Photo of Anne Ojala
  • Niemenkatu 73

    00014

    Finland

  • Viikinkaari 1, Biocentre 3

    00790 Helsinki

    Finland

  • Viikinkaari 5, Biocenter 2

    00790 Helsinki

    Finland

  • Viikinkaari 1, Biokeskus 3

    00790 Helsinki

    Finland

1983 …2023
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Publications 1983 2019

2019

Applicability and consequences of the integration of alternative models for CO2 transfer velocity into a process-based lake model

Kiuru, P., Ojala, A., Mammarella, I., Heiskanen, J., Erkkila, K-M., Miettinen, H., Vesala, T. & Huttula, T., 4 Sep 2019, In : Biogeosciences. 16, 17, p. 3297-3317 21 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
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Ecosystem responses to increased organic carbon concentration: comparing results based on longterm monitoring and whole-lake experimentation

Kankaala, P., Arvola, L., Hiltunen, M., Huotari, J., Jones, R. I., Hannu, N., Ojala, A., Olin, M., Peltomaa, E., Peura, S., Rask, M., Tulonen, T. & Vesala, S., 2 Oct 2019, In : Inland waters. 9, 4, 14 p.

Research output: Contribution to journalArticleScientificpeer-review

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Influence of long term nitrogen limitation on lipid, protein and pigment production of Euglena gracilis in photoheterotrophic cultures

Tossavainen, M., Ilyass, U., Ollilainen, V., Valkonen, K., Ojala, A. & Romantschuk, M., 1 Apr 2019, In : PeerJ. 7, 19 p., 6624.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
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Open Access
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Rotifer communities under variable predation-turbulence combinations

Horppila, J., Härkönen, L., Hellén, N., Estlander, S., Pekcan-Hekim, Z. & Ojala, A., Feb 2019, In : Hydrobiologia. 828, 1, p. 339-351 13 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
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2018

Beavers affect carbon biogeochemistry: both short-term and long-term processes are involved.

Nummi, P. J., Vehkaoja, M. C., Pumpanen, J. S. & Ojala, A. K., Oct 2018, In : Mammal Review. 48, 4, p. 298-311 14 p.

Research output: Contribution to journalReview ArticleScientificpeer-review

Conversion of biowaste leachate to valuable biomass and lipids in mixed cultures of Euglena gracilis and chlorophytes

Tossavainen, M., Katyal, N., Silja, K., Valkonen, K., Sharma, A. K., Sharma, S., Ojala, A. & Romantschuk, M., Nov 2018, In : Algal Research. 35, p. 76-84 9 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
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Effects of Climate Change on CO2 Concentration and Efflux in a Humic Boreal Lake: A Modeling Study

Kiuru, P., Ojala, A., Mammarella, I., Heiskanen, J., Kämäräinen, M., Vesala, T. & Huttula, T., Jul 2018, In : Journal of Geophysical Research : Biogeosciences. 123, 7, p. 2212-2233 22 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
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Effects of similar weather patterns on the thermal stratification, mixing regimes and hypolimnetic oxygen depletion in two boreal lakes with different water transparency

Mammarella, I., Gavrylenko, G., Zdorovennova, G., Ojala, A., Erkkilä, K-M., Zdorovennov, R., Stepanyuk, O., Palshin, N., Terzhevik, A., Vesala, T. & Heiskanen, J., Aug 2018, In : Boreal Environment Research. 23, p. 237-247 11 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
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High-frequency productivity estimates for a lake from free-water CO2 concentration measurements

Provenzale, M., Ojala, A., Heiskanen, J., Erkkila, K-M., Mammarella, I., Hari, P. & Vesala, T., 9 Apr 2018, In : Biogeosciences. 15, 7, p. 2021-2032 12 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
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Methane and carbon dioxide fluxes over a lake: comparison between eddy covariance, floating chambers and boundary layer method

Erkkilä, K-M., Ojala, A., Bastviken, D., Biermann, T., Heiskanen, J. J., Lindroth, A., Peltola, O., Rantakari, M., Vesala, T. & Mammarella, I., 19 Jan 2018, In : Biogeosciences. 15, 2, p. 429-445 17 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
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2017

