University of Oulu

Marttila, H., Lohila, A., Ala-Aho, P., Noor, K., Welker, J. M., Croghan, D., Mustonen, K., Meriö, L.-J., Autio, A., Muhic, F., Bailey, H., Aurela, M., Vuorenmaa, J., Penttilä, T., Hyöky, V., Klein, E., Kuzmin, A., Korpelainen, P., Kumpula, T., … Kløve, B. (2021). Subarctic catchment water storage and carbon cycling – Leading the way for future studies using integrated datasets at Pallas, Finland. Hydrological Processes, 35( 9), e14350.

Subarctic catchment water storage and carbon cycling : leading the way for future studies using integrated datasets at Pallas, Finland

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Author: Marttila, Hannu1; Lohila, Annalea2,3; Ala-Aho, Pertti1;
Organizations: 1Water, Energy and Environmental Engineering Research Unit, University of Oulu, Oulu, Finland
2Finnish Meteorological Institute FMI, Helsinki, Finland
3Institute for Atmospheric and Earth System Research INAR, University of Helsinki, Finland
4Ecology and Genetics Research Unit, University of Oulu, Oulu, Finland
5University of Alaska Anchorage, Anchorage, Alaska, USA
6University of the Arctic-UArctic, Rovaniemi, Finland
7Finnish Environment Institute SYKE, Helsinki, Finland
8Natural Resources Institute, Luke, Helsinki, Finland
9Department of Geological Sciences, University of Alaska Anchorage, USA
10University of Eastern Finland, Joensuu, Finland
11Structures and Construction Technology Research Unit, University of Oulu, Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 4.1 MB)
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Language: English
Published: John Wiley & Sons, 2021
Publish Date: 2021-11-15


Subarctic ecohydrological processes are changing rapidly, but detailed and integrated ecohydrological investigations are not as widespread as necessary. We introduce an integrated research catchment site (Pallas) for atmosphere, ecosystems, and ecohydrology studies in subarctic conditions in Finland that can be used for a new set of comparative catchment investigations. The Pallas site provides unique observational data and high-intensity field measurement datasets over long periods. The infrastructure for atmosphere- to landscape-scale research in ecosystem processes in a subarctic landscape has recently been complemented with detailed ecohydrological measurements. We identify three dominant processes in subarctic ecohydrology: (a) strong seasonality drives ecohydrological regimes, (b) limited dynamic storage causes rapid stream response to water inputs (snowmelt and intensive storms), and (c) hydrological state of the system regulates catchment-scale dissolved carbon dynamics and greenhouse (GHG) fluxes. Surface water and groundwater interactions play an important role in regulating catchment-scale carbon balances and ecosystem respiration within subarctic peatlands, particularly their spatial variability in the landscape. Based on our observations from Pallas, we highlight key research gaps in subarctic ecohydrology and propose several ways forward. We also demonstrate that the Pallas catchment meets the need for sustaining and pushing the boundaries of critical long-term integrated ecohydrological research in high-latitude environments.

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Series: Hydrological processes
ISSN: 0885-6087
ISSN-E: 1099-1085
ISSN-L: 0885-6087
Volume: 35
Issue: 9
Article number: e14350
DOI: 10.1002/hyp.14350
Type of Publication: A1 Journal article – refereed
Field of Science: 1172 Environmental sciences
1171 Geosciences
1181 Ecology, evolutionary biology
218 Environmental engineering
Funding: Academy of Finland, Grant/Award Numbers: projects 316349, 316014, 308511, 312559, 337523; K. H. Renlund foundation; Koneen Säätiö; Kvantum institute; Maa- ja vesitekniikan tuki ry; Strategic Research Council; UArctic Research Chairship.
Academy of Finland Grant Number: 316349
Detailed Information: 316349 (Academy of Finland Funding decision)
316014 (Academy of Finland Funding decision)
337523 (Academy of Finland Funding decision)
Copyright information: © 2021 The Authors. Hydrological Processes published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.