Arctic Ocean during the Last Glacial Maximum: Atlantic and polar domains of surface water mass distribution and ice cover
作者： Niels Nørgaard-Pedersen , Robert F. Spielhagen , Helmut Erlenkeuser , Pieter M. Grootes , Jan Heinemeier
DOI: 10.1029/2002PA000781
关键词: Antarctic sea ice 、 Ice sheet 、 Sea ice 、 Arctic ice pack 、 Oceanography 、 Thermohaline circulation 、 Arctic dipole anomaly 、 Geology 、 Arctic sea ice decline 、 North Atlantic Deep Water
摘要: On the basis of 52 sediment cores, analyzed and dated at high resolution, paleoceanography climate Last Glacial Maximum (LGM) were reconstructed in detail for Fram Strait eastern central Arctic Ocean. Sediment composition stable isotope data suggest three distinct paleoenvironments: (1) a productive region to along northern Barents Sea continental margin characterized by Atlantic Water advection, frequent open water conditions, occasional local meltwater supply iceberg calving from Ice Sheet; (2) an intermediate southwestern Eurasian Basin (up 84–85°N) western subsurface advection recirculation, moderately planktic productivity, perennial ice cover that breaks up only occasionally; (3) (north 85°N Basin) low-salinity surface layer thick strongly reduces bioproduction bulk sedimentation rates. Although total inflow into Ocean may have been reduced during LGM, its impact on coverage halocline structure was strong.
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