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Diagnostic simulations of the summer circulation in the Canadian arctic archipelago

Abstract Gridded fields of potential temperature and salinity, interpolated to the time of minimal ice coverage, are constructed for the Canadian Arctic Archipelago based on archived data. In order to overcome the large variations in the horizontal coverage of the observations, the gridding is performed in an iterative procedure where the horizontal correlation scales depend on the data coverage as well as on the flow field. The mean flow corresponding to the temperature and salinity fields are calculated with a diagnostic numerical ocean model. The simulations show that the relative flow through the different straits depends on the elevation difference from the Arctic Ocean to Baffin Bay, and on the density distribution and baroclinic pressure gradients. A 5‐cm increase in the Arctic‐Baffin elevation difference can double the transport. Mean values of the summer flow are a total transport of 0.9 Sv, with 34% flowing through Barrow Strait, 20% through Jones Sound, and 46% through Nares Strait.