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Project type/Form of grant
Grant for employment or scholarship
Title [sv]
Långsiktiga processer bakom den pågående ökningen av kolhalten i nordliga sjöar: en tillbakablick för att förutsäga framtiden
Title [en]
Quantifying long-term mechanisms behind the ongoing increase in lake-water carbon in northern lakes: a look back to predict future levels
Abstract [en]
Monitoring data show organic carbon (OC) concentrations are increasing in lakes and rivers across Europe and N America, which will affect drinking water quality, aquatic ecosystems, and C cycling. Knowledge beyond the few decades covered by monitoring is key to determine the currently unknown contribution to this increase of different co-acting drivers (climate, acidification, land use). In this project I will use lake sediments, which archive information on past lake conditions, to quantify past changes in lake-water OC and also in its quality, which underlie the ongoing OC trend. The project integrates i) my expertise in infrared spectroscopy to reconstruct OC and other sediment components, ii) the host?s expertise in using paleoenvironmental data to assess the effects of aquatic and terrestrial ecosystem changes, and iii) the co-host?s analytical experience in organic geochemistry. Three analytical work packages will be conducted at the host: 1) Expand existing VNIR models for reconstructing lake-water OC (boreal to arctic lakes) to include temperate lakes. 2) Utilize land-use and acid deposition gradients in NE America to disentangle the individual contribution of these anthropogenic factors to past and ongoing OC changes. And 3) identify qualitative changes in C that accompany the observed OC increase in lakes. During the final year in Umeå results from NE America and N Europe will be synthesized to provide new, fundamental insights into long-term C cycling in lakes.
Principal InvestigatorMeyer-Jacob, Carsten
Coordinating organisation
Umeå University
2016-07-01 - 2019-06-30
National Category
Geosciences, MultidisciplinaryGeochemistry
DiVA, id: project:1471Project, id: 2016-00573_VR

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