极地研究Issue(1)：29-38,10.DOI:10.13679/j.jdyj.2014.1.029
白令海盆17 ka以来的古海洋与古气候记录
PALEOCEANOGRAPHIC AND PALEOCLIMATIC RECORDS IN THE BERING BASIN OVER THE LAST 17 KA
摘要
Abstract
Investigations of the terrigenous and biogenic fractions have been performed on core 08BR02,which was col-lected from the Bering Basin,North Pacific Ocean,during the third Chinese National Arctic Expedition.The depth-age model for this core is based on age control points from AMS 14 C dating of organic carbon and planktonic foraminifera,and correlation of the color b*in this core with the NGRIPδ18 O curve and color b*of four sediment cores in the North Pacific Ocean and the Bering Sea.The sea ice extension history in the Bering Basin over the last 17 ka is reconstructed from the ice-rafted detritus (IRD),the sand component and the sensitive grain size compo-nent (33-63 μm in size),which were carried by sea ice and icebergs,and increased during the H1 ,mid-B/A and YD periods.The IRD and the foraminiferal abundance in core 08BR02 increased simultaneously during the H1 ,mid-B/A and YD periods,indicating that input of meltwater enhanced the surface water nutrients,which then promoted blooms of planktonic foraminifera.The surface organic material that was deposited on the sea bottom pro-vided nutrients for benthic foraminifera.关键词
白令海盆/末次冰消期/冰筏碎屑/海冰扩张/有孔虫Key words
Bering Basin/last deglaciation/IRD (ice-rafted detritus)/sea ice extension/foraminifera引用本文复制引用
王磊,王汝建,陈志华,陈建芳,程振波,孙烨忱..白令海盆17 ka以来的古海洋与古气候记录[J].极地研究,2014,(1):29-38,10.基金项目
国家自然科学基金重点项目（41030859）、国家自然科学基金中俄合作与交流项目（41211120173）、南北极环境综合考察与评估专项（CHINARE2013-03-02，CHINARE2013-04-01）、国家海洋局极地考察办公室对外合作支持项目（IC201105）和中国地质调查局地质调查工作项目（水［2013］02-013-012）资助 （）
