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Publikationer 1983 2019

2013

Production of different pelagic energy mobilisers in boreal lakes varies in relation to morphometry and concentration of dissolved organic carbon

Kankaala, P., López Bellido, J., Ojala, A., Tulonen, T. & Jones, R. I., 2013, I : Ecosystems. 16, 6, s. 1152-1164 12 s.

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Rhizosphere processes play an important role in soil organic matter; Decomposition and greenhouse gas fluxes in boreal landscape; Summary of soil research carried out at FCoE during the second FCoE period (2009-2013)

Pumpanen, J., Heinonsalo, J., Pihlatie, M., Aaltonen, H., Berninger, F., Bäck, J., Hari, P., Kieloaho, A-J., Korhonen, J., Köster, K., Linden, A., Kulmala, L., Kulmala, M., Nikinmaa, E., Ojala, A., Rasilo, T. & Vesala, T., 2013, Proceedings of FCoE in 'Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change' Annual Meeting 2013. Kulmala, M., Lappalainen, H. K., Brus, M. & Kontkanen, J. (red.). Helsinki, s. 76-85 10 s. (Report Series in Aerosol Science; nr. 142).

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskaplig

Sustainable algal biomass products by cultivation in waste water flows

Arkkola, H., Arnold, M., Hytönen, E., Kostia, S., Kymäläinen, M., Liitia, T., Mattinen, M., Ojala, A., Ohra-aho, T., Pere, J., Spilling, K., Tikka, M., Valkonen, K. S., Wang, Y. & Wiebe, M., 2013, 66 s. (VTT Research Reports; nr. VTT-R-04909-13)

Forskningsoutput: Bok/rapportBeställd rapportProfessionell

Variable production by different pelagic energy mobilizers in boreal lakes

Kankaala, P., López Bellido, J., Ojala, A., Tulonen, T. & Jones, R. I., 2013, I : Ecosystems. 16, 6, s. 1152-1164 13 s.

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Weak response of the microbial food web of a boreal humic lake to hypolimnetic anoxia

Peltomaa, E., Zingel, P. & Ojala, A., 2013, I : Aquatic Microbial Ecology. 68, 2, s. 91-105 15 s.

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

2012

Boreal and Arctic water balance under a climate change: combining multiple source data to detect trends in ecosystem functioning

Berninger, F., Kasurinen, V., Ojala, A. & Nikinmaa, E., 2012, Report Series in Aerosol Science, Part A: Proceeding of FCoE in 'Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change' and NCoE in 'Cryosphere - Atmosphere Interactions in a Changing Climate' . Kulmala, M., Lappalainen, H. K., Boy, M., Brus, M. & Nieminen, T. (red.). Vol. 134. s. 175-178 4 s. (Report Series in Aerosol Science, Part A; vol. 134).

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskaplig

DOC flux in a boreal forested catchment

Rasilo, T., Starr, M., Ojala, A. & Pumpanen, J., 2012, Proceedings of the Finnish Doctoral Programme in Atmospheric Composition and Climate Change ACCC Annual Meeting 9.–10.1.2012. Kulmala, M., Lauri, A., Brus, M. & Nieminen, T. (red.). Helsinki: Finnish Association for Aerosol Research, s. 60 1 s. (Report Series in Aerosol Science; nr. 129).

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskaplig

Eddy Covariance Measurements over Lakes

Vesala, T., Eugster, W. & Ojala, A., 2012, Eddy Covariance: A Practical Guide to Measurement and Data Analysis. Aubinet, M., Vesala, T. & Papale, D. (red.). Springer, s. 365-376 12 s. (Springer Atmospheric Sciences).

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKapitelVetenskaplig

Energy exchange and DOM production in boreal forest in relation to cryosphere processes

Kasurinen, V., Berninger, F. & Ojala, A., 2012, Report Series in Aerosol Science, Part A: Proceedings of FCoE in 'Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change' and NCoE in 'Cryosphere - Atmosphere Interactions in a Changing Climate'. Annual Meeting 2012. Markku, K., Lappalainen, H. K., Boy, M. & Brus, M. (red.). HELSINKI, Vol. 134. s. 338-340 3 s. (Report Series in Aerosol Science, part A).

