Stable oxygen and carbon isotopes from the planktonic foraminifera Neogloboquadrina pachyderma in the Western Arctic surface sediments:Implications for water mass distribution

作     者：XIAO Wenshen WANG Rujian CHENG Xinrong 

作者机构：State key laboratory of Marine Geology Tongji University Shanghai 200092 China 

出 版 物：《Advances in Polar Science》 (极地科学进展（英文版）)

年 卷 期：2011年第22卷第4期

页      面：205-214页

学科分类：070902[理学-地球化学] 070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 07[理学] 

基　　金：funded by the National Basic Research Program of China (Grant no. G2007CB815903) the National Natural Science Foundation of China (Grant nos.41030859 and 40321603) the China Program for International Polar Year 2007-2008 the China Geological Survey Project(Grant no. H01-14-04) part of the project"First Chinese National Arctic Research Expedition" and "Second Chinese National Arctic Research Expedition" supported by the Ministry of Finance of China and organized by the Chinese Arctic and Antarctic Administration (CAA),SOA 

主　　题：δ^18O δ^13C Neogloboquadrina pachyderma Western Arctic Ocean 

摘      要：Neogloboquadrina pachyderma is the most abundant planktonic foraminifera species found in the modern polar oceans. The δ^18O and δ^13C of N. pachyderma from the Western Arctic Ocean sediments were analyzed to reveal the implications of the proxies to environmental changes. The δ^18O from N. pachyderma in the Chukchi Sea reflect the water mass distribution in this area. Heavier δ^18O values were found along the Anadyr Current （AC） and lighter values in the central and eastern Chukchi Sea..These may reflect the freshwater signal from the Alaska Coastal Current （ACC） and Bering Sea Shelf Water （BSSW）. The light δ^18O signature in the high Arctic basin comes from the freshwater stored in the Arctic surface layer. The δ^18O distribution pattern in the Chukchi Sea is also influenced by the current system. High primary productivity along the AC results in heavy δ^18O. The relatively low primary productivity and the freshwater component from the BSSW and ACC may be the reason for this light δ^13C signal in the central and eastern Chukchi Sea. Our data reveal the importance of well ventilated Pacific Water through the Chukchi Sea into the Arctic Ocean.