Culturing of Selenastrum on diluted composting fluids; conversion of waste to valuable algal biomass in presence of bacteria

Tossavainen, M., Nykänen, A., Valkonen, K. S., Ojala, A., Silja, K. & Romantschuk, M., Aug 2017, In : Bioresource Technology. 238, p. 205-213 9 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
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Iron and pH regulating the photochemical mineralization of dissolved organic carbon

Gu, Y., Lensu, A., Perämäki, S., Ojala, A. K. & Vähätalo, A. V., May 2017, In : ACS Omega. 2, p. 1905-1914

Research output: Contribution to journalArticleScientificpeer-review

Open Access
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Methylophilaceae and Hyphomicrobium as target taxonomic groups in monitoring the function of methanol-fed denitrification biofilters in municipal wastewater treatment plants

Rissanen, A. J., Ojala, A., Fred, T., Toivonen, J. & Tiirola, M., Jan 2017, In : Journal of Industrial Microbiology and Biotechnology. 44, 1, p. 35-47 13 p.

Research output: Contribution to journalArticleScientificpeer-review

Seasonal variation in nutrient removal efficiency of a boreal wetland detected by high-frequency on-line monitoring

Valkama, P., Mäkinen, E., Ojala, A., Vahtera, H., Lahti, K., Rantakokko, K., Vasander, H., Nikinmaa, E. & Wahlroos, O., Jan 2017, In : Ecological Engineering. 98, p. 307-317 11 p.

Research output: Contribution to journalArticleScientificpeer-review

2016

Atmosphere-land-lake carbon cycle provides possibilities for economic studies

Heiskanen, J. J., Mammarella, I., Ojala, A. K. & Vesala, T. V., 2016, In : Report Series in Aerosol Science. 180, p. 187-188 2 p.

Research output: Contribution to journalConference articleScientific

LAKE 2.0: A model for temperature, methane, carbon dioxide and oxygen dynamics in lakes

Stepanenko, V., Mammarella, I., Ojala, A. K., Miettinen, H. M., Lykosov, V. N. & Vesala, T. V., 2016, In : Geoscientific Model Development. 9, 5, p. 1977-2006 30 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
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Methylophaga and Hyphomicrobium can be used as target genera in monitoring saline water methanol-utilizing denitrification

Rissanen, A. J., Ojala, A., Dernjatin, M., Jaakkola, J. & Tiirola, M., Dec 2016, In : Journal of Industrial Microbiology and Biotechnology. 43, 12, p. 1647-1657 11 p.

Research output: Contribution to journalArticleScientificpeer-review

Modeling nonlinear responses of DOC transport in boreal catchments in Sweden

Kasurinen, V., Alfredsen, K., Ojala, A., Pumpanen, J., Weyhenmeyer, G. A., Futter, M. N., Laudon, H. & Berninger, F., Jul 2016, In : Water Resources Research. 52, 7, p. 4970-4989 20 p.

Research output: Contribution to journalArticleScientificpeer-review

Nostetta suomalaiseen vesitutkimukseen

Ojala, A. K., Dec 2016, In : energiaopas.net. p. 6 1 p.

Research output: Contribution to journalArticleGeneral public

Real-time detection of arsenic cations from ambient air in boreal forest and lake environments

Faust, J. A., Junninen, H., Ehn, M., Chen, X., Ruusuvuori, K., Kieloaho, A-J., Bäck, J., Ojala, A., Jokinen, T., Worsnop, D. R., Kulmala, M. & Petäjä, T., Feb 2016, In : Environmental Science & Technology Letters. 3, 2, p. 42-46 5 p.

Research output: Contribution to journalArticleScientificpeer-review

2015

A process-based model for simulation of lake DIC and oxygen

Kiuru, P., Ojala, A. K., Mammarella, I. & Huttula, T., 2015, (Submitted) In : Boreal Environment Research.

Research output: Contribution to journalArticleScientificpeer-review

Carbon dioxide and energy fluxes over a small boreal lake in Southern Finland

Mammarella, I., Nordbo, A., Rannik, U., Haapanala, S., Levula, J., Laakso, H., Ojala, A., Peltola, O., Heiskanen, J., Pumpanen, J. & Vesala, T., Jul 2015, In : Journal of Geophysical Research : Biogeosciences. 120, 7, p. 1296-1314 19 p.

