Accession Number : ADP007308

Title :   Tracing Upper Waters in the Arctic Ocean,

Corporate Author : BEDFORD INST OF OCEANOGRAPHY DARTMOUTH (NOVA SCOTIA)

Personal Author(s) : Jones, E. P. ; Anderson, Leif G.

Report Date : MAR 1992

Pagination or Media Count : 7

Abstract : We report results from the 1987 F.S. Polarstern cruise to the Nansen Basin that begin to address questions regarding how global climate change might affect the Arctic. Before the effects of global change can be assessed, the sources of upper waters must be determined and their circulation patterns mapped. In surface water, total carbonate concentrations distinguish between a northern fresh water component, whose origin is river runoff, and a southern freshwater component, whose origin is sea ice meltwater. Below the surface layer, the halocline in the Nansen Basin has the same unique nitrate-oxygen characteristic, NO, as the lower halocline in more central regions. The earlier speculation that this water forms in the Barents-Kara Sea region is confirmed. We hypothesize that some of this water must flow east and north from this region to central regions, eventually following the Polar branch of the Transpolar Drift and exiting through Fram Strait. Some can be traced in a general way flowing west directly to Fram Strait where the Polar and Siberian branches meet and flow into the Norwegian-Greenland Sea.

Descriptors :   *CLIMATE, *FRESH WATER, *OCEANS, *SURFACE WATERS, CARBONATES, CIRCULATION, DRIFT, FLOW, FRAM STRAIT, GLOBAL, GREENLAND SEA, ICE, KARA SEA, LAYERS, NITRATES, OXYGEN, RIVERS, RUNOFF, SEA ICE, STRAITS, GREENHOUSE EFFECT, ENVIRONMENTAL IMPACT.

Subject Categories : Atmospheric Physics
      Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE