Remineralization ratios of carbon, nutrients, and oxygen in the North Atlantic Ocean: A field databased assessment
Remineralization ratios of carbon, nutrients, and oxygen in the North Atlantic Ocean: A field databased assessment
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北大西洋碳、营养物和氧气的再矿化比率：现场数据库评估
DOI：
10.1029/2001gb001452
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发表时间：
2002
影响因子：
5.2
通讯作者：
H. Thomas
中科院分区：
文献类型：
--
作者：
H. Thomas
沿着 WOCE 1A/E 剖面评估了北大西洋的碳、营养物和氧的再矿化比率。该研究基于广泛的现场数据集，包括溶解无机碳 (DIC)、硝酸盐和亚硝酸盐 (NO3/2)、磷酸盐 (PO4) 和氧气 (O2) 数据以及水文数据。引入了一种程序，将 DIC 数据标准化为恒定的盐度和温度，并纠正人为二氧化碳的污染。归一化 DIC 值 (DICbio) 的剩余变异性可归因于有机物的再矿化。因此，DICbio 可以被视为表观氧利用率 (AOU) 的碳类比。再矿化率的连续评估获得了在密度水平 ρ = 1027.7 kg m−3 处分离的两种不同状态。在较浅的水平上，相对于颗粒有机物（POM）的雷德菲尔德比率，比率（C/N = 4.5；C/P = 67，AOU/C = 2.0；N:P = 15；AOU:P = 134；AOU/N = 9.0）向相对较高的养分释放和较高的耗氧量转变。相反，在更深层次上，比率转向相对较高的碳释放和较低的需氧量（C/N = 11；C/P = 152，AOU/C = 0.86；N:P = 13.9；AOU:P = 130；AOU/N = 9.4）。再矿化产物（DIC、NO3/2、PO4 和 AOU）的深度综合库存提供了调查区域的水柱平均比率（C/N = 8.8；C/P = 124，AOU/C = 1.1；N:P = 14.2；AOU:P = 131；AOU/N = 9.3），这意味着北大西洋生物碳泵的效率比预测的要高。关于 POM 的元素组成。
Remineralization ratios of carbon, nutrients, and oxygen have been assessed in the North Atlantic Ocean along the WOCE 1A/E section. The study is based on an extensive field data set comprising dissolved inorganic carbon (DIC), nitrate and nitrite (NO3/2), phosphate (PO4), and oxygen (O2) data as well as hydrographic data. A procedure has been introduced which normalizes DIC data to constant salinity and temperature and corrects for the contamination from anthropogenic CO2. The remaining variability on the normalized DIC values (DICbio) can be attributed to the remineralization of organic matter. DICbio can thus be seen as carbon‐analogy to the apparent oxygen utilization (AOU). The consecutive evaluation of the remineralization ratios obtains two different regimes separated at the density level ρ = 1027.7 kg m−3. In the shallower level the ratios (C/N = 4.5; C/P = 67, AOU/C = 2.0; N:P = 15; AOU:P = 134; AOU/N = 9.0) are shifted toward relatively higher nutrient release and higher oxygen consumption with respect to the Redfield ratios of particulate organic matter (POM). In contrast, in the deeper levels the ratios are shifted toward relatively higher carbon release and lower oxygen demand (C/N = 11; C/P = 152, AOU/C = 0.86; N:P = 13.9; AOU:P = 130; AOU/N = 9.4). The depth integrated inventories of the remineralization products (DIC, NO3/2, PO4, and AOU) provide water column averaged ratios for the investigation area (C/N = 8.8; C/P = 124, AOU/C = 1.1; N:P = 14.2; AOU:P = 131; AOU/N = 9.3) which imply a higher efficiency of the biological carbon pump in the North Atlantic Ocean than predicted with respect to the elemental composition of POM.