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Search for projects with tag "isotopes"

Estimating GPP from stable isotopes and sapflux

PI: John Marshall

Working with Niles, Natalia, Jose, and Kersti, we have measured sapflux and the stable isotope composition of phloem sap around the tall tower at Svartberget. We will use these data to estimate GPP and compare these estimates to those from eddy flux and from Kersti's model. For precise work, this method requires knowledge of the isotopic composition of CO2 in the tree canopy. We aim to set up this measurement on the tall tower by attaching a Picarro CO2 isotope analyzer to the tower inlets.

GPPsap fluxisotopes

Forest ditch cleaning and its effect on mobilization of an old soil carbon store

PI: Marcus Wallin

To investigate the effects of ditch cleaning on mobilization of aged C we will combine state-of-the-art hydrochemical measurements with novel isotopic tools. Measurements of quantity and age composition of different C species will be made in ground and stream water of the different catchments.

14Cisotopesforest managementaquatic carbon export

WATERFACE: Environmental Forensics

PI: Simon Ponter

The WATERFACE project includes several sub-projects located all over northern Sweden. Data from this request will be used as a reference for meteoric water in an groundwater-tracing study outside Luleå.

Environmental forensincsisotopestrace elementstracing

Si isotopes in the boreal landscape

PI: Fredrik Lidman

Si is the second most common element in Earth's crust. Since most minerals in forest soils are silicates, the biogeochemistry of Si is crucial for weathering and the release of nutrients to forest ecosystems. This project studies the fractionation of Si isotopes in forests and mires.

siliconisotopesweathering

Sources of Fe in boreal mires

PI: Fredrik Lidman

Boreal mires are known to often export high amount of Fe, not seldom more than forests. The aim of this project is to identify where this Fe comes from using Fe isotopes.

ironmiresisotopes