New Publication in Global Change Biology: Light and nutrient control phytoplankton biomass responses to global change in northern lakes

New Publication in Global Change Biology: Light and nutrient control phytoplankton biomass responses to global change in northern lakes

Global environmental change affects the transportation of nutrients and organic matter to lakes. Researchers of the Climate Impacts Research Centre (CIRC) at Umeå University studied how the transporation of these substances into lakes influences phytoplankton, an organism found in aquatic ecosystems.

New Publication in Nature Communications: High Greenhouse gas emissions from Western Siberian lakes

New Publication in Nature Communications: High Greenhouse gas emissions from Western Siberian lakes

Permafrost soils store large quantities of frozen carbon which are important for the global climate. As permafrost thaws these soils warm up and release previously frozen carbon, as well as at the same time form new lakes.

Ett århundrade av arktiska klimatförändringar

Foto: Fährtenleser / Wikimedia Commons

Foto: Fährtenleser / Wikimedia Commons

Ett århundrade av arktiska klimatförändringar

Keith Larson från Abisko naturvetenskapliga forskningsstation berättar om vad som händer med klimatet här i norr

Globala klimatförändringar orsakade av oss människor utmanar stabiliteten i samhällen, ekonomier och nationer. På norra halvklotet, i den arktiska regionen, sker klimatförändringarna dubbelt så snabbt som det globala genomsnittet.

Den arktiska regionen fungerar som en del av jordens kylsystem och spelar en avgörande roll för att upprätthålla ekonomiskt och socialt välstånd. Att förstå klimatförändringar från ett arktiskt perspektiv är relevant för människor överallt.

Förekomsten av klimatförnekelse och den infekterade debatten i det offentliga samhället har lett till ett allvarligt missförstånd hos allmänheten om hur brådskande frågan är. Å andra sidan bör man inte bortse från att erkänna mångfalden av intressen och de fossila bränslenas bidrag till den snabba förbättringen för generationer av människor.

Att skapa motståndskraftiga samhällen och ekonomier i en snabb klimatförändring är en av vår generations största utmaningar.

Föreläsningen arrangeras i samarbete med Naturskyddsföreningen i Boden

Plats: Boden stadsbibliotek
Tim: 19:00 - 20:30

They are trying to understand the climate change at the #Arctic

They are trying to understand the climate change at the Arctic

Climate change is the strongest around the North and South poles. When the rest of the world gets a temperature increase of 1 degree, one can expect much greater changes in these areas. What happens at the poles doesn’t stay at the poles. Changes in the weather here will affect the entire planet. Meet the researchers who in different ways try to understand what is happening: Michael Tjernström, Stockholm University, Jan Karlsson, Umeå University and Sebastiaan Swart at the University of Gothenburg.

Research and Video produced and funded by the Knut and Alice Wallenbergs Foundation

The grass is always greener… Umeå University Research Blog

The grass is always greener…

As a researcher, you travel a lot. It’s usually a lot of fun, but… Umeå is so far from everything. It’s therefore no surprise that over 90% of the carbon dioxide emissions of Umeå University is caused by traveling employees. With a better world in mind, I therefore spend my last two days in a train, traveling from Umeå-Sundsval-Uppsala-Stockholm-Lund-Copenhagen-Hamburg-Ostnabruck-Hengelo-Zwolle-Leiden. From white to grey to brown to green and greener.

Welcoming our new postdoctoral researcher Niki Leblans

We welcome Niki Leblans, post doc working with Ellen Dorrepaal in Abisko.

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I am an ecologist and biochemist with a strong interest in northern ecosystems and their responses to climate change. I have been working on geothermally warmed ecosystems in Iceland, unraveling long-term warming effects on the ecosystem C and N cycle and on plant physiology. Now, I will be participating in the winter ecology project in Abisko. We will investigate the role of winter processes in plant and microbial carbon transformations and plant physiology and activity. We will put a special focus on responses to snow cover changes (an important factor of climate change at high latitudes). We plan to measure CO2 and CH4 emissions throughout an entire year to estimate the contribution of winter emissions to the annual carbon balance (and thus climate feedback) of tundra ecosystems. By applying an isotope-labelling technique we will further partition the respired carbon emissions into autotrophic and heterotrophic sources.

Welcoming our new postdoctoral researcher Josefine Walz

WE WELCOME JOSEFINE WALZ, POST DOC, WORKING WITH ELLEN DORREPAAL IN ABISKO

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I have a profound interest in landscape evolution and soil processes of the Earth’s cold regions. Previously, I worked on greenhouse gas production from degrading permafrost in Siberia. Most of this research took place in summer. In the current winter ecology project in Abisko, however, we will focus the role of winter processes in plant and microbial carbon transformations. We plan to measure CO2 and CH4 emissions throughout an entire year to estimate the contribution of winter emissions to the annual carbon exchange from tundra ecosystems. By applying an isotope-labelling technique we will further partition the respired carbon into autotrophic and heterotrophic sources. Additionally, ecophysiological parameters will be measured to investigate the temperature and light limitations to plant carbon uptake in winter. Overall, this project will give us a better insight into cold-season emissions and a better constrain of an often neglected climate-feedback.

PhD-position in arctic plant-soil-microbe interactions at CIRC in Abisko

Photo by Ive van Krunkelsven (C)

Photo by Ive van Krunkelsven (C)

A PhD-position in Ecology (4 years) is available in Abisko at the Climate Impacts Research Centre of the Department of Ecology and Environmental Science, Umeå University, north Sweden, to study the seasonal dynamics of plant-soil-microbe interactions in arctic ecosystems. Uptake of carbon by arctic plants is strongly limited by their access to nutrients, especially nitrogen, due to competition by microbes. Climate change can alter the interactions between plants and microbes, and can therefore alter nitrogen and carbon cycles in arctic ecosystems. In the Arctic, climate change is especially pronounced during autumn, winter and spring, but their impacts on plant-soil-microbe interactions remain unclear. We are looking for a PhD-student to investigate the seasonal dynamics of interactions for nitrogen between arctic plants and microbes, and how this changes with altered winter, spring and autumn climate.

Application Deadline: 2019-03-14

If you have questions regarding the position please contact Ellen Dorrepaal.

Threshold podcast "Impermafrost" with CIRC researcher Gesche Blume-Werry

Threshold podcast "Impermafrost" with CIRC researcher Gesche Blume-Werry

Ice is often beautiful. Even dramatic. We can photograph sea ice from space. We can hike up to—and onto—land ice, like glaciers and ice sheets. But permafrost, which is frozen soil, isn't so flashy or charismatic. It operates under the cover of darkness, below ground, hidden from view. In fact, there's permafrost in the photograph above, just a few feet below the hand of Dr. Gesche Blume-Werry, but you'd probably never know it.

Tidsmaskinen Abisko berättar om klimatförändringen

Hannah Rosenzweig är forskarstudent och har tagit prover på berget Nolia i Abisko. Foto: Simon Magnusson/SR

Hannah Rosenzweig är forskarstudent och har tagit prover på berget Nolia i Abisko. Foto: Simon Magnusson/SR

På två år har Abisko varit med om värmerekord och vädervariation som normalt ses över hundra års tid. Uppe på berget Noulja är förändringen tydlig i landskapets växtlighet.

Med hjälp av en studie som påbörjades 1917 ser man nu hur den arktiska miljön har förändrats av klimatet över hundra år.

I programmet hörs Keith Larson, evolutionär ekolog vid Umeå Universitet, och Hannah Rosenzweig, forskarstudent.


For more information about the project.

Greenhouse emissions from Siberian rivers peak as permafrost thaws

Greenhouse emissions from Siberian rivers peak as permafrost thaws

Permafrost soils store large quantities of frozen carbon and play an important role in regulating Earth’s climate. In a study published in Nature Geoscience, researchers from Umeå University, Sweden, in collaboration with an international team, now show that river greenhouse gas emissions rise high in areas where Siberian permafrost is actively thawing.

