Dissolved Organic Carbon Source Attribution in the Changjiang Outflow Region of the East China Sea.
Dissolved Organic Carbon Source Attribution in the Changjiang Outflow Region of the East China Sea.
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东海长江外流区溶解有机碳源归属
DOI：
10.3390/s21248450
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发表时间：
2021-12-17
期刊：
影响因子：
--
通讯作者：
Ma S
中科院分区：
文献类型：
--
作者：
Zhang X;Du Y;Mao Z;Bi L;Chen J;Jin H;Ma S
在复杂动态海洋环境下，色团性溶解有机物（CDOM）的多变光学性质使得建立一种鲁棒的溶解有机碳（DOC）定量反演算法变得困难。为了更好地了解影响长江稀释水（CDW）与宽大陆架海流相互作用时DOC和CDOM关系的主要因素，我们沿长江稀释水主轴和CDW北边界测量了CDOM的DOC浓度、吸收和荧光光谱。讨论了DOC的来源及其对DOC和CDOM光学性质关系的影响。我们得出以下结论：从整体上看，DOC和CDOM的吸收性能和荧光性能之间存在很强的正相关关系。CDW携带的陆地DOC与咸水混合稀释是控制CDOM光学特性的主要机制。利用CDOM光学特性建立反演模型反演长江口DOC。结果表明，不同来源的额外DOC的引入是导致区域光学复杂性导致DOC估计偏差的主要因素，而不是去除机制。总体而言，a（355）和Fs（355）异常高的黄浦江污水的输入会导致DOC的高估。在CDW的主轴上，与保守稀释法相比，原生DOC输入对DOC与CDOM相关性的影响可以忽略。CDW北部边界的DOC与CDOM的关系更为复杂，这可以归结为苏北海岸流对老黄河三角洲陆源物质的持续输入、黄海西部暖岸流对黄海物质的持续输入以及CDW对长江盆地物质的持续输入。研究结果表明，长期观测东海多源DOM输入的区域变化是必要的，这有助于评估东海多源DOM对DOC估算的影响程度。
The variable optical properties of chromophoric dissolved organic matter (CDOM) under the complicated dynamic marine environment make it difficult to establish a robust inversion algorithm for quantifying the dissolved organic carbon (DOC). To better understand the main factors affecting the relationship between the DOC and the CDOM when the Changjiang diluted water (CDW) interacts with the marine currents on the wide continental shelf, we measured the DOC concentration, the absorption, and the fluorescence spectra of the CDOM along the main axis and the northern boundary of the CDW. The sources of DOC and their impacts on the relationship between the optical properties of the DOC and CDOM are discussed. We reached the following conclusions: There are strong positive correlations between the absorptive and fluorescent properties of the DOC and the CDOM as a whole. The dilution of the terrestrial DOC carried by the CDW through mixing with saline sea water is the dominant mechanism controlling the characteristics of the optical properties of the CDOM. CDOM optical properties can be adopted to establish inversion models in retrieving DOC in Changjiang River Estuary. It is concluded that the introduction of extra DOC from different sources is the main factor causing the regional optical complexity leading to the bias of DOC estimation rather than removal mechanism. As whole, the input of polluted water from Huangpujiang River with abnormally high a(355) and Fs(355) will induce the overestimation of DOC. In the main axis of CDW, the impact from autochthonous DOC input to the correlation between DOC and CDOM can be neglected in comparison with conservative dilution procedure. The relationship between the DOC and the CDOM on the northern boundary of the CDW is more complicated, which can be attributed to the continuous input of terrestrial material from the Old Huanghe Delta by the Subei Coastal Current, the input of materials from the Yellow sea by the Yellow Sea Warm Western Coastal Current, and the input of materials from the Changjiang Basin by the CDW. The results of this study suggest that long-term observations of the regional variations in the DOM inputs from multiple sources in the interior of the CDW are essential, which is conducive to assess the degree of impact to the DOC estimation through the CDOM in the East China Sea.
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影响因子：
3.3
作者：
Chen, Chung-Chi;Gong, Gwo-Ching;Shiah, Fuh-Kwo
通讯作者：
Shiah, Fuh-Kwo
影响因子：
2.4
作者：
Chen, Hao;Zheng, Binghui;Qin, Yanwen
通讯作者：
Qin, Yanwen
影响因子：
2.8
作者：
Ferrari, GM;Dowell, MD
通讯作者：
Dowell, MD
影响因子：
3.9
作者：
Dai, Zhijun;Fagherazzi, Sergio;Gao, Jinjuan
通讯作者：
Gao, Jinjuan
DOI：
10.1016/s1569-4860(07)11004-4
发表时间：
2008-01-01
期刊：
ANALYSIS OF ENVIRONMENTAL RADIONUCLIDES
影响因子：
--
作者：
Aoyama, M.;Hirose, K.
通讯作者：
Hirose, K.