Carbon dynamics in the transition from ice-covered ocean to open waters in Young Sound, NE Greenland

The main goal of this research project is to predict the impact of climate change on the carbon sink in ice-covered Greenland fjord systems in Young Sound, and improve the understanding of how the biological productivity in the sea ice influenced season impact on the marine fjord ecology. During the campaign measurements of temperature, salinity, chlorophyll a concentration (Chl a), primary production and bacterial production, calcium carbonate concentration, Total alkalinity (TA), Total inorganic carbon (TCO2), oxygen concentration (O2), nutrients and bacterial and algal composition, abundance and diversity in sea ice column will be conducted in Young Sound fjord. Furthermore, in the underlying water column measurements of conductivity-temperature-density (CTD) cast will be conducted through a hole in the sea ice, and vertically distributed water samples will be collected for measurements of Chl a, primary production and bacterial production, Algal and bacterial composition, diversity and abundance. And also marine chemistry - TA, TCO2 to calculate the pCO2 dynamics, δ18O to track the freshwater input to the fjord, nutrients and O2 concentration. Once the sea ice has disappeared increased TA and low CO2 concentration are expected in the stratified surface water. Furthermore, sea ice break-up are expected to trigger pelagic spring bloom. Thus, measurements of CTD, Chl a, primary production and bacterial production, algal and bacterial composition, diversity and abundance, TA, TCO2 and δ18O will be collected every second day when the sea ice has disappeared.