SMEAR Estonia
Publications
2024
Pulliainen J., Aurela M., Aalto T., Böttcher K., Cohen J., Derksen C., Heimann M., Helbig M., Kolari P., Kontu A., Krasnova A., Launiainen S., Lemmetyinen J., Lindqvist H., Lindroth A., Lohila A., Luojus K., Mammarella I., Markkanen T., Nevala E., Noe S., Peichl M., Pumpanen J., Rautiainen K., Salminen M., Sonnentag O., Takala M., Thum T., Vesala T. and Vestin P. 2024: Increase in gross primary production of boreal forests balanced out by increase in ecosystem respiration, Remote Sensing of Environment, 313, 114376.
Kuana L.A., Almeida A.S., Ferreira Mercuri E.G. and Noe, S. M. 2024: Regionalization of GR4J model parameters for river flow prediction in Paraná, Brazil, Hydrol. Earth Syst. Sci, 28, 3367–3390.
Chaves M.G.D., da Silva A.B., Ferreira Mercuri E.G. and Noe, S. M. 2024: Particulate matter forecast and prediction in Curitiba using machine learning, Front. Big Data, 7, 1412837.
Rodrigues L.T., Goeldner B.S.A., Ferreira Mercuri E.G. and Noe, S. M. 2024: Tradescantia response to air and soil pollution, stamen hair cells dataset and ANN color classification, Front. Big Data, 7, 1384240.
Mahura, Alexander; Baklanov, Alexander; Makkonen, Risto; Boy, Michael; Petäjä, Tuukka; Lappalainen, Hanna K.; Nuterman, Roman; Kerminen, Veli-Matti; Arnold, Stephen R.; Jochum, Markus; Shvidenko, Anatoly; Esau, Igor; Sofiev, Mikhail; Stohl, Andreas; Aalto, Tuula; Bai, Jianhui; Chen, Chuchu; Cheng, Yafang; Drofa, Oxana; Huang, Mei; Järvi, Leena; Kokkola, Harri; Kouznetsov, Rostislav; Li, Tingting; Malguzzi, Piero; Monks, Sarah; Poulsen, Mads Bruun; Noe, Steffen M.; Palamarchuk, Yuliia; Foreback, Benjamin; Clusius, Petri; Rasmussen, Till Andreas Soya; She, Jun; Sørensen, Jens Havskov; Spracklen, Dominick; Su, Hang; Tonttila, Juha; Wang, Siwen; Wang, Jiandong; Wolf-Grosse, Tobias; Yu, Yongqiang; Zhang, Qing; Zhang, Wei; Zhang, Wen; Zheng, Xunhua; Li, Siqi; Li, Yong; Zhou, Putian; Kulmala, Markku 2024: Towards seamless environmental prediction – development of Pan-Eurasian EXperiment (PEEX) modelling platform. Big Earth Data, 1–42.
Kouznetsov, R., Hänninen, R., Uppstu, A., Kadantsev, E., Fatahi, Y., Prank, M., Kouznetsov, D., Noe, S. M., Junninen, H., and Sofiev, M. 2024: A bottom-up emission estimate for the 2022 Nord Stream gas leak: derivation, simulations, and evaluation, Atmos. Chem. Phys., 24, 4675–4691.
Ludovic Mayer, Céline Degrendele, Petr Šenk, Jiři Kohoutek, Petra Přibylová, Petr Kukučka, Lisa Melymuk, Amandine Durand, Sylvain Ravier, Andres Alastuey, Alex R. Baker, Urs Baltensperger, Kathrin Baumann-Stanzer, Tobias Biermann, Pernilla Bohlin-Nizzetto, Darius Ceburnis, Sébastien Conil, Cédric Couret, Anna Degórska, Evangelia Diapouli, Sabine Eckhardt, Konstantinos Eleftheriadis, Grant L. Forster, Korbinian Freier, François Gheusi, Maria I. Gini, Heidi Hellén, Stephan Henne, Hartmut Herrmann, Adéla Holubová Šmejkalová, Urmas Hõrrak, Christoph Hüglin, Heikki Junninen, Adam Kristensson, Laurent Langrene, Janne Levula, Marie Lothon, Elke Ludewig, Ulla Makkonen, Jana Matejovičová, Nikolaos Mihalopoulos, Veronika Mináriková, Wolfgang Moche, Steffen M. Noe, Noemí Pérez, Tuukka Petäjä, Véronique Pont, Laurent Poulain, Etienne Quivet, Gabriela Ratz, Till Rehm, Stefan Reimann, Ivan Simmons, Jeroen E. Sonke, Mar Sorribas, Ronald Spoor, Daan P. J. Swart, Vasiliki Vasilatou, Henri Wortham, Margarita Yela, Pavlos Zarmpas, Claudia Zellweger Fäsi, Kjetil Tørseth, Paolo Laj, Jana Klánová, and Gerhard Lammel 2024: Widespread Pesticide Distribution in the European Atmosphere Questions their Degradability in Air. Environmental Science & Technology 58 (7): 3342-3352
2023
Rodrigues L.T., Ferreira Mercuri E.G. and Noe S.M. 2023: Air pollution monitoring with Tradescantia hybrid and optical sensors in Curitiba and Araucária, Brazil. Forestry Studies 78: 57-71
Ferreira Mercuri E.G., Tamm T., Noe S.M. 2023: Water and carbon balances in a hemi-boreal forest. Forestry Studies 78: 72-90
Ferreira Mercuri E.G., Bergami I., Noe S.M., Junninen H., Norbisrath U. 2023: Prediction of particulate matter concentration in urban environment using Random Forest. In: EnvSys '23: Proceedings of the 1st International Workshop on Advances in Environmental Sensing Systems for Smart Cities, 7-12
Kollo J., Metslaid S., Padari A., Hordo M., Kangur A., Noe S., 2023: Trends in thermal growing season length from years 1955–2020 — A case study in hemiboreal forest in Estonia. Boreal Env. Res. 28: 169-180.
Lampilahti A., Garmash O., Arshinov M., Davydov D., Belan B., Noe S., Vana M., Komsaare K., Junninen H., Bianchi F., Lampilahti J., Dada L., Kerminen V-M., Petäjä T., Kulmala M., Ezhova E. 2023: New particle formation in boreal forests of Siberia, Finland and Estonia. Boreal Env. Res. 28: 147-167.
Junttila S., Ardö J., Cai Z., Jin H., Kljun N., Klemedtsson L., Krasnova A., Lange H., Lindroth A., Mölder M., Noe S.M., Tagesson T., Vestin P., Weslien P., Eklundh L. 2023: Estimating local-scale forest GPP in Northern Europe using Sentinel-2: Model comparisons with LUE, APAR, the plant phenology index, and a light response function. Science of Remote Sensing, 7, 100075
2022
Leinonen, V., Kokkola, H., Yli-Juuti, T., Mielonen, T., Kühn, T., Nieminen, T., Heikkinen, S., Miinalainen, T., Bergman, T., Carslaw, K., Decesari, S., Fiebig, M., Hussein, T., Kivekäs, N., Krejci, R., Kulmala, M., Leskinen, A., Massling, A., Mihalopoulos, N., Mulcahy, J.P., Noe S.M., van Noije, T., O'Connor, F.M., O'Dowd, C., Olivie, D., Pernov, J.D., Petäjä, T., Seland, Ø., Schulz, M., Scott, C.E., Skov, H., Swietlicki, E., Tuch, T., Wiedensohler, A., Virtanen, A., Mikkonen, S. 2022: Comparison of particle number size distribution trends in ground measurements and climate models. Atmos. Chem. Phys., 22, 12873–12905
Ribeiro Machado, D., Ferreira Mercuri E.G., Noe S.M., 2022: Approximations of the extended Graetz problem to quantify particulate matter transport and deposition in tubes. Applied Mathematical Modelling, 112, 708-725
Pisek J., Diaz-Pines ., Matteucci ., Noe S.M., Rebmann C. 2022: On the leaf inclination angle distribution as a plant trait for the most abundant broadleaf tree species in Europe. Agricultural and Forest Meteorology, 323, 109030
Krasnova A., Mander Ü., Noe S.M., Uri V., Krasnov D. and Soosaar K. 2022: Hemiboreal forests’ CO2 fluxes response to the European 2018 heatwave. Agricultural and Forest Meteorology, 323, 109042
Noe S.M., Tabakova K., Mahura A., Lappalainen H.K., Kosmale M., Heilimo J., Salzano R., Santoro M., Salvatori R., Spolaor A., Cairns W., Barbante C., Pankratov F., Humbert A., Sonke J.E., Law K.S., Onishi T., Paris J.-D., Skov H., Massling A., Dommergue A., Arshinov M., Davydov D., Belan B. and Petäjä T. 2022: Arctic observations and Sustainable Development Goals - Contributions and examples from ERA-PLANET iCUPE data. Environmental Science & Policy, 132, 323-336.
Kuusk, A., Kuusk J. 2022: Spectral actinometry at SMEAR-Estonia. ArXiv, Preprint
2021
Kangur A., Nigul K., Padari A., Kiviste A., Laarmann D., Põldveer E., Mitt R., Jõgiste K., Stanturf J.A., Paluots T., Kängsepp V., Jürgenson H., Noe S.M., Sims A., Metslaid M. and Korjus H. 2021: Composition of live, dead and downed trees in Järvselja old-growth forest. Forestry Studies | Metsanduslikud Uurimused, 75, 15-40.
Noe S.M., Krasnova A., Krasnov D., Cordey H.P.E. and Kangur A. 2021: Facilitating long-term 3D sonic anemometer measurements in hemiboreal forest ecosystems. Forestry Studies | Metsanduslikud Uurimused, 75, 140-149.
Sokhi R.S., Singh, V., ... Hõrrak U., ... Kaasik, M., ... Noe S., ... and Zavala, M. 2021: A global observational analysis to understand changes in air quality during exceptionally low anthropogenic emission conditions. Environment International, 157, 106818.
Barreira L.M.F., Ylisirniö A., Pullinen I., Buchholz A., Li Z., Lipp H., Junninen H., Noe S.M., Krasnova A., Krasnov D., Kask, K., Talts E., Niinemets Ü., Ruiz-Jimenez J. and Schobesberger S. 2021: The importance of sesquiterpene oxidation products for secondary organic aerosol formation in a spring-time hemi-boreal forest. Atmos. Chem. Phys., 21, 11781–11800.
Nigul K., Padari A., Kiviste A., Noe S.M., Korjus H., Laarmann D., Frehlich L.E., Jõgiste K., Stanturf J.A., Paluots T., Põldveer E., Kängsepp V., Jürgenson, H., Metslaid M. and Kangur A. 2021: The Possibility of Using the Chapman-Richards ans Näslund Functions to Model Height-Diameter Relationships in Hemiboreal Old-Growth Forest in Estonia. Forests, 12, 184.
2020
Kulmala M., Ezhova E., Kalliokoski T., Noe S., Vesala T., Lohila A., Liski J., Makkonen R., Bäck J., Petäjä T., Kerminen V.-M. 2020: CarbonSink+ - Accounting for multiple climate feedbacks from forests. Boreal Env. Res. 25: 145-159.
Petäjä, T., Duplissy, E.-M., Tabakova, K., Schmale, J., Altstädter, B., Ancellet, G., Arshinov, M., Balin, Y., Baltensperger, U., Bange, J., Beamish, A., Belan, B., Berchet, A., Bossi, R., Cairns, W. R. L., Ebinghaus, R., El Haddad, I., Ferreira-Araujo, B., Franck, A., Huang, L., Hyvärinen, A., Humbert, A., Kalogridis, A.-C., Kontantinov, P., Lampert, A., MacLeod, M., Magand, O., Mahura, A., Marelle, L., Masloboev, V., Moisseev, D., Moschos, V., Neckel, N., Onishi, T., Osterwalder, S., Ovaska, A., Paasonen, P., Panchenko, M., Pankratov, F., Pernov, J. B., Platis, A., Popovicheva, O., Raut, J.-C., Riandet, A., Sachs, T., Salvatori, R., Salzano, R., Schröder, L., Schön, M., Shevchenko, V., Skov, H., Sonke, J. E., Spolaor, A., Stathopoulos, V., Strahlendorff, M., Thomas, J. L., Vitale, V., Vratolis, S., Barbante, C., Chabrillat, S., Dommergue, A., Eleftheriadis, K., Heilimö, J., Law, K. S., Massling, A., Noe, S. M., Paris, J.-D., Prévôt, A., Riipinen, I., Wehner, B., Xie, Z., and Lappalainen, H. K. 2020: Integrative and comprehensive Understanding on Polar Environments (iCUPE): the concept and initial results, Atmos. Chem. Phys. 20, 8551-8592.
Kitz F., Spielmann F.M., Hammerle A., Kolle O., Migliavacca M., Moreno M., Ibrom A., Krasnov D., Noe S.M., Wohlfahrt G. 2020: Soil COS exchange: a comparison of three European ecosystems. Global Biogeochemical Cycles, 34, e2019GB006202.
Timmusk S., Nevo E., Ayele F., Noe S.M. and Niinemets Ü. 2020: Fighting Fusarium Pathogens in the Era of Climate Change: A Conceptual Approach. Pathogens 9(6), 419.
Noe S.M., Niinemets Ü. 2020: Impact of gall-forming insects on global BVOC emissions and climate: A perspective. Frontiers in Forests and Global Change 3:9
2019
Krasnova A., Kukumägi M., Mander Ü., Torga R., Krasnov D., Noe S.M., Ostonen I., Püttsepp Ü., Killian H., Uri V., Lõhmus K., Sõber J., Soosaar K. 2019: Carbon exchange in a hemiboreal mixed forest in relation to tree species composition. Agric. For. Met., 275, 11-23.
Mäki M., Krasnov D., Hellén H., Noe S.M., Bäck J. 2019: Stand type affects fluxes of volatile organic compounds from the forest floor in hemiboreal and boreal climates. Plant and Soil, available online.
Xiao, J. , Li, X. , He, B. , Arain, M. A., Beringer, J. , Desai, A. R., Emmel, C. , Hollinger, D. Y., Krasnova, A. , Mammarella, I. , Noe, S. M., Serrano Ortiz, P. , Rey-Sanchez, C. , Rocha, A. V. and Varlagin, A., 2019: Solar induced chlorophyll fluorescence exhibits a universal relationship with gross primary productivity across a wide variety of biome. Glob Change Biol., 25, e4-e5.
2018
Ezhova, E., Ylivinkka, I., Kuusk, J., Komsaare, K., Vana, M., Krasnova, A., Noe, S., Arshinov, M., Belan, B., Park, S.-B., Lavric, J. V., Heimann, M., Petäjä, T., Vesala, T., Mammarella, I., Kolari, P., Bäck, J., Rannik, U., Kerminen, V.-M., and Kulmala, M. 2018: Direct effect of aerosols on solar radiation and gross primary production in boreal and hemiboreal forests, Atmos. Chem. Phys., 18, 17863-17881.
Nieminen, T., Kerminen, V.-M., Petäjä, T., Aalto, P.P., Arshinov, M., Asmi, E., Baltensperger, U., Beddows, D.C.S., Beukes, J.P., Collins, D., Ding, A., Harrison, R.M., Henzing, B., Hooda, R., Hu, M., Hõrrak, U., Kivekäs, N., Komsaare, K., Krejci, R., Kristensson, A., Laakso, L., Laaksonen, A., Leaitch, W.R., Lihvainen, H., Mihalopoulus, N., Németh, Z., Nie, W., O'Dowd, C., Salma, I., Sellegri, K., Svenningsson, B., Swietlicki, E., Tunved, P., Ulevicius, V., Vakkari, V., Vana, M., Wiedensohler, A., Wu, Z., Virtanen, A., Kulmala, M., 2018: Global analysis of continental boundary layer new particle formation based on long-term measurements. Atmos. Chem. Phys., 18, 14737-14756.
Hari P., Noe S., Dengel S., Elbers J., Gielen B., Grönholm T., Kerminen V.-M., Kruijt B., Kulmala L., Launiainen S., Lindroth A., Petäjä T., Schurgers G., Vanhatalo A., Vesala T., Kulmala M., Bäck J. 2018: Prediction of photosynthesis in Scots pine ecosystems across Europe by needle-level theory. Atmos. Chem. Phys., 18, https://doi.org/10.5194/acp-18-13321-2018.
Kuusk, J., Ansko, I., Bialek, A., Vendt, R., Fox, N. 2018: Implication of Illumination Beam Geometry on Stray Light and Bandpass Characteristics of Diode Array Spectrometer. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 11 (8), 2925-2932.
Li, X., Xiao, J., He, B., Arain, M., Beringer, J., Desai, A. R., Emmel, C., Hollinger, D. Y., Krasnova, A., Mammarella, I., Noe, S. M., Serrano Ortiz, P., Rey-Sanchez, C., Rocha, A. V. and Varlagin, A. 2018: Solar-induced chlorophyll fluorescence is strongly correlated with terrestrial photosynthesis for a wide variety of biomes: First global analysis based on OCO-2 and flux tower observations. Glob Change Biol., 24, 3990-400
Kuusk, J., Kuusk, A. 2018: Hyperspectral radiometer for automated measurement of global and diffuse sky irradiance. Journal of Quantitative Spectroscopy and Radiative Transfer, 204, 272-280.
Kuusk, A., Kuusk, J. 2018: Estimation of variable atmospheric parameters for the atmospheric correction of satellite images. International Journal of Remote Sensing, 39(2), 565-576.
2017
Hari, P., Kerminen, V.-M., Kulmala, L., Kulmala, M., Noe, S., Petäjä, T., Vanhatalo, A., and Bäck, 2017: J.: Annual cycle of Scots pine photosynthesis, Atmos. Chem. Phys., 17, 15045050.
Hari P., Noe S., Dengel S., Elbers J., Gielen B., Grönholm T., Kerminen V.-M., Kruijt B., Kulmala L., Launiainen S., Lindroth A., Petäjä T., Schurgers G., Vanhatalo A., Vesala T., Kulmala M., Bäck J. 2017: Prediction of photosynthesis in Scots pine ecosystems across Europe by needle-level theory. Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2017-533.
Hari P., Kerminen V.-M., Kulmala L., Kulmala M., Noe S., Petäjä T., Vanhatalo A., Bäck J. 2017: Annual cycle in scots pine's photosynthesis. Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2017-532.
2016
Kuusk A., Kuusk J., Lang M. 2016: Albedo of the Forested Landscape at the SMEAR-Estonia Research Station. Baltic forestry 22(2), 390-395.
Yli-Pirilä P., Copolovici L., Kännaste A., Noe S., Blande J.D., Mikkonen S., Klemola T., Pulkkinen J., Virtanen A., Laaksonen A., Joutensaari J., Niinemets Ü., Holopainen J. 2016: Herbivory by an Outbreaking Moth Increases Emissions of Biogenic Volatiles and Leads to Enhanced Secondary Organic Aerosol Formation Capacity. Environmental Science & Technology, 50 (21), 11501−11510.
Vana M., Komsaare K., Hõrrak U., Mirme S., Nieminen T., Kontkanen J., Manninen H.E., Petäjä T., Noe S.M. & Kulmala M. 2016: Characteristics of new-particle formation at three SMEAR stations. Boreal Env. Res. 21: 345–362.
Kulmala M., Hõrrak U., Manninen H.E., Mirme S., Noppel M., Lehtipalo K., Junninen H., Vehkamäki H., Kerminen V.-M., Noe S.M. & Tammet H. 2016: The legacy of Finnish–Estonian air ion and aerosol workshops. Boreal Env. Res. 21: 181–206.
Yáñez-Serrano, A. M., Nölscher, A. C., Bourtsoukidis, E., Derstroff, B., Zannoni, N., Gros, V., Lanza, M., Brito, J., Noe, S. M., House, E., Hewitt, C. N., Langford, B., Nemitz, E., Behrendt, T., Williams, J., Artaxo, P., Andreae, M. O., and Kesselmeier, J.: Atmospheric mixing ratios of methyl ethyl ketone (2-butanone) in tropical, boreal, temperate and marine environments, Atmos. Chem. Phys., 16, 10965-10984.
Lappalainen, H. K., Kerminen, V.-M., Petäjä, T., Kurten, T., Baklanov, A., Shvidenko, A., Bäck, J., Vihma, T., ..., Hõrrak, U.,... Noe, S.M., ..., 2016. Pan-Eurasian Experiment (PEEX): Towards holistic understanding of the feedbacks and interactions in the land–atmosphere–ocean–society continuum in the Northern Eurasian region. In Atmos. Chem. Phys., 16,14421-14461.
