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Deciphering the role of sea-ice microorganisms on cloud processes in the Arctic

General

Organisation
Project start
01.06.2019
Project end
30.05.2021
Type of project
Research
Project theme
Weather, climate & atmosphere
Project topic
Atmosphere - ice coupling
Atmosphere - ocean coupling
Atmospheric science
Cryosphere
Ecology
Ecosystems, aquatic
Ice - ocean coupling
Meteorlogy
Microbiology
Phytoplankton
Sea ice

Fieldwork / Study

Fieldwork country
Greenland (DK)
Fieldwork region
Greenland, North-East
Fieldwork location

Geolocation is 81.631262253125, -16.80149114714

Fieldwork start
01.08.2020
Fieldwork end
31.08.2020

Project details

16.03.2020
Science / project plan

To study the transfer of microorganisms from sea ice via sea water to the atmosphere in situ, we will collect samples of air, sea-ice and seawater at the Villum research station. The field study relies on the station’s infrastructure that provides unprecedented access for studying effects of multiannual and new sea-ice melt on cloud processes. The biogenic
fraction of ice nucleating particles will be quantified using droplet freezing assays in ice, water and air. Community profiling will be performed using state-of-the-art Miseq amplicon sequencing targeting 16S rRNA (bacterial communities) and 18S rRNA genes (eukaryotic communities) to pinpoint taxa with a potential to affect cloud processes. Finally, immunofluorescence will be used targeting IN proteins in combination with fluorescence activated cell sorting and transmission electron microscopy for advance morphological identification of specific IN biogenic particles in sea ice. Complementary laboratory experiments will be performed using the sea-spray simulation setup to quantify emissions of IN bioaerosols from natural seawater and from mixtures of natural seawater with sea-ice melt.

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