Research output: Contribution to journalArticleScientificpeer-review

Concentrations and quality of DOC along the terrestrial-aquatic continuum in a boreal forested catchment

Rasilo, T., Ojala, A., Huotari, J., Starr, M. & Pumpanen, J., 2015, In : Freshwater Science. 34, 2, p. 440-455 16 p.

Research output: Contribution to journalArticleScientificpeer-review

Effects of water clarity on lake stratification and lake-atmosphere heat exchange

Heiskanen, J. J., Mammarella, I., Ojala, A., Stepanenko, V., Erkkila, K-M., Miettinen, H., Sandström, H., Eugster, W., Lepparanta, M., Jarvinen, H., Vesala, T. & Nordbo, A., 16 Aug 2015, In : Journal of Geophysical Research : Atmospheres. 120, 15, p. 7412-7428 17 p.

Research output: Contribution to journalArticleScientificpeer-review

Urban wetland parks in Finland: improving water quality and creating endangered habitats

Wahlroos, O. M., Valkama, P., Mäkinen, E., Ojala, A., Vasander, H., Väänänen, V-M., Halonen, A., Linden, L., Nummi, P., Ahponen, H., Lahti, K., Vessman, T., Rantakokko, K. & Nikinmaa, E., 2015, In : International Journal of Biodiversity Science, Ecosystem Services & Management. 11, 1, p. 46-60 15 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
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2014

Combined Effects of Turbulence and Different Predation Regimes on Zooplankton in Highly Colored Water-Implications for Environmental Change in Lakes

Härkönen, L., Pekcan-Hekim, Z., Hellen, N., Ojala, A. & Horppila, J., 2014, In : PLoS One. 9, 11, 13 p., 111942.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
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Comparison on eddy covariance and floating chamber measurements of CO2 and CH4 fluxes over a boreal lake

Erkkilä, K-M., Gutierrez de los Rios, M. L., Heiskanen, J. J., Miettinen, H. M., Peltola, O. P., Ojala, A. K., Vesala, T. V. & Mammarella, I., Nov 2014, Proceedings of 'the Center of Excellence in Atmospheric Sciences (CoE ATM) - From Molecular and Biological Processes to the Global Climate' Annual Meeting 2014. Aerosolitutkimusseura ry, p. 246-249 4 p. (Report Series in Aerosol Science; vol. 2014, no. 157).

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Effects of cooling and internal wave motions on gas transfer coefficients in a boreal lake

Heiskanen, J. J., Mammarella, I., Haapanala, S., Pumpanen, J., Vesala, T., Macintyre, S. & Ojala, A., 2014, In : Tellus. Series B: Chemical and Physical Meteorology. 66, 16 p., 22827.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
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Greenhouse gases and micrometeorology research team: overview of scientific activities

Mammarella, I., Vesala, T., Alekseychik, P., Dengel, S., Erkkilä, K-M., Heiskanen, J., Keronen, P., Kolari, P., Nordbo, A., Peltola, O., Provenzale, M., Räsänen, M., Rannik, U., Aalto, T., Järvi, L., Laurila, T., Ojala, A., Tuittila, E-S., Levula, J., Praplan, A. & 4 others, Pihlatie, M., Rinne, J., Pumpanen, J. & Bäck, J., 2014, Proceedings of 'the Center of Excellence in Atmospheric Sciences (CoE ATM) –From Molecular and Biological Processes to the Global Climate’ Annual Meeting 2014. Kulmala, M., Lintunen, A. & Kontkanen, J. (eds.). Helsinki: Finnish Association for Aerosol Research, p. 99-105 7 p. (Report Series in Aerosol Science; vol. 157).

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Increasing precipitation enhances the riverine transport of carbon but decreases the proportion of inorganic carbon

Rantakari, M. M., Kortelainen, P., Räike, A. & Ojala, A., 2014, (Submitted) In : Ecosystems.

