Uncertainties in dissolved organic carbon load estimation in a small stream
Uncertainties in dissolved organic carbon load estimation in a small stream
复制标题
小溪流中溶解有机碳负荷估算的不确定性
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
J. Tittel
中科院分区：
文献类型：
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作者：
O. Büttner;J. Tittel
摘要河流输送的溶解有机碳（DOC）是连接陆地生态系统和海洋生态系统碳库的重要环节。然而，目前还不清楚如何频繁DOC必须采样，以获得合理的负载估计。在这里，我们使用连续记录的特定的紫外线吸收系数（SAC）和排放的源头流在矿石山（德国）计算负载误差取决于DOC采样频率。SAC被用作DOC的代理。结果表明，每月、每两周和每周DOC采样分别低估了13-19%、10-13%和7-9%的负荷。我们的结论是，收集额外的数据，从高放电事件减少了错误显着。
Abstract Dissolved organic carbon (DOC) transported by rivers represents an important link between carbon pools of terrestrial and oceanic ecosystems. However, it is unclear how frequent DOC must be sampled to obtain reasonable load estimates. Here, we used continuous records of the specific UV absorption coefficient (SAC) and discharge from a headwater stream at the Ore Mountains (Germany) to calculate load errors depending on DOC sampling frequency. SAC was used as a proxy for DOC. The results show that the load was underestimated by 13-19% with monthly, 10-13% with bi-weekly and 7-9% with weekly DOC samplings, respectively. We conclude that collecting additional data from high discharge events decrease the error significantly.