台湾东部黑潮与邻近东海水中的钡及其对黑潮水入侵的指示

发布时间：2018-05-10 19:14

本文选题：溶解钡 + 指示指标　；参考：《中国科学:地球科学》2017年08期

【摘要】：通过对台湾以东黑潮主流径及邻近东海海域2014年5~6月期间的调查,研究了海水中溶解钡(Ba)的地球化学分布特征,评估了黑潮对东海海水Ba的影响和输入通量,将Ba作为指示指标定量刻画了黑潮入侵东海的范围与程度.黑潮主流径各站位海水中溶解Ba垂直分布上从表层至深层浓度逐渐增高,浓度范围为4.91~19.2μg L~(-1).东海海域表层海水Ba浓度分布以近岸海域为最高,向外海逐渐降低;底层则出现近岸和外侧海域Ba浓度高,陆架中间海域Ba浓度低的现象.水交换模型估算得出黑潮水在5~10月间向东海的Ba输入通量共计为2.19×10~8kg,并以次表层水的输入通量为最大.调查海域Ba的分布特征指示黑潮在台湾东北部海域涌升,台湾海峡北向出水抑制黑潮表层水向东海陆架入侵,黑潮次表层水从陆架底层外侧逐渐影响东海.以溶解钡(Ba)作为端元估算参数计算得出,在调查期间,黑潮表层水对东海陆架区域影响不大,黑潮次表层水沿陆架底层向上爬升,从台湾东北海域沿陆架中部向西北方向侵入,形成一支黑潮入侵流,至钱塘江口附近黑潮水占比仍可达到65%左右.东海陆架底层外侧大部被黑潮水所控制,100m等深线以深处黑潮水能够占95%以上的比例.在台湾东北部DH9断面,黑潮次表层水从陆架坡折处沿底部向西侵入,黑潮水占比95%的位置可达122°E左右,垂直向上黑潮水所占比例越小.海水溶解Ba可以细致地刻画黑潮入侵东海的情景,其地球化学特性使其成为指示黑潮入侵东海的有效指标,为定量揭示黑潮与东海的相互作用提供了新的手段.
[Abstract]:The geochemical distribution characteristics of dissolved barium (Ba) in the sea water were investigated through the investigation of the main diameter of the Kuroshio and the East China Sea area in the east of Taiwan in 2014. The effects of the Kuroshio on the sea water Ba in the East China Sea and the input flux were evaluated. The range and degree of the intrusion of the black tide to the East China Sea were quantitatively described by Ba as a indicator. The vertical distribution of dissolved Ba in the sea water is increasing from the surface to the deep level, and the concentration range is 4.91~19.2 g L~ (-1). The distribution of Ba concentration in the sea surface sea water in the East China Sea area is the highest and gradually decreases to the outer sea, and the concentration of Ba in the near shore and outside sea area is high, and the concentration of Ba in the middle sea area is low. The water exchange model is estimated. The Ba input flux of the Kuroshio Water to the East China Sea in the 5~10 month is 2.19 x 10~8kg, and the input flux of the subsurface water is the largest. The distribution characteristics of the Ba in the investigation sea area indicate that the Kuroshio is rising in the northeast of Taiwan, and the water from the north of the Taiwan Strait inhibits the surface water from the Kuroshio to the East Sea shelf, and the subsurface water of the Kuroshio subsurface water is from the bottom of the shelf. The surface water of the Kuroshio surface water has little influence on the East China Sea shelf area during the investigation, and the subsurface water of the Kuroshio subsurface water rises upward along the bottom of the shelf and invades north-west in the northeast of Taiwan, forming a black tide intrusion flow to the Kuroshio near the Qian Tang estuary during the investigation. The water occupation ratio can still reach about 65%. The large part of the bottom layer of the East China Sea shelf is controlled by the black tide water, and the 100m contour line is more than 95% in the depth of the black tide water. In the DH9 section of the northeast of Taiwan, the subsurface water of the Kuroshio subsurface is invaded westward along the bottom of the shelf slope, and the black tide is occupied by about 122 E in the position of the black tide water, vertical to the Kuroshio Water. The smaller the proportion is, the sea water dissolved Ba can carefully describe the situation of the Kuroshio invasion of the East China Sea, and its geochemical characteristics make it an effective indicator to indicate the Kuroshio invasion of the East China Sea, which provides a new means to quantitatively reveal the interaction between the Kuroshio and the East China Sea.

【作者单位】：中国科学院海洋生态与环境科学重点实验室中国科学院海洋研究所;中国科学院大学;山东省分析测试中心;青岛海洋科学与技术国家实验室海洋生态与环境科学功能实验室;
【基金】：中国科学院创新先导专项项目(编号:XDA11020102) 青岛海洋科学与技术国家实验室“鳌山人才”计划项目(编号:2015ASTP-OS13) 鳌山科技创新计划项目深海专项项目(预研)(编号:2016ASKJ14) 山东省-国家基金委联合基金项目(编号:U1606404)资助
【分类号】：P731.23

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