Research output: Contribution to journalArticleScientificpeer-review

Project for the measurement of greenhouse gas exchanges over lake Vanajavesi with the Eddy Covariance technique

Provenzale, M., Arvola, L. M. J., Mammarella, I., Ojala, A. K., Rantala, P. A. I. & Vesala, T. V., 2014, Proceedings of 'the Center of Excellence in Atmospheric Sciences (CoE ATM) –From Molecular and Biological Processes to the Global Climate’ Annual Meeting 2014. Kulmala, M., Lintunen, A. & Kontkanen, J. (eds.). Helsinki: Finnish Association for Aerosol Research, p. 533-535 3 p. (Report Series in Aerosol Science; vol. 157).

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

2013

Changes in phytoplankton in a boreal lake during a 14-year period

Peltomaa, E., Ojala, A., Holopainen, A-L. & Salonen, K., 27 Sep 2013, In : Boreal Environment Research. 18, 5, p. 387-400 14 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
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Concentrations of CO2 and CH4 in water columns of two stratified boreal lakes during a year of atypical summer precipitation

López Bellido, J., Tulonen, T., Paula, K. & Ojala, A., 2013, In : Biogeochemistry. 113, 1-3, p. 613-627 15 p.

Research output: Contribution to journalArticleScientificpeer-review

Contrasting CO2 concentration discharge dynamics in headwater streams: a multi-catchment comparison

Dinsmore, K. J., Wallin, M. B., Johnson, M. S., Billett, M. F., Bishop, K., Pumpanen, J. & Ojala, A., 2013, In : Journal of Geophysical Research : Biogeosciences. 118, 2, p. 445-461 17 p.

Research output: Contribution to journalArticleScientificpeer-review

Efficient gas exchange between a boreal river and the atmosphere

Huotari, J., Haapanala, S., Pumpanen, J., Vesala, T. & Ojala, A., 2013, In : Geophysical Research Letters. 40, 21, p. 5683-5686 4 p.

Research output: Contribution to journalArticleScientificpeer-review

Emissions of volatile organic compounds from boreal humic lakes

Aaltonen, H., Hakola, H., Ojala, A., Klemedtsson, L., Pumpanen, J., Peltomaa, E. & Bäck, J., 2013, Proceedings of FCoE in 'Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change' Annual Meeting 2013. p. 152-154 3 p. (Report Series in Aerosol Science; vol. Nro 142 (2013)).

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Evidence of lateral transport of carbon gases of terrestrial origin in boreal aquatic ecosystems

Ojala, A., Pumpanen, J., Rasilo, T., Miettinen, H., Rantakari, M. M., Heiskanen, J., Mammarella, I., Huotari, J., Kankaala, P., Levula, J., Bäck, J., Hari, P. & Vesala, T., 2013, Proceedings of FCoE in 'Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change' Annual Meeting 2013. p. 429-432 4 p. (Report Series in Aerosol Science; vol. Nro 142 (2013)).

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Fatty acid composition as biomarkers of freshwater microalgae: analysis of 37 strains of microalgae in 22 genera and in seven classes

Taipale, S., Strandberg, U., Peltomaa, E., Galloway, A. W. E., Ojala, A. & Brett, M. T., 16 Dec 2013, In : Aquatic Microbial Ecology. 71, 2, p. 165-178 14 p.

Research output: Contribution to journalArticleScientificpeer-review

Interlake variation and environmental controls of denitrification across different geographical scales

Rissanen, A., Tiirola, M., Hietanen, S. & Ojala, A., 3 Apr 2013, In : Aquatic Microbial Ecology. 69, 1, p. 1-16 16 p.

Research output: Contribution to journalArticleScientificpeer-review

Lake-size dependent physical forcing drives carbon dioxide and methane effluxes from lakes in a boreal landscape

Kankaala, P., Huotari, J., Tulonen, T. & Ojala, A., 2013, In : Limnology and Oceanography. 58, 6, p. 1915-1930 16 p.

Research output: Contribution to journalArticleScientificpeer-review

Long term measurements of carbon dioxide and methane fluxes over a small boreal lake in Southern Finland

Mammarella, I., Erkkilä, K-M., Haapanala, S., Heiskanen, J., Ojala, A. & Vesala, T., 2013, Proceedings of FCoE in 'Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change' Annual Meeting 2013. p. 381-385 5 p. (Report Series in Aerosol Science; vol. Nro 142 (2013)).

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific