Henry Holmstrand

Researcher
Room: R507
Phone: +46 (0)73 696 1037
Henry.Holmstrand@aces.su.se

About me

I work mainly with compound-specific isotope analysis (CSIA), both as a member/PI in research projects and also as the manager of the faculty funded Delta Facility.

The Delta Facility has a mission to promote and develop CSIA at Stockholm University. So far, we have established a wide range of methods for dD, d13C, d15N, d37Cl and d81Br in our laboratories and also together with the laboratories of the Swedish Museum of Natural History (the Lab. for Isotope Geology). Please read more at the Delta Facility homepage (http://delta.geo.su.se).

Our team is recognized for CSIA of halogen isotopes, e.g. d37Cl in chlorinated solvents and pesticides, and d81Br in flame retardants and ozone-depleting gases. While some work of this nature is still ongoing (in collaboration with LTH and consultancy companies), we are opening up new research areas for CSIA. A new and exciting development is to work with aerosol samples for characterization of processes that affect the aerosol components during long-range transport (so called “ageing” of aerosols). We will do this by targeting both specific combustion products, but also by looking at more general aerosol components such as sulfur species.

Currently, I am also involved in the analysis and interpretation of methane samples that were collected from the East Siberian Arctic Shelf during the SWERUS-C3 icebreaker ODEN expedition in 2014. We hope to resolve the contributions from the different geological CH4 reservoirs to overlying seawater – and ultimately the atmosphere – by triple isotope measurements (dD, d13C and radiocarbon) for source apportionment.

Biogeochemistry

How human activities affect natural processes that drive the major biogeochemical cycles that ultimately govern the composition of the environment.