Hannu Marttila

The University of Oulu, a leading multidisciplinary research institution in Finland, is seeking a Postdoctoral Researcher for a project focused on extreme climate events, hydrology, and carbon cycling in northern environments. This position is based within the Water, Energy and Environmental Engineering research unit at the Faculty of Technology, which specializes in land, water, and energy systems and their interactions. The research is motivated by pressing societal challenges such as climate change, environmental degradation, and energy transition, aiming to develop sustainable solutions for the future. The project investigates how extreme climatic events—including heatwaves, droughts, winter warming episodes, and rain-on-snow events—impact hydrology and carbon cycling in high-latitude northern ecosystems. These events are becoming more frequent and widespread across the Arctic, triggering rapid ecological responses that often exceed the effects of gradual, long-term warming. The research integrates detailed site-level observations with large-scale data synthesis to understand how short-term climatic extremes alter water flow, soil conditions, vegetation dynamics, and ecosystem carbon fluxes. As a postdoctoral researcher, you will work with extensive datasets from multiple Arctic and sub-Arctic research sites, complemented by large climate, hydrology, and ecological databases. Your main tasks will include data mining, harmonizing, and analyzing diverse data sources to identify how specific extreme climatic events affect water flow, soil conditions, vegetation dynamics, and carbon fluxes. The research also explores vertical exchanges between ecosystems and the atmosphere, as well as lateral transport of carbon through hydrological pathways. You will contribute to developing an integrated, multi-site understanding of the Net Ecosystem Carbon Balance (NECB) at both catchment and regional scales. Key responsibilities include compiling and managing datasets from long-term monitoring sites, extracting and calculating indicators of extreme events from reanalysis products, analyzing carbon cycling and hydrological responses before, during, and after extreme events, contributing to multi-site synthesis to understand regional patterns and drivers, and publishing findings in international peer-reviewed journals. The position offers opportunities for professional development within a strong research unit, regular salary paid 12 months per year, paid leave, holiday bonus, wellness benefits, and support for settling into Oulu through the Buddy Programme and Spouse Network. Applicants must hold a doctoral degree in data science, geoscience, biogeochemistry, environmental science, ecology, engineering, or equivalent experience, completed no more than 10 years ago and by the application deadline. Essential skills include handling large observational and/or modelling datasets, statistical data analysis, independent scientific work, teaching skills, strong English language skills, and a proven track record in scientific writing and publishing. Preferred qualifications include experience with machine and deep learning data analysis, field work campaigns, student supervision, and applying for external funding. The fixed-term position is for 36 months, starting June 2026, with a typical monthly salary of 3800-4000 € (before taxes), based on Finnish university salary charts and personal work performance. The application deadline is 16 March 2026. To apply, submit your application online in English, including a cover letter, CV, list of publications, brief account of research merits, and contact details for 2–3 referees. Eligible applicants will be invited to a remote interview, and all applicants will be notified after the selection process. For further information, contact Professor Torben R. Christensen ([email protected]) or Associate Professor Hannu Marttila ([email protected]). For more details and to apply, visit the University of Oulu application portal.

The University of Oulu, a leading multidisciplinary research university in Finland, is offering a 3-year fixed-term Doctoral Researcher position in Arctic-alpine hydrology and ecology. The position is based in the Faculty of Technology, Water, Energy and Environmental Engineering Unit, and is linked to the 'Global trends and ecology of late-lying snowbeds' project funded by the Research Council of Finland. The project is led by Assistant Professor Pekka Niittynen and involves collaboration with Associate Professor Hannu Marttila. The doctoral research will focus on understanding how changing hydrological and snow conditions in Arctic and alpine environments impact the ecology of cold-adapted species and ecosystem processes in tundra and high-mountain regions. The research theme is flexible and can be tailored to the candidate’s interests and skills. Responsibilities include fieldwork in northern Finland, Sweden, and Norway, particularly at the Kilpisjärvi research station, monitoring plant communities, mapping soil properties, maintaining microclimate logger networks, and collecting and analyzing plant, soil, and tree-ring data. The project also integrates satellite and drone remote sensing data into ecological models and involves collaboration with a global network of microclimate researchers. The Water, Energy and Environmental Engineering research unit hosts four research groups specializing in hydrological modeling, cold climate hydrology, hydrological process studies, and groundwater research. The successful candidate will join a multidisciplinary team of hydrologists, geographers, ecologists, and data scientists. The position offers access to unique global infrastructure and datasets, opportunities for professional development, and a supportive work environment. There is also budget for a 1–2 month research visit to the University of Lausanne, Switzerland, to collaborate with key project partners. Applicants must hold a relevant master’s degree in biology, ecology, physical geography, hydrology, soil science, environmental science, or a related field, completed before the start of the position. An initial research plan is required. Candidates should demonstrate motivation for doctoral studies, basic understanding of statistical data analysis, programming skills (R, Python, or Julia), fluency in English, and the ability to work independently and in a multidisciplinary team. Experience with remote sensing, drone imagery, plant identification, and soil analysis is appreciated. Applicants must apply for the right to study for a doctoral degree at the University of Oulu Graduate School (UniOGS) at the beginning of employment. The position is full-time, starting on June 1, 2026, with a 6-month trial period. The starting gross salary is approximately 2700–2900 € per month (before taxes), with progression based on performance. The University of Oulu offers wellness benefits, career development opportunities, and support for international staff and their families. Finland is renowned for its high quality of life, safety, and excellent education system. To apply, submit your application online by May 3, 2026, including a cover letter, CV, and initial research plan. Eligible applicants may be invited to an interview. For further information, contact Assistant Professor Pekka Niittynen ([email protected]) or Associate Professor Hannu Marttila ([email protected]).

The University of Oulu, a leading multidisciplinary research institution in Finland, is offering a 3-year fixed-term postdoctoral position in remote sensing and hydrological/snow modelling. The role is based in the Faculty of Technology, Water, Energy and Environmental Engineering Unit, and is closely linked to the Flagship DIWA - Digital Waters and SAFIRE - Safeguarding Biodiversity through Interdisciplinary Research on Habitat Restoration, both funded by the Research Council Finland. The SAFIRE programme focuses on actionable knowledge for habitat restoration, especially in Arctic regions. The successful candidate will join a vibrant water research team comprising four research groups specializing in hydrological modelling, cold climate hydrology, hydrological process studies, and groundwater research. The research will leverage unique infrastructure at research stations and supersites in Finland, and is part of the Arctic, Antarctic and Mountain initiative, a global network of ~150 researchers working on microclimate datasets and promoting interdisciplinary microclimate research. Responsibilities include developing algorithms for fine-scale snow and hydrological mapping and modelling using satellite data (Landsat, Sentinel, PlanetScope), integrating satellite observations with climate reanalysis (ERA5-Land) and microclimate data to reconstruct historical trends, and collaborating with ecologists and hydrologists to assess impacts on ecosystems and water resources. The postdoc will also contribute to open-source tools, publish high-quality research, and participate in doctoral supervision and education. Fieldwork in northern Finland, Sweden, and Norway is possible depending on interest. The University of Oulu offers a supportive environment with professional development opportunities, access to global research infrastructure, wellness benefits (ePassi), and programmes to help new staff and their families settle in Oulu. The institution holds the HR Excellence in Research label from the European Commission, recognizing its commitment to researchers’ working conditions and careers. Finland is renowned for its high quality of life, safety, education system, and competitive economy. Applicants must hold a relevant doctoral degree (remote sensing, hydrology, data sciences, environmental science, ecosystem modelling, or related field) completed within the last 10 years. Essential skills include independent scientific research, teaching, numerical modelling, data analysis, programming (Python, R, Julia, Fortran, C/C++), excellent English, teamwork, and scientific writing. Preferred qualifications include experience with satellite remote sensing, drone imagery, ecological restoration, high-performance computing, doctoral supervision, international networking, and proposal writing. Selection criteria emphasize scientific excellence, international activity, supervision experience, pedagogical competence, societal relevance, and academic service. The position starts on June 1, 2026 (or as soon as possible thereafter) and includes a 6-month trial period. Salary ranges from 3700 to 4800 € per month (before taxes), based on qualifications and experience, with additional performance-based components. Apply online by May 3, 2026, submitting a motivation letter, academic CV, publication list, and teaching/supervision experience. Eligible candidates may be invited to an interview. Contact Assistant Professor Pekka Niittynen ([email protected]) or Associate Professor Hannu Marttila ([email protected]) for further information.