| 夏季黄海不同水团溶解有机物分布特征 |
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| 引用本文： | 王艺超,刘小艳,宋贵生,Xie Huixiang.夏季黄海不同水团溶解有机物分布特征[J].海洋学报,2019,41(12):145-155. |
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| 作者姓名： | 王艺超 刘小艳 宋贵生 Xie Huixiang |
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| 作者单位： | 天津科技大学海洋与环境学院,天津300457;天津大学海洋科学与技术学院,天津300072;天津科技大学海洋与环境学院,天津300457;加拿大魁北克大学里姆斯基分校海洋科学研究所,魁北克里姆斯基G5L 3A1 |
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| 基金项目： | 国家科技部重点研发计划（2016YFC1401602）；国家自然科学基金（41606098）；天津市自然科学基金（16JCQNJC08000）。 |
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| 摘 要： | 依据2017年8—9月对黄海海域溶解有机物(DOM)的调查，探讨了夏季黄海海水中溶解有机碳(DOC)和有色溶解有机物(CDOM)的空间分布特征。在表层海水中，受陆源影响较大的近岸海域CDOM含量相对较高，北黄海冷水团区域由于水产养殖的饵料引起DOC浓度升高，且该部分DOC以无色为主。DOC浓度随深度逐渐降低，而CDOM逐渐升高，该特征在冷水团区域更为显著，因此DOC和CDOM在冷水团区域的表底差异远大于浅水区的非冷水团区域。陆源输入和初级生产是引起表层DOC升高的主要原因，而光漂白则引起CDOM降低，同时光漂白还导致表层水体中CDOM分子量和芳香性低于底层。底层溶解氧饱和度在冷水团为80%～93%，均表现为弱不饱和状态。层化不仅阻碍了O2向底层水体输送，还抑制了DOC和CDOM的垂向混合，这是引起冷水团区域表底层DOC和CDOM差异较大的主要原因。
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| 关 键 词： | 黄海冷水团 缺氧 溶解有机碳 有色溶解有机物 |
| 收稿时间： | 2018/12/25 0:00:00 |
| 修稿时间： | 2019/3/1 0:00:00 |
Distribution of dissolved organic matter in different water masses in the Yellow Sea in summer |
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| Wang Yichao,Liu Xiaoyan,Song Guisheng and Xie Huixiang.Distribution of dissolved organic matter in different water masses in the Yellow Sea in summer[J].Acta Oceanologica Sinica (in Chinese),2019,41(12):145-155. |
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| Authors: | Wang Yichao Liu Xiaoyan Song Guisheng and Xie Huixiang |
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| Institution: | 1.College of Marine and Environmental Sciences, Tianjin University of Science and Technology, Tianjin 300457, China2.School of Marine Science and Technology, Tianjin University, Tianjin 300072, China3.Institute of Marine Sciences of Rimouski, University of Quebec at Rimouski, Quebec G5L 3A1, Canada |
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| Abstract: | Based on the investigation of dissolved organic matter (DOM) in the Yellow Sea from August to September 2017, the spatial distributions of dissolved organic carbon (DOC) and chromophoric dissolved organic matter (CDOM) were studied in the Yellow Sea. In surface seawater, CDOM was higher in the nearshore water, which might be caused by the relatively significant influence by the river input, while colorless DOC concentration in the north Yellow Sea Cold Water (YSCW) area was enhanced by aquaculture. The DOC concentration decreased along depth in the water column, but an inverse trend for CDOM, especially in the YSCW area. Terrestrial DOC input and primary production were mainly responsible for the surface DOC enhancement, while photobleaching induced the decrease of CDOM. Additionally, photobleaching also decreased the molecular weight and aromaticity of CDOM in surface water. In the YSCW, O2 was slightly unsaturated, with the saturation degree of 80%-93%. In this area, strong stratification prevented the vertical diffusion of O2 to bottom water. Additionally, stratification could also restrain the vertical mixing of DOC and CDOM, which was mainly responsible for the large difference of DOC and CDOM between surface and bottom waters. |
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| Keywords: | Yellow Sea Cold Water low oxygen dissolved organic carbon chromophoric dissolved organic matter |
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