Autumn Research Symposium 2018 - Program

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12-14 September 2018

Lecture theatre, Abisko Scientific Research Station (ANS)

Wednesday 12 September

Start of symposium (chair: Karlsson)

17.00-17.15 Introduction, Jan Karlsson

17.15-17.30 The Scientific Advisory Group for Abisko Scientific Research Station (SAGA), Ulf Molau

17.30-18.00 The potential and constraints for greening of the High Arctic, Greg Henry

18.00-19.00 Welcome mixer (ANS dining room)

19.00- Dinner (ANS dining room)

Thursday 13 September

07.00-08.00 Breakfast (ANS dining room)

Session 1. Climate impact on Ecological dynamics (chair: Dorrepaal)

08.15-08.30 Species asynchrony globally stabilizes primary production against climate variability, Andrew MacDougall

08.30-08.45 The effect of snowmelt gradients on autumn senescence in tundra plants, Friederike Gehrmann

08.45-09.00 Long term effects of increased snow cover on tundra vegetation, Johan Olofsson

09.00-09.15 Fish production in northern lakes, Sven Norman

09.15-09.30 Biodiversity across 40 years in Northern Sweden, Per Stenberg

09.30-10.00 Coffee break (ANS dining room) and fresh air

Session 2. Human dimensions of environmental change (chair: Müller)

10.00-10.30 Socio-economic impacts of permafrost thaw in the coastal region of West Greenland: Working with local stakeholders to develop adaptation and mitigation strategies, Joan Nymand Larsen

10.30-10.45 Tourism and Climate Change, Cenk Demiroglu

10.45-11.00 Outdoor Human Environments: the changing face of climatic barriers to soft mobility and gathering in winter communities, David Chapman

11.00-11.15 Lake-water carbon and climate-human interactions, Richard Bindler

11.15-11.30 Arctic change and sustainability - the human dimension, Peter Sköld

11.30-12.00 Discussion

12.00-13.00 Lunch (ANS dining room)

Afternoon excursions

13:00-16:30 Excursion (outdoors)

Evening special session

17.00-17.30 New climate narratives: art and science collaboration to effect societal change, Olav Westphalen

17:30-18:00 Elevator talks: Bror Holmgren, Kira Ryhti, Sylvain Monteux, Megan Fork, Hendricus Verheijen, Karin Nilsson

18.00-19.00 Tundra bar (ANS dining room)

19.00- Dinner (ANS dining room)

Friday 14 September

07.00-08.00 Breakfast (ANS dining room)

Session 3. Climate impact on biogeochemical cycles (chair: Giesler)

08.15-08.45 Twenty years of species removal in moist acidic tussock tundra, Syndonia Bret-Harte

08.45-9.00 Using drones to study Arctic landscape variability of NDVI and carbon dynamics, Mattias Siewert

09.00-09.15 Hoping for the hump: Whole lake metabolism along an alpine DOC gradient, Marcus Klaus

09.15-09.30 Living soils in a future arctic: Investigating climate impacts on soil biota interactions & C-dynamics, Eva Krab

09.30-10.00 Discussion and end of symposium

10.00-10.30 Coffee break (ANS dining room)

