Contents and distributions of organic carbon and total nitrogen in sediments of Prydz Bay, Antarctic

Liu Ruijuan; Yu Peisong; Hu Chuanyu; Han Zhengbing; Pan Jianming

doi:10.3969/j.issn.0253-4193.2014.04.003

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Liu Ruijuan, Yu Peisong, Hu Chuanyu, Han Zhengbing, Pan Jianming. Contents and distributions of organic carbon and total nitrogen in sediments of Prydz Bay, Antarctic[J]. Haiyang Xuebao, 2014, 36(4): 118-125. doi: 10.3969/j.issn.0253-4193.2014.04.003

Citation:

Liu Ruijuan, Yu Peisong, Hu Chuanyu, Han Zhengbing, Pan Jianming. Contents and distributions of organic carbon and total nitrogen in sediments of Prydz Bay, Antarctic[J]. Haiyang Xuebao, 2014, 36(4): 118-125. doi: 10.3969/j.issn.0253-4193.2014.04.003

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Contents and distributions of organic carbon and total nitrogen in sediments of Prydz Bay, Antarctic

doi: 10.3969/j.issn.0253-4193.2014.04.003

Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China

Received Date: 2013-02-23
Rev Recd Date: 2013-06-25

Abstract

Abstract

The organic carbon (OC), total nitrogen (TN) and OC/TN were analyzed in sediments from Prydz Bay (Antarctic) during the CHINARE-18/21/24/25/27 cruises. The results show that the contents of OC and TN were 0.14% to 1.20% and 0.02% to 0.20%, respectively, with averages of 0.63% and 0.11%. OC/TN ranges from 5.5 to 8.2 and 6.8 on average. The obvious positive correlation between OC and TN indicates that organic matters come from same source. OC/TN, approaching to 6.6, reveals the organism is mainly from marine biogenic matter. OC and TN show same distribution tendency and positive correlation with content of mud in sediments, and which both lower in the west of 73°E, but higher in the east, even with the highest value in the southeast of Prydz Bay. This pattern was controlled by primary production in upper water and terrigenous sand carried by glacier. The contents of OC and TN in surface sediments are higher than those in deep layers, and the former decreases with depth of core to a constant value. Higher sedimentation rates can accelerate carbon burial rate. The burial efficiency of OC ranges from 39% to 91%, averagely 66%, indicating Prydz Bay is an important carbon sink area.
- OC/TN,
- carbon burial,
- carbon cycle,
- biogeochemistry

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References(28)

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