登录 | 注册 | 中文  | English  | 用时: 0.55s
元数据
高级检索
首页 > 中国极地考察知识库 > 成果信息库 > 已审查 Stable oxygen and carbon isotopes from the planktonic foraminifera Neogloboquadrina pachyderma in the western Arctic surface sediments: implications for water mass distribution

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

【标题】Stable oxygen and carbon isotopes from the planktonic foraminifera Neogloboquadrina pachyderma in the western Arctic surface sediments: implications for water mass distribution

【Title】Stable oxygen and carbon isotopes from the planktonic foraminifera Neogloboquadrina pachyderma in the western Arctic surface sediments: implications for water mass distribution

【作者】 肖文申; 王汝建; 成鑫荣

【Author】

【期刊】极地研究

【Journal】

【期刊年份】2011

【卷】22

【期】

【关键词】 δ18O; δ13C; Neogloboquadrina pachyderma; Western Arctic Ocean

【Keywords】 δ18O; δ13C; Neogloboquadrina pachyderma; Western Arctic Ocean

【摘要】Neogloboquadrina pachyderma (sin.) (Nps) is the most abundant planktonic foraminifera species in the polar oceans. The δ18O and δ13C of Nps from the western Arctic Ocean sediments were analyzed to reveal the implications of the proxies to environmental changes. The δ18O records of Nps in the Chukchi Sea reflect the water mass distribution in this area. Heavy δ18O values are along the Anadyr Current (AC) and light values in the central and eastern Chukchi Sea may reflect the freshwater signal in the Alaska Coastal Current (ACC) and Bering Sea Shelf Water (BSSW). Light δ18O signature in the high Arctic basin comes from the freshwater stored in the Arctic surface layer. The δ13C distribution pattern in the Chukchi Sea is also influenced by the current system. High primary productivity along the AC results in heavy δ13C; relatively lower primary productivity and the freshwater component in the BSSW and ACC may be the reason for the light δ13C in the central and eastern Chukchi Sea. Our data reveal the importance of well ventilated Pacific Water through Chukchi Sea into the Arctic Ocean.

【Abstract】Neogloboquadrina pachyderma (sin.) (Nps) is the most abundant planktonic foraminifera species in the polar oceans. The δ18O and δ13C of Nps from the western Arctic Ocean sediments were analyzed to reveal the implications of the proxies to environmental changes. The δ18O records of Nps in the Chukchi Sea reflect the water mass distribution in this area. Heavy δ18O values are along the Anadyr Current (AC) and light values in the central and eastern Chukchi Sea may reflect the freshwater signal in the Alaska Coastal Current (ACC) and Bering Sea Shelf Water (BSSW). Light δ18O signature in the high Arctic basin comes from the freshwater stored in the Arctic surface layer. The δ13C distribution pattern in the Chukchi Sea is also influenced by the current system. High primary productivity along the AC results in heavy δ13C; relatively lower primary productivity and the freshwater component in the BSSW and ACC may be the reason for the light δ13C in the central and eastern Chukchi Sea. Our data reveal the importance of well ventilated Pacific Water through Chukchi Sea into the Arctic Ocean.

【基金/项目】 国家基础研究规划项目“气候演变的热带驱动与碳循环周期性” ; 国家自然科学基金重点项目 ; 中国国际极地年项目(2007-2009) ; 中国气候变化地质记录对全球气候变化重要事件响应

【下载】 PDF(1.9 MB)