10.30-11.00 Guided tour ANS (optional). Keith Larson


Participants

Agneta Larsson, Luleå University of technology, Sweden

Alberto Zannella, Umeå university, Sweden

Andrew MacDougall, University of Guelph, Canada

Bror Holmgren, Umeå university, Sweden

Carolina Olid, Umeå university, Sweden

Cecilia Vallin, Umeå university, Sweden

Cenk Demiroglu, Umeå university, Sweden

Cristian Gudasz, Umeå university, Sweden

David Chapman, Luleå University of technology, Sweden

Demian Hauptmann, Umeå university, Sweden

Dieter Müller, Umeå university, Sweden

Elin Lindén, Umeå university, Sweden

Ellen Dorrepaal, Umeå university, Sweden

Emily Pickering Pedersen, University of Copenhagen

Erik Lundin, Swedish Polar Research Secretariat

Eveline Krab, Swedish University of Agricultural Sciences

Friederike Gehrmann, University of Helsinki, Finland

Gabriella Nordin, Umeå university, Sweden

Greg Henry, Department of Geography, University of British Columbia, Canada

Hanna Blåhed, Umeå university, Sweden

Hendricus Verheijen, Umeå university, Sweden

Håkan Grudd, Swedish Polar Research Secretariat

Jan Karlsson, Umeå university, Sweden

Joan Nymand Larsen, Stefansson Arctic Institute, Akureyri, Iceland

Joanna Jonsson, Umeå university, Sweden

Johan Olofsson, Umeå university, Sweden

Jonas Gustafsson, Umeå university, Sweden

Justiina Dahl, Swedish Polar Research Secretariat

Karin Nilsson, Umeå university, Sweden

Keith Larson, Umeå university, Sweden

Kira Ryhti, University of Helsinki

Magnus Augner, Swedish Polar Research Secretariat

Marcus Klaus, Umeå university, Sweden

Marianne Nilsson, Umeå university, Sweden

Marie Kårebrand, Umeå university, Sweden

Mattias Siewert, Umeå university, Sweden

Megan Fork, Umeå university, Sweden

Mohammed Jawad Salih Ali, Umeå university, Sweden

Niklas Rakos, Swedish Polar Research Secretariat

Olav Westphalen, Hochschule für Künste Bremen

Per Stenberg, Umeå university, Sweden

Peter Sköld, Umeå university, Sweden

Pär Byström, Umeå university, Sweden

Richard Bindler, Umeå university, Sweden

Signe Lett, Copenhagen University, Denmark

Simon Magnusson, Swedish radio

Sven Norman, Umeå university, Sweden

Sylvain Monteux, Umeå university, Sweden

Syndonia Bret-Harte, Toolik Field Station, Institute of Arctic Biology, University of Alaska Fairbanks, USA

Ulf Molau, University of Gothenburg, Sweden

Two Postdoctoral Fellowships in Arctic ecosystems ecology / plant-ecophysiology / microbial ecology

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Two Postdoctoral Fellowships (2 years each) in Arctic ecosystems ecology / plant-ecophysiology / microbial ecology are available in Abisko at the Climate Impacts Research Centre of the Department of Ecology and Environmental Science, Umeå University, north Sweden, to study the off-seasonal dynamics of plant and soil microbial processes in arctic ecosystems. Climate change in the Arctic is especially pronounced during autumn, winter and spring, including increases in temperature, changes in snow fall/cover and rain-on-snow events. Such off-seasonal changes in climate can affect the carbon balance of arctic ecosystems and the underlying plant and soil microbial processes but the extent remains unclear. We are looking for two postdoctoral fellows to to investigate how changes in the timing, frequency and extent of winter freezing conditions, as well as the timing of spring and autumn, affects the (off-)seasonal dynamics of plant and microbial processes in arctic ecosystems.

Deadline: 28 September 2018

[Read More]

For more information, contact Dr Ellen Dorrepaal

INTERACT Transnational Access and Remote Access call now open

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New Transnational Access Call is Now Open
INTERACT Transnational Access and Remote Access call for s/s 2019 and a/w 2019-2020

Open at 2018-08-13 00:00:00 (Europe/Brussels) 
Close at 2018-10-12 23:59:59 (Europe/Brussels) 

The call is for INTERACT Transnational Access (TA) to 43 stations and Remote Access (RA) to 18 stations. Stations offering TA or RA are located across the Arctic and northern alpine and forest areas in Europe, Russia and North-America. The sites represent a variety of glacier, mountain, tundra, boreal forest, peatland and freshwater ecosystems, providing opportunities for researchers from natural sciences to human dimension. Note: applicants are not eligible for TA to their national infrastructures, i.e. stations that are located in the same country or operated by institutions located in the same country in which the applicant is working/residing. For example, scientists working in Finland are not eligible for TA to Finnish research stations, scientists working in UK are not eligible for TA to UK Arctic Research Station in Svalbard, scientists working in Denmark are not eligible for TA to research stations in Greenland, operated by Danish institutions, etc.