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Variations in organic carbon loading of surface sediments from the shelf to the slope of the Chukchi Sea, Arctic Ocean

ISSN号：0253-505X
期刊名称：《海洋学报：英文版》
时间：0
分类：P736.41[天文地球—海洋地质;天文地球—海洋科学] P736.211[天文地球—海洋地质;天文地球—海洋科学]
作者机构：[1]Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China, [2]Laboratory of Marine Chemistry and Environment, Ocean College, Zhejiang University, Zhoushan 316021, China, [3]State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China
相关基金：Foundation item： 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.

作者： LI Zhongqiao[1], WANG Xinyi[2], JIN Haiyan[1,3], JI Zhongqiang[1], BAI Youcheng[1], CHEN Jianfang[1,3]

关键词：表层沉积物, 楚科奇海, 有机碳, 北冰洋, 负荷, 斜率, 货架, 线性回归分析, Chukchi Sea, Arctic, surface sediments, organic carbon loading, carbon cycle

中文摘要：

规范化为沉积的特定的表面区域(SSA ) 的器官的碳(OC ) 的内容广泛地被用来在装载的 OC (OC/SSA ) 跟踪变化。这研究介绍在 Chukchi 海收集的表面沉积的 OC/SSA 的观察，一个典型北极边缘的海。架沉积在学习区域比斜坡沉积展出高得多的 OC/SSA 价值。与价值从东方西伯利亚的架和 Mackenzie 河报导了的 OC/SSA 相比，斜坡沉积拥有装载的更低的 OC。在 OC/SSA 的这突然的减少主要与象可能的氧化过程一样的斜坡上的更低的主要生产有关。在 OC 和 SSA 之间的线性回归分析的结果在 Chukchi 海沉积为 OC 显示沉积来源岩石。而且，有低 SSA 的架沉积比斜坡沉积拥有更大的岩石 OC 部分。现在的学习的数据集启用在 Chukchi 海骑车的地区性的 OC 的更彻底的理解。

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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