| Summary: | The oceanographic regime of Lancaster Sound displays characteristics of two distinct water masses. The upper layer is physically similar to that encountered in the Arctic Ocean and is typical of conditions recorded in M'Clure Strait and on the Arctic continental shelf. Below the depth of 200 metres, water characteristics are identical to those observed in Baffin Bay. Baffin Bay water intrudes into Lancaster Sound and is defined as far west as Prince Regent Inlet. Analyses, using two T-S techniques, are carried out to show that water of Baffin Bay characteristics occurs at all sampling positions below 250 metres in the eastern end of the Parry Channel and the equivalent thickness of this influx is of the order of 200-400 metres.
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