research groups participating in the research programme Greenhouse Impacts of the use of Peat and Peatlands in Finland, and presents emission factors for peat-atmosphere fluxes of CO 2 , CH 4 , …
View article: Overview of the atmospheric research activities and results at Pallas GAW station
Overview of the atmospheric research activities and results at Pallas GAW station Open
Finnish Meteorological Institute's air quality measuring station at Pallas, in northern Finland, has been part of the Global Atmosphere Watch programme of the World Meteorological Organization since 1994. Tropospheric air composition and m…
View article: Increasing Methane Emissions and Widespread Cold‐Season Release From High‐Arctic Regions Detected Through Atmospheric Measurements
Increasing Methane Emissions and Widespread Cold‐Season Release From High‐Arctic Regions Detected Through Atmospheric Measurements Open
Rising Arctic temperatures pose a threat to the large carbon stores trapped in Arctic permafrost. To assess methane emissions in high‐Arctic regions, we analyzed atmospheric data from Alaska and Siberia using two methods: (a) a wind sector…
View article: Peatland carbon dynamics in a changing climate: A 13-year flux time series of a fen in Northern Finland 
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: Identification of spikes in continuous ground-based in situ time series of CO <sub>2</sub> , CH <sub>4</sub> and CO: an extended experiment within the European ICOS Atmosphere network
Identification of spikes in continuous ground-based in situ time series of CO <sub>2</sub> , CH <sub>4</sub> and CO: an extended experiment within the European ICOS Atmosphere network Open
The identification of spikes (i.e., short and high variability in the measured signals due to very local emissions occurring in the proximity of a measurement site) is of interest when using continuous measurements of atmospheric greenhous…
View article: Comment on amt-2023-130
Comment on amt-2023-130 Open
Abstract. The identification of spikes (i.e. short and high variability in the measured signals due to very local emissions occurring in the proximity of a measurement site) is of interest when using continuous measurements of atmospheric …
View article: Identification of spikes in continuous ground-based in-situ time series of CO <sub>2</sub> , CH <sub>4</sub> and CO: an extended experiment within the European ICOS-Atmosphere Network
Identification of spikes in continuous ground-based in-situ time series of CO <sub>2</sub> , CH <sub>4</sub> and CO: an extended experiment within the European ICOS-Atmosphere Network Open
The identification of spikes (i.e. short and high variability in the measured signals due to very local emissions occurring in the proximity of a measurement site) is of interest when using continuous measurements of atmospheric greenhouse…
View article: Carbon balance of an afforested wasteland: A case study to quantify emission offset units
Carbon balance of an afforested wasteland: A case study to quantify emission offset units Open
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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: Environmental impacts and mitigation options on cultivated peatland with shallow peat depth in northern Finland – NorPeat platform
Environmental impacts and mitigation options on cultivated peatland with shallow peat depth in northern Finland – NorPeat platform Open
To use peatlands for agriculture or forestry, they need to be drained. Lowered water table and increased oxygen concentration in the soil profile alter soil biogeochemistry, enhancing peat decomposition and mineralization processes. After …
View article: Increasing methane emissions from the North Slope of Alaska since 2000 and late Autumn-Winter emissions from multiple Arctic regions
Increasing methane emissions from the North Slope of Alaska since 2000 and late Autumn-Winter emissions from multiple Arctic regions Open
Large stores of carbon frozen in the Arctic as permafrost are under threat of thawing as temperatures in the Arctic increase at a rate four times that of the global mean. This study uses recent atmospheric data from the North Slope of Alas…