Siri Ofstad » Members

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Siri Ofstad

PhD candidate UiT The Arctic University of NorwayDepartment of Geology
Work address CAGE – Centre for Arctic Gas hydrate, Environment and climate Department of Geology UiT The Arctic University of Norway Tromsø 9037 Norway
Photo of Siri Ofstad

PhD project title:

Anthropogenic and Methane Induced Ocean Acidification in the Fram Strait-Barents Sea Region – Effects on Modern Planktic Foraminifera.

Phd project description:

Methane seepage may be a potential source of ocean acidification, due to the aerobic oxidation of methane in the water column, which produces carbon dioxide as a byproduct. This means that methane seepage has the potential to alter water column carbonate chemistry. The shell density and dissolution of planktic foraminifera are believed to be controlled by the concentration of  carbonate ions in the ambient seawater. Different methods have been used to evaluate the shell density of living planktic foraminifera and other calcifying organisms such as pteropods and benthic foraminifera. This project aims to investigate the carbonate chemistry and calcifying plankton at methane seepage sites.

Start date: Jan 2016
End date: Jan 2020


Tine L. Rasmussen (UiT, Tromsø, Norway)
Kasia Zamelczyk (UiT, Tromsø, Norway)