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首页 > 中国极地考察知识库 > 成果信息库 > 已审查 南极普里兹湾真光层下水体中有机碳和无机碳的分解比例的估算

南极普里兹湾真光层下水体中有机碳和无机碳的分解比例的估算

【标题】南极普里兹湾真光层下水体中有机碳和无机碳的分解比例的估算

【Title】Decomposition of Organic Carbon and Inorganic Carbon beneath Euphotic Zone in Prydz Bay, Antarctica

【作者】 韩正兵; 扈传昱; 薛斌; 潘建明; 余雯

【Author】

【期刊】极地研究

【Journal】

【期刊年份】2010

【卷】Vol. 22

【期】

【关键词】 再矿化效率

【Keywords】 remineralization efficiency

【摘要】本文利用中国第25次南极科学考察数据,运用数学模型对南极普里兹湾有机碳与无机碳的分解比及上层水体POC的再矿化效率进行了估算。结果表明:普里兹湾及其邻近海域POC的浓度范围为24.38~446.40μg?dm-3,平均值为118.16μg?dm-3。在普里兹湾P2断面陆架区,上层水体中的有机碳和无机碳向下层水体输出埋藏过程中,两者分解速率比为1.27(摩尔比),根据相关结果我们推测上层水体中的颗粒有机碳向底层输出埋藏的过程中有81%发生了转化重新参与海洋碳循环。

【Abstract】As the most important carbon pool in the ocean, particulate organic carbon (POC) plays an important role in marine carbon cycling. During the 25th Chinese National Antarctic Research Expedition (CHINARE-25), the decomposition ratio of organic carbon and inorganic carbon of Prydz Bay was calculated with a simple mathematical model. In the mean time, the re-mineralization efficiency of POC during sedimentation over the continental shelf of Prydz Bay was estimated according to the ratio of OC/N in the surface sediment. The results showed that the POC concentration of Prydz Bay ranged from 24.38 to 446.40μg?dm-3, with an average of 118.16μg?dm-3. Based on the observed data (dissolved inorganic carbon, dissolved O2 and nutrients), calculated remineralization ratios of elements were 164.1, 135.2 and 19.29 for O/P, C/P and N/P, respectively. At the P2 section on the continental shelf of Prydz Bay, the ratio of the decompositions of the organic carbon and inorganic carbon during their burial processes was 1.27 (mole ratio), and 81% of the POC in upper water was remineralized and re-involved in the marine carbon cycling, when it was buried to the seabed.

【基金/项目】 国家支撑计划重点项目 ; 国家海洋局青年海洋科学基金

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