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西北冰洋表层沉积物中生源和陆源粗组分及其沉积环境
引用本文:孙烨忱,王汝建,肖文申,陈建芳,程振波,陈志华,高爱国,李洪亮.西北冰洋表层沉积物中生源和陆源粗组分及其沉积环境[J].海洋学报,2011,33(2):103-114.
作者姓名:孙烨忱  王汝建  肖文申  陈建芳  程振波  陈志华  高爱国  李洪亮
作者单位:1.同济大学海洋地质国家重点实验室,上海 200092
基金项目:国家重点基础研究发展规划项目(G2007CB815903);国家自然科学基金重点项目(41030859);中国第3次北极科学考察以及国际极地年中国行动计划资助项目;中国地质调查局项目(水[2010]矿评03-06-04)。
摘    要:通过中国第1至第3次北极科学考察在北冰洋西部所采集的99个表层沉积物中生源与陆源粗组分的分析,研究了该海域表层生产力的变化,有机质来源以及陆源粗颗粒物质的输入方式和影响因素.研究区域生源组分所反映的表层生产力变化与通过白令海峡进入楚科奇海的3股太平洋洋流密切相关.楚科奇海西侧高盐高营养盐的阿纳德尔流流经区域,表层生产力...

关 键 词:表层沉积物  生源与陆源粗组分  表层生产力与冰筏碎屑  沉积环境  北冰洋西部
收稿时间:7/8/2010 12:00:00 AM

Biogenic and terrigenous coarse fractions in surface sediments of the western Arctic Ocean and their sedimentary environments
SUN Ye-chen,WANG Ru-jian,XIAO Wen-shen,CHEN Jian-fang,CHENG Zhen-bo,CHEN Zhi-hu,GAO Ai-guo and LI Hong-liang.Biogenic and terrigenous coarse fractions in surface sediments of the western Arctic Ocean and their sedimentary environments[J].Acta Oceanologica Sinica (in Chinese),2011,33(2):103-114.
Authors:SUN Ye-chen  WANG Ru-jian  XIAO Wen-shen  CHEN Jian-fang  CHENG Zhen-bo  CHEN Zhi-hu  GAO Ai-guo and LI Hong-liang
Institution:1.State key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China2.Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, 27517, Germany3.Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China4.First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China5.Department of Oceanography, Xiamen University, Xiamen 361005, China
Abstract:Biogenic and terrigenous coarse fractions in the surface sediments from the western Arctic Ocean, which were collected in the First, the Second and the Third Chinese National Arctic Expeditions, were measured by different means in this paper, revealing the surface productivity changes, source of organic matter and input patterns of terrigenous coarse matters in the study area. The surface productivity indicated by the biogenic sediments in the area is closely related to the three Pacific Ocean currents entering into the Chukchi Sea through Bering Strait. High surface productivity in the western Chukchi Sea is resulted from the hyperhaline and hypertrophic Anadyr Stream, whereas low planktonic siliceous productivity in its eastern part is caused by the hypohaline and hypotrophic Alaska Coastal Stream.High planktonic calcareous productivity in the Chukchi Sea Plateau and Alpha Ridge is ascribed to the impact of the northern Atlantic water mass. Low planktonic calcareous productivity in the Chukchi Sea shelf is attributed to the terrigenous matter dilution and life depth of calcareous microorganism. Low calcareous planktonic productivity in the Canada Basin is responded to the strong CaCO3 dissolution. Distribution of terrigenous coarse fraction (ice-rafted detritus-IRD) in the western Arctic Ocean is influenced mainly by sea ice and iceberg transport, terrestrial ice input, river and Pacific currents. The terrigenous coarse fraction in the Bering Strait is impacted by the Pacific currents entering into the Chukchi Sea through Bering Strait. The terrigenous coarse fraction near Alaska coastal area is transported by the terrestrial ice and river. The high IRD in the Northwind Ridge is contributed by the massive sea ice and icebergs conveyed by the Beaufort Circulation, and deposited at the seafloor when the sea ice and icebergs melt.
Keywords:surface sediments  biogenic and terrigenous coarse fractions  surface productivity and ice-rafted detritus  sedimentary environment  western Arctic Ocean
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