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Spatial variation in grain-size population of surface sediments from northern Bering Sea and western Arctic Ocean: Implications for provenance and depositional mechanisms

引用

Advances in Polar Science 2020年第3期31卷 192-204页

作者： WANG Weiguo YANG Jichao ZHAO Mengwei DONG Linsen JIANG Min HUANG Erhui Third Institute of Oceanography Ministry of Natural Resources(MNR)Xiamen 361005China National Deep Sea Center Ministry of Natural Resources(MNR)Qingdao 266237China Pilot National Laboratory for Marine Science and Technology Qingdao 266237China First Institute of Oceanography Ministry of Natural Resources(MNR)Qingdao 266061China

In general,sediments in nature comprise populations of various *** information regarding the sources and depositional mechanisms of the populations can be obtained through their temporal and spatial *** this study,the grain size distribution of surface sediments from the Bering Sea and western Arctic Ocean were fitted and partitioned into populations using a log-normal distribution *** spatial variations in the populations indicate differences in their sources and deposition *** sediments on most of the Bering Sea Shelf originated from the Yukon River,and were transported westward by waves and ***,the presence of a coarser population outside Anadyr Bay was the result of Anadyr River ***,a northward transport trend of fine suspended particles was observed on the west side of the Bering Sea *** sediments in Hope Valley in the south Chukchi Sea also originated from the Yukon *** coarser population on the central Chukchi Sea Shelf originated from coast of Alaska to the east,not the Yukon River,and was transported by sea ice and bottom brine *** populations of sediments from the Chukchi Basin and the base of the Chukchi Sea Slope are the result of sea ice and eddy *** sediments from the western high Arctic Ocean predominantly comprised five populations,and two unique populations with mode diameters of 50–90μm and 200–400μm,respectively,were ubiquitous in the glacial and interglacial *** was difficult to distinguish whether these two populations originated from sea ice or ***,caution should be exercised when using either the>63μm or>250μm fractions in sediments as a proxy index for iceberg and ice sheet variation in the high Arctic Ocean.

关键词： Bering Sea western Arctic Ocean surface sediments grain-size population provenance depositional mechanisms

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