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskaplig

From water-air interfaces to carbon-water cycles

Vesala, T., Mammarella, I., Alekseychik, P., Dengel, S., Haapanala, S., Heiskanen, J., Keronen, P. I. R., Kujansuu, J., Pihlatie, M., Raivonen, M., Rinne, J., Tomasic, M., Smolander, S., Hölttä, T., Juurola, E., Kolari, P., Aalto, T., Laurila, T., Ojala, A., Tuittila, E-S. & 3 andraLevula, J., Bäck, J. & Nikinmaa, E., 2012, Proceedings of FCoE in 'Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change' and NCoE in 'Cryosphere-Atmosphere Interactions in a Changing Climate' Annual Meetings 2012. s. 121-124 4 s. (Report Series in Aerosol Science; nr. 134).

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskaplig

Meteorological drivers of the dynamics of autotrophic picoplankton

Peltomaa, E. & Ojala, A., maj 2012, I : Freshwater Biology. 57, 5, s. 1005-1016 12 s.

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Rain-induced changes in CO2 concentrations in the soil-lake-brook continuum of a boreal forested catchment

Rasilo, T., Ojala, A., Huotari, J. & Pumpanen, J., 2012, I : Vadose Zone Journal. 11, 2, 14 s.

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Response of a microbial food web to prolonged seasonal hypoxia in a boreal lake

Brek-Laitinen, G., López Bellido, J. & Ojala, A., 4 jan 2012, I : Aquatic Biology. 14, 2, s. 105-120 16 s.

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Öppen tillgång
Fil

Soil CO2 concentrations and fluxes in a boreal headwater catchment

Rasilo, T., Pumpanen, J. & Ojala, A., 2012, Report Series in Aerosol Science, Part A: Proceedings of FCoE in 'Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change' and NCoE in 'Cryosphere-Atmosphere Interactions in a Changing Climate'. Annual Meeting 2012.. Kulmala, M., Lappalainen, H. K., Boy, M. & Brus, M. (red.). Vol. 134. s. 538-543 6 s. (Report Series in Aerosol Science, Part A).

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskaplig

2011

An urban boreal lake basin as a source of CO2 and CH4

López Bellido, J., Peltomaa, E. & Ojala, A., 2011, I : Environmental Pollution. 159, 6, s. 1649-1659 11 s.

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Carbon pools and fluxes in a chain of five boreal lakes: A dry and wet year comparison

Einola, E., Rantakari, M. M., Kankaala, P., Kortelainen, P., Ojala, A., Pajunen, H., Mäkelä, S. & Arvola, L., jul 2011, I : Journal of Geophysical Research : Biogeosciences. 116, G03009, s. 1-13 13 s.

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

DOC concentration and quality in the riparian zone of a forested boreal catchment

Rasilo, T., Ojala, A., Starr, M. & Pumpanen, J., 2011, Proceedings of the Finnish Center of Excellence and Graduate School in 'Physics, Chemistry, Biology and Meteorology ofAtmospheric Composition and Climate Change' Annual Workshop 18.–20.5.2011. Kulmala, M., Bäck, J., Lappalainen, H. K. & Nieminen, T. (red.). Helsinki: Finnish Assosiation for Aerosol Research, s. 334-338 5 s. (REPORT SERIES IN AEROSOL SCIENCE; nr. 126).

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskaplig

Emissions of volatile organic compounds from a boreal humic lake

Bäck, J., Ojala, A., Pumpanen, J., Sjöblom, H., Aaltonen, H., Hakola, H. & Hellen, H., 2011, Proceedings of CRAICC Annual Meeting 2011. s. 43-46 4 s. (Report series in aerosol science; vol. 128).

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskaplig

Grazing of heterotrophic nanoflagellates on the eukaryotic picoautotroph Choricystis sp.

Brek-Laitinen, G. & Ojala, A., 2011, I : Aquatic Microbial Ecology. 62, 1, s. 49-59 11 s.

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Long-term direct CO2 flux measurements over a boreal lake: Five years of eddy covariance data

Huotari, J., Ojala, A., Peltomaa, E., Nordbo, A., Launiainen, S., Pumpanen, J., Rasilo, T., Hari, P. & Vesala, T., 2011, I : Geophysical Research Letters. 38, s. L18401 5 s.

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Long-term energy flux measurements and energy balance over a small boreal lake using eddy covariance technique

Nordbo, A., Launiainen, S., Mammarella, I., Leppäranta, M., Huotari, J., Ojala, A. & Vesala, T., 2011, I : Journal of Geophysical Research : Atmospheres. 116, s. 1-17 17 s.

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

On eddy covariance flux measurements over lakes

Vesala, T., Nordbo, A., Haapanala, S., Mammarella, I., Pumpanen, J., Eugster, W., Huotari, J. & Ojala, A., 2011, Proceedings of the Finnish Center of Excellence and Graduate School in 'Physics, Chemistry, Biology and Meteorology ofAtmospheric Composition and Climate Change'. s. 395-398 4 s. (Report series in aerosol science; vol. 126).

