Calcium carbonate saturation in the surface water of the Arctic Ocean: undersaturation in freshwater influenced shelves Norwegian young sea ICE (N-ICE2015) expedition View project Strategic Initiative-The Arctic Ocean Ecosystem View project Calcium carbonate saturation in the surface water of the Arctic Ocean: undersaturation in freshwater influenced shelves

Abstract

In the summer of 2005, we sampled surface water and measured pH and total alkalinity (A T) underway aboard IB Oden along the Northwest Passage from Cape Farewell (South Greenland) to the Chukchi Sea. We investigated the variability of carbonate system parameters, fo-cusing particularly on carbonate concentration [CO 2− 3 ] and calcium carbonate saturation states, as related to freshwater addition, biological processes and physical upwelling. Measurements on A T , pH at 15 • C, salinity (S) and sea surface temperature (SST), were used to calculate total dissolved inorganic carbon (C T), [CO 2− 3 ] and the saturation of arag-onite (Ar) and calcite (Ca) in the surface water.