论文部分内容阅读
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.
Based on the investigation of the mainstream of Kuroshio in the east of Taiwan and the adjacent East China Sea from May to June 2014, the geochemical distribution characteristics of barium (Ba) dissolved in seawater were studied. The influence of Kuroshio on the Ba of the East China Sea and the input Flux and Ba as an index to quantitatively characterize the extent and extent of Kuroshio intrusion into the East China Sea.The vertical distribution of dissolved Ba in seawater at each station of the Kuroshio main stream gradually increased from the surface to the depth and the concentration ranged from 4.91 to 19.2 μg L ~ (-1) .The distribution of Ba concentrations in the surface seawater of the East China Sea was the highest in the coastal waters and gradually decreased in the open sea, while in the lower sea areas Ba concentrations were high in the nearshore and outback waters and low in the Ba sea waters. It is concluded that the input flux of Ba into the East China Sea is 2.19 × 10 ~ 8kg and the input flux of subsurface water is the largest in the Kuroshio water from May to October. The distribution characteristics of Ba in the surveyed sea areas indicate that the Kuroshio in northeastern Taiwan The rising of the sea area and the northward discharge of the Taiwan Strait can restrain the surface Kuroshio surface water from intrusion into the East China Sea continental shelf, and the sub-surface water in the Kuroshio gradually affects the East China Sea from the outside of the bottom layer of the shelf. Calculated by estimating barium (Ba) Kuroshio surface water The influence of the Kuroshio sub-surface water on the bottom of the continental shelf climbed upward from the northeastern coast of Taiwan toward the northwest, resulting in a Kuroshio intrusion, and the proportion of Kuroshio near the Qiantang Estuary still reached 65 % .At the outer part of the bottom layer of the East China Sea continental shelf, most of the groundwater is controlled by the Kuroshio water, and the depth of 100m isobath can account for more than 95% of the Kuroshio water.At the DH9 section in northeastern Taiwan, Westward intrusion, the location of 95% of the Kuroshio water is about 122 ° E, and the proportion of Kuroshio in the vertical direction is smaller. Ba dissolves in the sea and can describe the invasion of the Kuroshio in the East China Sea in a meticulous manner. Its geochemical characteristics make it Indicating the effective indicators of Kuroshio’s invasion of the East China Sea provides a new measure for quantitatively revealing the interaction between the Kuroshio and the East China Sea.