Nitrate anomaly in the upper nutricline in the northern South China Sea ‐ Evidence for nitrogen fixation
Nitrate anomaly in the upper nutricline in the northern South China Sea ‐ Evidence for nitrogen fixation
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DOI：
10.1029/2002gl015796
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发表时间：
2002-12
影响因子：
5.2
通讯作者：
G. Wong;Shi‐Wei Chung;F. Shiah;C. Chen;L. Wen;Kon‐Kee Liu
中科院分区：
文献类型：
--
作者：
G. Wong;Shi‐Wei Chung;F. Shiah;C. Chen;L. Wen;Kon‐Kee Liu
在中国南海（SCS）北方的东南亚时间序列研究（SEATS）站点，在营养上层发现了高达2 μM的硝酸盐异常N*。这些浓度是太平洋报告的较高值之一，表明固氮作用形成的富氮有机物的矿化对该地区的营养动态有重大贡献。在东北季风期间，秋季至早春的浓度系统性地高于夏季，最高可达2.5 μM，这表明前一时期固氮作用的影响更大。这一模式与亚洲沙尘向南海北方的大气沉降模式一致。的连贯性是一致的固氮和大气来源的铁的可用性之间的耦合。
Up to 2 μM of nitrate anomaly, N*, were found in the upper nutricline at the South East Asia Time‐series Study (SEATS) site in the northern South China Sea (SCS). These concentrations were among the higher values reported in the Pacific and indicate the significant contribution of the remineralization of nitrogen‐rich organic matter formed by nitrogen fixation to the nutrient dynamics of the area. The concentrations were systematically higher, by up to 2.5 μM, in the Fall through the early Spring, during the northeast monsoon, than in the Summer, suggesting that the impact of nitrogen fixation was higher during the former time period. This pattern is in phase with that of the atmospheric deposition of Asian dust to the northern SCS. The coherence is consistent with a coupling between nitrogen fixation and the availability of atmospherically derived iron.