摘要
用磷酸盐上的历史的数据的分析在向南,磷酸盐河口向西并且向北从东方同等地被供应的 Changjiang (长江) 河口表演采购原料。这些来源包括 Changjiang 河,台湾温暖的水流(TWC ) ,一个气旋类型旋涡,和 32 ° N Upwelling,供应在不同时间,方法和紧张的不同磷酸盐。他们的供应磷酸盐集中的大小在 Changjiang 河 【
的顺序与尺寸被联系 TWC 【
32 ° N Upwelling 【
供应的气旋类型旋涡,和持续时间:Changjiang 河 】
TWC 】
气旋类型旋涡 】
32 ° N Upwelling。四来源供应了很多磷酸盐以便在河口的磷酸盐集中在 0.2 μmol/L 上面被放在以前的年,令人满意浮游植物生长。磷酸盐集中的水平、垂直的分发在 122 ° E /31 ° N 在浅海洋的区域附近显示出那,在低滋养的集中的 TWC 变得一起来通过海底部的 welling 并且从海底部带上营养素到海洋的表面。另外,磷酸盐集中的水平分发与水藻的一致:Rhizosolenia 柔韧一, Rhizosolenia calcaravis 和 Skeletonema,它显示出那在高水位线或 Changjiang 河的低水期间不管,这些 TWC 带的种类变得占优势种类。因此,作者相信 TWC 沿着海岸从南方流动了到北方并且在偏斜起了一个作用从南部的方面的 Changjiang 河流动。
Analysis using historical data on the phosphate sources in Changjiang (Yangtze River) estuary show that phosphate was supplied equally from the east, south, west and north of the estuary. These sources include the Changjiang River, the Taiwan Warm Current (TWC), a cyclone-type eddy, and the 32°N Upwelling, supplying different phosphates in different times, ways and intensities. The magnitude of their supplying phosphate concentration was related with the size in the order of the Changjiang River 〈 the TWC 〈 the 32°N Upwelling 〈 the cyclone-type eddy, and the duration of the supplying was: the Changjiang River 〉 the TWC 〉 the cyclone-type eddy 〉 the 32°N Upwelling. The four sources supplied a great deal of phosphate so that the phosphate concentration in the estuary was kept above 0.2 pmol/L in previous years, satisfying the phytoplankton growth. The horizontal and vertical distribution of the phosphate concentration showed that near shallow marine areas at 122°E/31°N, the TWC in low nutrient concentration became an upwelling through sea bottom and brought up nutrients from sea bottom to marine surface. In addition, horizontal distribution of phosphate concentration was consistent with that of algae: Rhizosolenia robusta, Rhizosolenia calcaravis and Skeletonema, which showed that no matter during high water or low water of Changjiang River, these species brought by the TWC became predominant species. Therefore, the authors believe that the TWC flowed from south to north along the coast and played a role in deflecting the Changjiang River flow from the southern side.
基金
Supported by Key Laboratory of Marine Spill Oil Identification and Damage Assessment Technology,SOA,the Director's Foundation of the North Sea Monitoring Center
Chinese Academy of Sciences (No.KZCX 2-207)
the Project of Ecological Environment in Fishery and Technology Controlling Pollution in Zhoushan Fishing Ground (No.2007c23075)
关键词
长江河口
磷酸盐
台湾暖流
上升流
气旋型漩涡
ChangJiang estuary
phosphate sources
Taiwan Warm Current
the 32°N Upwelling
cyclone-type eddy