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Title [sv]
Klimates påverkan på källor och fällor för växthus gaser i sjöar på höga latituder
Title [en]
Climate impact on sources and sinks of greenhouse gases in high-latitude lakes
Abstract [en]
The aim of the projectis to assess climate impacts on C emission and burial in arctic ?subarctic lakes. Specific objectives include to assess 1. Temperature and precipitation control of fluxes. We will test hypothesis that climate has a major impact on the sources and rates of C emission and burial in lakes. 2. Ecosystem feedbacks and nonlinear dynamic. We will test the hypothesis that responses to climate change are highly nonlinear, including strong feedback mechanisms leading to regime shifts in the source-sink function of lakes. 3. Long vs. short term effects of climate change. We will test the hypothesis that effects of climate change are highly variable over time as a result of time lags between direct impacts and indirect effects mediated via changes in terrestrial surroundings. The core of the project is made up of (i) unique comparative studies of lakes across gradients in temperature and precipitation and (ii) the first large-scale experimental test of responses in C emission and burial to increases in temperature and precipitation/runoff. The studies will merge state-of-the-art concepts and tools in aquatic biogeochemistry by integrating physical, chemical, and biological processes and feedbacks and their variability in space (across lakes and between habitats) and time. We anticipate that this project will fundamentally advance the knowledge, understanding, and predictability of high latitude lake ecosystems.
Principal InvestigatorKarlsson, Jan
Coordinating organisation
Umeå University
2017-01-01 - 2020-12-31
National Category
Geosciences, Multidisciplinary
DiVA, id: project:1449Project, id: 2016-05275_VR

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