2012年秋季黄河口及莱州湾颗粒有机碳的地球化学特征及其影响因素

发布时间：2018-06-16 06:53

本文选题：颗粒有机碳 + 总悬浮颗粒物　；参考：《地球化学》2016年05期

【摘要】：根据2012年9月在黄河口及莱州湾取得的悬浮体和水文调查资料,探讨了非调水调沙期间黄河口及莱州湾颗粒有机碳(POC)的地球化学特征及其影响因素。结果表明:(1)2012年秋季黄河口及莱州湾POC浓度介于42.25~1018.87μg/L之间,平均为316.35μg/L,底层POC浓度高于表层,这与沉积物再悬浮有直接关系;(2)黄河口POC呈现近岸区高,远岸区低的趋势,高值区出现在新、老两个河口区域,指示了陆源输入对河口区POC的直接控制作用;(3)在盐度为26~28(psu)之间黄河口POC有高值,表明絮凝沉降作用对POC空间分布的影响;底层POC与浊度显著相关,表明海底沉积物再悬浮对研究区POC空间分布的直接影响;悬浮物含量超过20 mg/L时,生命态颗粒有机碳对总颗粒有机碳的贡献明显下降;(4)POC/PN值显示黄河口及莱州湾POC来源的复杂性,生物作用、沉积物再悬浮和黄河水沙输入对研究区的POC生物地球化学过程都有一定的影响。
[Abstract]:Based on the suspended matter and hydrological survey data obtained in the Yellow River Estuary and Laizhou Bay in September 2012, the geochemical characteristics and influencing factors of particulate organic carbon (POC) in the Yellow River Estuary and Laizhou Bay during the period of non-water and sediment transfer were discussed. The results showed that the POC concentration in the Yellow River Estuary and Laizhou Bay was between 42.25 渭 g / L and 1018.87 渭 g / L in autumn 2012, with an average of 316.35 渭 g / L, and the bottom POC concentration was higher than that in the surface layer, which was directly related to the sediment resuspension. The high value region appears in the new and old two estuary areas, indicating the direct control effect of land source input on POC in the estuary area, indicating that there is a high value of POC in the Yellow River Estuary between the salinity of 26 and 28, indicating the effect of flocculation sedimentation on the spatial distribution of POC. The bottom POC was significantly correlated with turbidity, which indicated that the resuspension of seabed sediment had a direct effect on the spatial distribution of POC in the study area, and when the suspended matter content was more than 20 mg / L, The contribution of living particulate organic carbon to total particulate organic carbon decreased significantly, indicating the complexity of POC sources in the Yellow River Estuary and Laizhou Bay. Sediment resuspension and Yellow River water and sediment input have certain influence on POC biogeochemical process in the study area.
【作者单位】：青岛海洋科学与技术国家实验室海洋地质过程与环境功能实验室;国家海洋局海洋沉积与环境地质重点实验室国家海洋局第一海洋研究所;
【基金】：海洋公益性行业科研专项经费项目(201205003,201105001) 中央级公益性科研院所基本科研业务费专项资助项目(GY0214G28) 国家自然科学基金(41206055) 山东省博士后创新项目专项资金项目(201303037)
【分类号】：P736.4

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