| LI Zhongqiao,WANG Xinyi,JIN Haiyan,JI Zhongqiang,BAI Youcheng.Variations in organic carbon loading of surface sediments from the shelf to the slope of the Chukchi Sea, Arctic Ocean[J].Acta Oceanologica Sinica,2017,36(8):131-136 |
| 北冰洋楚科奇海陆架到陆坡表层沉积物有机碳载荷的变化 |
| Variations in organic carbon loading of surface sediments from the shelf to the slope of the Chukchi Sea, Arctic Ocean |
| 投稿时间：2016-03-30 |
| DOI：10.1007/s13131-017-1026-y |
| 中文关键词: 楚科奇海 北极 表层沉积物 有机碳载荷 碳循环 |
| 英文关键词:Chukchi Sea Arctic surface sediments organic carbon loading carbon cycle |
| 基金项目:The National Natural Science Foundation of China under contract Nos 41606211, 41276198, 41406217 and 41306200; the China Polar Environment Comprehensive Investigation and Assessment Programs under contract Nos Chinare-03-04 and Chinare-04-03; the National Science Foundation for Post-doctoral Scientists of China under contract No. 2016M591968; the Scientific Research Fund of Second Institute of Oceanography, SOA under contract No. JG1502. |
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| 中文摘要: |
| 沉积物单位表面积上吸附的有机碳被广泛用于示踪有机碳载荷的变化。本文研究了北冰洋典型边缘海——楚科奇海表层沉积物的有机碳载荷。研究发现陆架区沉积物的有机碳载荷高于陆坡区。相比于已报道的东西伯利亚海和马更些河，楚科奇海陆坡区沉积物的有机碳载荷也较低。这种有机碳载荷的变化可能和陆坡区的初级生产力较低，以及沉积物在传输过程中经历的氧化降解有关。沉积物的有机碳含量和比表面积呈线性相关，在有机碳轴上有正截距，表明一部分有机碳来自于岩石的贡献。此外，陆架区低有机碳载荷的沉积物含有的岩石有机碳更高。本研究的数据有助于深刻理解楚科奇海区域的碳循环问题。 |
| 英文摘要: |
| The content of organic carbon (OC) normalized to the specific surface area (SSA) of sediment is widely used to trace variations in OC loading (OC/SSA). This study presents observations of OC/SSA of surface sediments collected in the Chukchi Sea, a typical Arctic marginal sea. Shelf sediments exhibit much higher OC/SSA values than slope sediments in the study area. Compared with OC/SSA values reported from the East Siberian Shelf and Mackenzie River, the slope sediments possess lower OC loading. This abrupt decrease in OC/SSA is mostly related to the lower primary production on slope as well as possible oxidization processes. The results of linear regression analysis between OC and SSA indicate a sedimentary source rock for the OC in the Chukchi Sea sediments. Moreover, shelf sediments with low SSA possess a larger rock OC fraction than slope sediments do. The dataset of the present study enables a more thorough understanding of regional OC cycling in the Chukchi Sea. |
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