MOSAiC – Seasonal Carbon Uptake

The Role of Sea Ice on the Seasonal Carbon Uptake by the Polar Ocean

Who is in our team?

Dr Dorothee Bakker (PI) (Centre of Ocean and Atmospheric Sciences, School of Environmental Sciences, University of East Anglia, United Kingdom)

Dr Dorothee Bakker. Photo credit: Alina Marca

Elise Droste, PhD student (Centre of Ocean and Atmospheric Sciences, School of Environmental Sciences, University of East Anglia, United Kingdom)

Elise Droste, who will be joining MOSAiC on leg 6, at the edge of the Antarctic ice shelf (photo by Rebecca Gorniak, Marlene Meister, and Sunke Trace-Kleeberg).

International collaborators

Dr Mario Hoppema (Alfred Wegener Institute, Germany)

Dr Allison Fong (Alfred Wegener Institute, Germany)

Prof Are Olsen (Geophysical Institute, University of Bergen, Norway)

Dr Adam Ulfsbo (Department of Marine Sciences, University of Gothenburg, Sweden)

Dr Agneta Fransson (Norwegian Polar Institute, Norway)

Dr Melissa Chierici (Institute of Marine Research, The University Centre in Svalbard, Norway)

Dr Bruno Delille (Chemical Oceanography Unit, University of Liège, Belgium)

Dr Daiki Nomura (Faculty of Fisheries Science, Hokkaido University, Japan)

Dr Sinhué Torres-Valdes (Alfred Wegener Institute, Germany)

Dr Clara Hoppe (Alfred Wegener Institute, Germany)

What are the questions asked in the framework of the MOSAiC project?

 While the polar oceans play an important role in the global carbon cycle by transporting carbon to the deep ocean, knowledge of the current and future state of the polar ocean carbon sink is plagued by uncertainties in the role that sea ice has on these processes.

Specifically we will address the following questions:

  • What are the seasonal changes in sea water carbon content and their drivers?
  • How do these changes affect sea-air CO2 flux and carbon transport to the deep ocean?
  • How do seasonal processes affecting carbon content and fluxes in the perennially ice covered Arctic Ocean differ from those in the seasonally ice covered Southern Ocean?

In MOSAiC we will be contributing to the collection and analysis of dissolved inorganic carbon and total alkalinity samples of sea water and sea ice. These data are crucial in understanding the carbon cycle within the Arctic Ocean. Insights from our work on the seasonal processes affecting carbon content and fluxes in the Southern Ocean will complement our work in MOSAiC.

CTD rosette coming out of the Weddell Sea from the side of R.V. Polarstern (photo by Elise Droste).

When will the team be on the ship?

Measurements will be taken throughout the length of the expedition. Elise Droste will be on R.V. Polarstern for the duration of leg 6.

How are we getting onto the ship?

Elise is getting to Polarstern with the Chinese Xue Long III icebreaker.

What else have you worked on?

 Dorothee Bakker has conducted research on marine biogeochemistry, specifically on the processes driving air-sea exchange of climate-active gases and the carbon cycle in the Atlantic and Southern Oceans. She has participated in over 21 multidisciplinary projects, most of which were seagoing. Currently she is the chair of the Surface Ocean CO2 Atlas (SOCAT) and is participating in the CUSTARD, PICCOLO, RINGO, and COMFORT research projects.

Elise Droste has worked on iodine chemistry in marine aerosols, emissions and trends of long-lived greenhouse gases in the troposphere, and stratospheric chemistry, after which she started PhD research on the role of sea ice in the carbon sink of polar oceans. Elise has experience in the deployment of Biogeochemical Argo floats in the Southern Ocean and carbonate chemistry analyses.

E-mail address of PI

Desert of ice on the Weddell Sea in the boreal summer (photo by Elise Droste).