Personal profile
Description of research and teaching
I am a palaeoecologist with extensive experience in reconstructing past environmental changes from lake and peat sediment archives. My special expertise is the plant macrofossil method. After completing my PhD in geology in 2005, I have coordinated several research projects funded by the Academy of Finland and the University of Helsinki. I established my own Palaeopeatland reaserch group in 2010. Currently I coordinate two Academy of Finland-funded Arctic palaeopeatland projects. My current research interest is to investigate ecosystem responses to climate and environmental change and associated biogeochemical feedback mechanisms. The motto is “Past is the key to understanding the future”. All research outcome is disseminated widely through various media.
Throughout my work history I have extensively collaborated with a large and interdisciplinary group of scientists. Numerous different projects and the changing combination of co-workers have provided me with the possibility to build up a broad network of colleagues and excellent genuine connections to several research groups worldwide. I am devoted to educating a new generation of academics to meet challenges in the research field of environmental science by providing teaching, supervision and by promoting international connections.
Curriculum vitae
CURRENT POSITION
University researcher, Department of Environmental Sciences, University of Helsinki
Education and training:
Doctor of Philosophy 2005, Department of Geology, University of Helsinki. Title: Plant macrofossil evidence of changes in aquatic and terrestrial environments in north-eastern European Russia and Finnish Lapland since late glacial.
University Pedagogy course (10 ECTS credits) performed in 2008
Docent (=adjunct professor) (Palaeobotany) 2009. Department of Biological and Environmental Sciences, University of Helsinki.
Principal investigator (PI) status 2010.
Fields of Science
- 1171 Geosciences
- long-term environmental change
- peatlands
- Arctic
- palaeoecology
- Palaeobotany
- palaeoclimatology
- 1172 Environmental sciences
- Environmental Change
- Arctic
- Peatlands
Collaborations and top research areas from the last five years
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Pan-Arctic Peatlands Have Expanded During Recent Warming
Handley, J., Fewster, R. E., Sim, T. G., Hodson, S., Parker, B., Crichton, K., Charman, D., Anderson, K., Garneau, M., Väliranta, M., Beilman, D. W., Swindles, G. T., Aquino-lopez, M., Blaauw, M., Comas, X., Levesque, E., Maire, V., Addis, H., Amesbury, M. & Fortier, D. & 2 others, , 13 Feb 2026, In: Global Change Biology. 32, 2, 19 p., e70684.Research output: Contribution to journal › Article › Scientific › peer-review
Open AccessFile -
Peatland dynamics and sensitivities under hyperhumid climates: Paleoecological evidence from glacier-valley peatlands in the southeastern Tibetan Plateau
Xia, Y., Xia, Z., Sun, J., Lu, C., Tang, L., Zhao, W., Li, Y., Yang, Q., Väliranta, M. & Yu, Z., May 2026, In: CATENA. 266, 109932.Research output: Contribution to journal › Article › Scientific › peer-review
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Assessing the Value of Testate Amoebae and their Functional Traits in Detecting Climate Change-Induced Peatland Drying
Kuuri‐Riutta, O., Ganoza, B. P., Ylänne, H., Mitchell, E. A. D., Väliranta, M. M. & Tuittila, E., 20 Dec 2025, In: Microbial Ecology. 89, 1, 12 p., 35.Research output: Contribution to journal › Article › Scientific › peer-review
Open AccessFile -
Climate and water-table levels regulate peat accumulation rates across Europe
Swindles, G. T., Mullan, D. J., Brannigan, N. T., Fewster, R. E., Sim, T. G., Gallego-Sala, A., Blaauw, M., Lamentowicz, M., Jassey, V. E. J., Marcisz, K., Green, S. M., Roland, T. P., Loisel, J., Amesbury, M. J., Blundell, A., Chambers, F. M., Charman, D. J., Evans, C. R. C., Feurdean, A. & Galloway, J. M. & 16 others, , 23 Jul 2025, In: PLoS One. 20, 7, 16 p., e0327422.Research output: Contribution to journal › Article › Scientific › peer-review
