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Title [sv]
Icke-linjära mönster i inlandsvattnens roll som storskalig kolsänka - modellering och mekanismer
Title [en]
Understanding and modeling biome-scale nonlinearities in aquatic carbon burial
Abstract [sv]
Inland water ecosystems have been recently recognized as important components in the global carbon cycle. Large amounts of carbon are emitted as green house gasses (CO2 and CH4) or stored in sediments over geological time scales. The balance between carbon emission and sequestration determines eventually whether lakes act as sources or sink of carbon. Although there is mounting evidence on sequestration of organic carbon in inland waters, there is little understanding of differences in the aquatic carbon sink across major biomes. There is a strong potential that factors that control the pathways and turnover times that define the aquatic carbon sink and their interaction, cause non-linear dynamics relative to the differences in temperature and nutrient levels that are associated with future climate change or current differences between biomes. Based on novel measurements, meta-analysis and quantitative models, the proposed project is aimed at resolving the factors that govern the generation and burial of carbon across three major biomes: boreal, temperate, and tropical. To unravel the fate of sediment organic carbon across lakes, a reactive transport model will be implemented. Multiple techniques will be used to answer questions regarding the carbon source properties; partitioning and use, hydrological export of nutrients and organic matter. In this context, the state-of-the-art LM3VN dynamic global C model will be used to understand local mechanisms and regional drivers.
Principal InvestigatorGudasz, Cristian Gabriel
Coordinating organisation
Uppsala University
Funder
Period
2013-01-01 － 2015-12-31
National Category
Other Earth and Related Environmental Sciences
Identifiers
DiVA, id: project:4887Project, id: 2012-06650_VR

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