Kulstofdynamik

Lorenz Meire in the laboratory. Photo: Thomas Juul-Pedersen
Photo: Lorenz Meire

This project aims to study the carbon dynamics in the Godthåbsfjord during a full annual cycle. With the projected changes like increased oceanic CO2 uptake, strong changes in the carbon dynamics and marine chemistry are expected. This is likely to have a fundamental impact on many ecosystem processes as well.

Recent studies indicate that Arctic fjord systems are a strong sink for CO2 but the driving factors for this uptake and implication on water chemistry (e.g. pH) are still unknown. This project aims to understand the role of different processes in carbon dynamics in a subarctic fjordsystems affected by glacial input. By studying the spatial and temporal variation in chemical and biological variables, the role of the different drivers can be quantified.

During different campaigns, water chemistry is studied from glacier to open ocean. From the collected water, DIC, pH, alkalinity and pCO2 are quantified to study the inorganic carbon dynamics. Nutrients (NH4, NOx, PO4, DSi, biogenic Si), chlorophyll, oxygen, suspended matter, particulate and dissolved organic carbon and the oxygen isotope ratio (indication on fraction glacial melt) will be determined. 

Opdateret 20.05.2014