Open AccessFile -
Drastic peatland regime shift and landscape disturbances connected to warm and cold climate events over the past centuries in subarctic Finland
Piilo, S. R., Kuoppamaa, M., Tahvanainen, T., Kumpula, T., Kuosmanen, N., Macias-Fauria, M. & Väliranta, M., 16 Jun 2025, In: Boreas. 13 p.Research output: Contribution to journal › Article › Scientific › peer-review
Open AccessFile
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PeatResC: Peatlands, Climate Change and Ecological Restoration
Väliranta, M. (Project manager)
01/01/2026 → 31/12/2028
Project: Research Council of Finland: Centre of Exellence
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Walden säätiö/Djupsjöbacka
Väliranta, M. (Project manager)
Tellervo ja Juuso Waldenin säätiö sr c/o Bilanssi Oy
01/07/2025 → 31/12/2027
Project: Foundations (Private Foundations, Non-Profit Foundations, Charitable Trusts)
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Sokli-aineistoihin perustuvan kirjan jul
Väliranta, M. (Project manager)
11/03/2025 → 31/12/2026
Project: Foundations (Private Foundations, Non-Profit Foundations, Charitable Trusts)
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Opening Pandora’s Box: Assessing The Risks of Permafrost Thaw to Environment and Human Health
Väliranta, M. (Project manager), Korhola, A. (Project manager), Weckström, J. (Principal Investigator), Kontro, M. H. (Principal Investigator), Bianchi, F. (Principal Investigator), Passananti, M. (Co-Principal Investigator), Vapalahti, O. (Principal Investigator), Sironen, T. (Principal Investigator), Korhonen, E. M. (Co-Principal Investigator), Green, S. (Principal Investigator), Toivanen, R. (Principal Investigator), Kiss, E. A. (Co-Principal Investigator), Smura, T. (Co-Principal Investigator), Pilkama, H. E. (Participant), Deresh, A. (Participant), Haglund, A. K. (Participant) & Karkela, P. K. (Participant)
01/01/2025 → 31/12/2027
Project: Research project
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Boreaalisten soiden kuivuminen – vaikutukset ja mekanismit
Tuittila, E.-S. (Project manager) & Väliranta, M. (Principal Investigator)
01/08/2020 → …
Project: Research project
Activities
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Proposal evaluation for NWO, Netherlands
Väliranta, M. (Participant)
2026 → …Activity: Other activity types › Types for other activities - Other
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Mires and Peat (Journal)
Väliranta, M. (Reviewer)
2026 → …Activity: Publication peer-review and editorial work types › Peer review of manuscripts
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Palaeogeography, Palaeoclimatology, Palaeoecology (Journal)
Väliranta, M. (Reviewer)
2025 → …Activity: Publication peer-review and editorial work types › Peer review of manuscripts
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Review of Helmholz center project application
Väliranta, M. (Participant)
Oct 2025 → …Activity: Other activity types › Types for other activities - Other
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Quaternary Science Reviews (Journal)
Väliranta, M. (Reviewer)
2025 → …Activity: Publication peer-review and editorial work types › Peer review of manuscripts
Press/Media
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Tammenlastuja: Menneisyys opettaa
Heikkilä, M., Manninen, M. A., Valtonen, T. A. I., Weckström, J., Oinonen, M., Tallavaara, M., Eronen, J. T., Kahilainen, K., Piro, A., Malinen, T., Hellsten, S., Mykrä, H., Tolonen, K., Harkonen, L. S., Pokka, P. H., Auvinen, P., Väliranta, M., Arppe, L., Ekholm, P., Salonen, J. S., Zimmermann, H., Ribeiro, S., Saarni, S., Vinni, M. & Atti, S. M.
10/10/2023
1 item of Media coverage
Press/Media: Press / Media
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