Noe S.M., Krasnov D., Krasnova A., Cordey H.P.E. & Niinemets Ü. 2016: Seasonal variation and characterisation of reactive trace gas mixing ratios over a hemi-boreal mixed forest site in Estonia. Boreal Env. Res. 21: 332–344.
2015
Noe, S.M., Niinemets, Ü., Krasnova, A., Krasnov, D., Motallebi, A., Kängsepp, V., Jõgiste, K., Hõrrak, U., Komsaare, K., Mirme, S., Vana, M., Tammet, H., Bäck, J., Vesala, T., Kulmala, M., Petäjä, T., Kangur, A. 2015. SMEAR Estonia: Perspectives of a large-scale forest ecosystem – atmosphere research infrastructure. – Forestry Studies | Metsanduslikud Uurimused 63, 56–84.
Mõistus, M., Lang, M. 2015. Leaf area index mapping with optical methods and allometric models in SMEAR flux tower footprint at Järvselja, Estonia. – Forestry Studies | Metsanduslikud Uurimused 63, 85–99.
Forkel, R., Guenther, A., Ashworth, K., Bedos, C., Delon, C., Lathiere, J., Noe, S., Potier, E., Rinne, J., Tchepel, O. and Zhang, L., 2015. Bi-directional Exchange of Volatile Organic Compounds. In Review and Integration of Biosphere-Atmosphere Modelling of Reactive Trace Gases and Volatile Aerosols (pp. 169-179). Springer Netherlands.
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Theobald, M., Loubet, B., Ammann, C., Branislava, L., Chojnicki, B., Ganzeveld, L., Grosz, B., Kaasik, M., Noe, S., Olejnik, J. and Rinne, J., 2015. In-Canopy Turbulence—State of the Art and Potential Improvements. In Review and Integration of Biosphere-Atmosphere Modelling of Reactive Trace Gases and Volatile Aerosols (pp. 215-223). Springer Netherlands.
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2014
Smolander, S., He, Q., Mogensen, D., Zhou, L., Bäck, J., Ruuskanen, T., Noe, S., Guenther, A., Aaltonen, H., Kulmala, M., and Boy, M. (2014). Comparing three vegetation monoterpene emission models to measured gas concentrations with a model of meteorology, air chemistry and chemical transport. Biogeosciences, 11(19), pp.5425–5443.
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Efstratios Bourtsoukidis, Boris Bonn, Steffen M. Noe (2014), On-line field measurements of Bvoc emissions from Norway spruce (Picea abies) at the hemiboreal SMEAR-Estonia site under autumn conditions, Boreal environment research 19, pp,
2013
Sun, Z., Niinemets, Ü., Hüve, K., Rasulov, B. and Noe, S. M. (2013), Elevated atmospheric CO2 concentration leads to increased whole-plant isoprene emission in hybrid aspen (Populus tremula × Populus tremuloides). New Phytologist, 198: 788–800.
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Ülo Niinemets, Paolo Ciccioli, Steffen M. Noe, and Markus Reichstein (2013), Scaling BVOC Emissions from Leaf to Canopy and Landscape: How Different Are Predictions Based on Contrasting Emission Algorithms?, in Biology, Controls and Models of Tree Volatile Organic Compound Emissions, Ü. Niinemets and R.K. Monson (eds.), 357-390, Tree Physiology 5, Springer Science + Business Media Dordrecht 2013
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Lukjanova, Aljona, Mandre, Malle, Saarman, Gerly (2013), Impact of Alkalisation of the Soil on the Anatomy of Norway Spruce (Picea abies) Needles. Water, Air, & Soil Pollution, 224(7), 1-12
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2012
Noe, S. M., Hüve, K., Niinemets, Ü., and Copolovici, L. (2012) Seasonal variation in vertical volatile compounds air concentrations within a remote hemiboreal mixed forest, Atmos. Chem. Phys., 12, 3909-3926
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2011
Steffen M. Noe, Veljo Kimmel, Katja Hüve, Lucian Copolovici, Miguel Portillo-Estrada, Ülle Püttsepp, Kalev Jõgiste, Ülo Niinemets, Lukas Hörtnagl, Georg Wohlfahrt (2011), Ecosystem-scale biosphere–atmosphere interactions of a hemiboreal mixed forest stand at Järvselja, Estonia, Forest Ecology and Management, Volume 262, Issue 2, 15 July 2011, Pages 71-81