During the 2013 field campaign in Nuuk, Greenland I was accompanied by two other colleagues from CEOS, Brent Else and Karley Campbell. Brent was working on the meteorological tower and under-sea-ice eddy correlation system, Karley was working on primary productivity and I was working on the carbon cycling. For all three of us, this involved sampling ice in a fjord. The target of my field was studying the sea ice carbon cycling (TA/DIC, pCO2) and the potential methane content into the ice and the seawater. Several times a day, I was setting up a chamber over the ice to measure CO2 fluxes. I was sampling both the sea ice and the water column. Once a week I was also sampling sediments for methane production on the sea floor. I got some interesting results on methane both the sea ice and the layer at the ice –water interface were super-saturated in methane. Indicating that, sea ice may act as source for atmospheric methane. Read more...