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Paleoclimate and sediment biogeochemistry

General

Organisation
Project start
09.08.2013
Project end
19.08.2013
Type of project
Research
Project theme
Seabed history
Project topic
Climate research
Oceanography

Fieldwork / Study

Fieldwork country
Greenland (DK)
Fieldwork region
Greenland, Mid-West
Fieldwork location

Geolocation is 64.098625832412, -51.933746337891

Fieldwork start
09.08.2013
Fieldwork end
19.08.2013

Project details

24.09.2018
Science / project plan

The palaeoclimatic and palaeoceanographic variation and terrestrial flux will be studied in sediment cores taken from the Godthåbsfjord system and from the adjacent inner shelf. Up to 6-m long gravity cores will be taken in order to cover the Holocene time window, which will allow us to study changes in ocean circulation and surface-water conditions on multi-decadal to millennial time scales. Analyses will include sedimentology, inorganic geochemistry and micropalaeontological proxies, while age models will be established through 14C and 210Pbh datings.

In parallel cores, we will study the relationship between age and reactivity of buried organic carbon and study how the reactivity of organic matter controls the microbial abundance and cell specific activity. Specifically, we will analyze pore water chemistry and bulk sediment geochemistry, measure rates of organic carbon mineralization through sulfate reduction, analyze intermediates in the anaerobic mineralization such as volatile fatty acids and hydrogen, and quantify the microbial communities

Site: Sanna cruise, Godthåbsfjorden, Nuuk, Greenland

PI: Marit-Solveig Seidenkrantz and Hans Røy

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