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskaplig

Spatial and temporal variation in denitrification and in the denitrifier community in a boreal lake

Rissanen, A., Tiirola, M. & Ojala, A., 2011, I : Aquatic Microbial Ecology. 64, 1, s. 27-40 14 s.

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

2010

Application of CO2 concentration gradient method for determining soil respiratory fluxes and time delays between photosynthesis and soil respiration

Pumpanen, J., Kulmala, L., Hari, P., Vargas, R., Ojala, A., Vesala, T. & Nikinmaa, E., 2010, Proceedings of the Finnish Center of Excellence and Graduate School in 'Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change' Annual Workshop 17.-19.5.2010. 6 s. (Report Series in Aerosol Science A; vol. 109).

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskaplig

DOC concentration in various compartments of a forested boreal catchment and responses to rain events

Rasilo, T., Ojala, A. & Pumpanen, J., 2010, Proceedings of the Finnish Center of Excellence and Graduate School in 'Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change' Annual Workshop 17.-19.5.2010. Helsinki: Finnish Association for Aerosol Research, 5 s. (Report series in aerol science; nr. 109).

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskaplig

Micrometeorology and energy balance of a small boreal lake

Nordbo, A., Launiainen, S., Mammarella, I., Leppäranta, M., Huotari, J., Ojala, A. & Vesala, T., 2010, Proceedings of the Finnish Center of Excellence and Graduate School in 'Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change. (Report Series in Aerosol Science A; nr. 109).

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskaplig

Size-related photosynthesis of algae in a strongly stratified humic lake

Peltomaa, E. & Ojala, A., 2010, I : Journal of Plankton Research. 32, 3, s. 341-355 15 s.

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

2009

Carbon flow through an old-growth forest catchment into a lake in southern boreal zone in Finland

Rasilo, T., Huotari, J., Ojala, A. & Pumpanen, J., 2009, Proceedings of the Finnish Center of Excellence and Graduate School in "Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change Annual workshop 27.-29.4.2009 Markku Kulmala, Jaana Bäck, Tuomo Nieminen and Antti Lauri, editors. Finnish Association for Aerosol Research, s. 361-365 5 s. (Report series in aerosol science; nr. 102).

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskaplig

CO2 and CH4 fluxes during spring and autumn mixing periods in a boreal lake (Paajarvi, southern Finland)

Bellido, J. L., Tulonen, T., Kankaala, P. & Ojala, A., 2009, I : Journal of Geophysical Research. 114, 12 s., 04007.

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Monitieteisen hiilen matkassa

Ojala, A. & Pumpanen, J. S., 2009, I : Luonnon Tutkija. 113, 2, s. 51 1 s.

Forskningsoutput: TidskriftsbidragArtikelVetenskaplig

Temporal variations in surface water CO concentration in a boreal humic lake based on high-frequency measurements

Huotari, J., Ojala, A., Peltomaa, E., Pumpanen, J., Hari, P. & Vesala, T., 2009, I : Boreal Environment Research. 14 , Supplement A, s. 48-60 13 s.

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

2008

CO2 concentration in a boreal lake and its riparian zone soil matrix - transfer of terrestrial carbon into aquatic ecosystems

Rasilo, T., Pumpanen, J. & Ojala, A., 2008, Proceedings of the Finnish Graduate School 'Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change': workshop 22.-23.4.2008. Kulmala, M. & Lauri, A. (red.). Helsinki, s. 65 (Report Series in Aerosol Science; nr. 97).

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskaplig

High-frequency measurements of productivity of planktonic algae using rugged nondispersive infrared carbon dioxide probes

Hari, P., Pumpanen, J. S., Huotari, J., Kolari, P., Grace, J., Vesala, T. & Ojala, A., 2008, I : Limnology and Oceanography: Methods. 6, s. 347-354 8 s.

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Micrometeorological studies of biosphere-atmosphere exchange

Vesala, T., Launiainen, S., Aalto, P., Aaltonen, H., Grönholm, T., Haapanala, S., Hannuniemi, H., Hölttä, T., Järvi, L., Keronen, P., Kieloaho, A-J., Kulmala, M., Mammarella, I., Pihlatie, M., Rannik, U., Rinne, J., Sevanto, S., Sogachev, A., Suni, T., Taipale, R. & 17 andraAalto, T., Aurela, M., Laurila, T., Viisanen, Y., Markkanen, T. S., Huotari, J., Ojala, A., Ilvesniemi, H., Altimir, N., Kolari, P., Kulmala, L., Mäkelä, A., Nikinmaa, E., Perämäki, M., Riutta, T., Tuittila, E-S. & Hari, P., 2008, Proceedings of the Finnish Center of Excellence "Research Unit on Physics, Chemistry and Biology of Atmospheric Composition and Climate Change" activities in 2002-2007 / editors: Markku Kulmala, Jaana Bäck, and Martta Salonen. Finnish Association for Aerosol Research, s. 5-14 10 s. (Report series in aerosol science; nr. 94).

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskaplig

2006

Eddy covariance measurements of carbon exchange and latent and sensible heat fluxes over a boreal lake for a full open-water

Vesala, T., Huotari, J., Rannik, U., Suni, T., Smolander, S., Sogachev, A., Launiainen, S. & Ojala, A., 2006, I : Journal of Geophysical Research. 111, D11, s. D11101 12 s.

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Kokofraktioitu perustuotanto eräässä eteläsuomalaisessa pienessä humusjärvessä: size fractionated primary production in a small humic lake in southern Finland

Peltomaa, E. & Ojala, A., 2006, Suurjärviseminaari 2006. Joensuu: Joensuun yliopisto, s. 120-124 5 s.

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKapitelVetenskapligPeer review

Long-term measurements of CO2 exchange over a boreal lake

Ojala, A., Huotari, J., Peltomaa, E. & Vesala, T., 2006, Proceedings of BACCI, NECC and FCoE activities 2005: Book B. Kulmala, M., Lindroth, A. & Ruuskanen, T. M. (red.). Helsinki: Finnish Association for Aerosol Research, s. 438-441 4 s. (Report Series in Aerosol Science; nr. 81B).

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskaplig

Methanotrophic activity in relation to methane efflux and total heterotrophic bacterial production in a stratified, humic, boreal lake

Kankaala, P., Huotari, J., Peltomaa, E., Saloranta, T. & Ojala, A., 2006, I : Limnology and Oceanography. 51, 2, s. 1195-1204 10 s.

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Solubility of carbon dioxide in natural systems

Salminen, J., Kobylin, P. & Ojala, A., 2006, Thermodynamics, Solubility and Environmental Issues. Elsevier Scientific Publ. Co, s. 189-203

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKapitelVetenskapligPeer review

2005

Application of the micrometeorological EC technique to CO2 flux measurements from a lake

Huotari, J., Kankaala, P., Keronen, P., Ojala, A., Peltomaa, E., Rannik, U. & Vesala, T., 2005, Proceedings of the International Association of Theoretical and Applied Limnology. Vol. 29:2. s. 590-593 4 s.

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskapligPeer review

Control mechanisms of cyanobacterial blooms in lakes of varying trophic status and morphometry

Mäkelä, S., Huitu, E., Tulonen, T. & Ojala, A., 2005, I : Verhandlungen der Internationalen Vereinigung für theoretische und angewandte Limnologie. 29, s. 953-955 3 s.

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Footprint analysis for eddy covariance measurements on a small boreal lake

Smolander, S., Sogachev, A., Huotari, J., Ojala, A. & Vesala, T., 2005, Reseach Unit on Physics, Chemistry and Biology of Atmospheric Composition and Climate Change: III Progress Report and Proceedings of Seminar in Pallas 29.3.-1.4.2005. Kulmala, M. & Ruuskanen, T. (red.). Helsinki: Finnish Association for Aerosol Research, s. 275-278 4 s. (Report Series in Aerosol Science; nr. 73).

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskaplig

Methane efflux in relation to plant biomass and sediment characteristics in stands of three common emergent macrophytes in boreal mesoeutrophic lakes

Kankaala, P., Käki, T., Mäkelä, S., Ojala, A., Pajunen, H. & Arvola, L., 2005, I : Global Change Biology. 11, 1, s. 145-153 9 s.

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Robust parameters confirm predominance of heterotrophic processes in the plankton of a highly humic pond

Salonen, K., Hammar, T., Kuuppo, P., Smolander, U. & Ojala, A., 2005, I : Hydrobiologia. 543, 1, s. 181-189 9 s.

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Seasonal and ontogenetic changes in food utilization of Mysis relicta

Ikonen, S., Hakala, I. & Ojala, A., 2005, Proceedings of the International Association of Theoretical and Applied Limnology (SIL). Jones, J. (red.). s. 764-767 4 s. ( INTERNATIONAL ASSOCIATION OF THEORETICAL AND APPLIED LIMNOLOGY - PROCEEDINGS; vol. 29, nr. Part: 2 ).

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskapligPeer review