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首页> 外文期刊>Deep-Sea Research >The oceanography of the Northern south China Sea Shelf-Sea (NoSoCS) and its adjacent Waters-overview and Highlights
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The oceanography of the Northern south China Sea Shelf-Sea (NoSoCS) and its adjacent Waters-overview and Highlights

机译：南中国海北部陆架海（NoSoCS）及其邻近海域的海洋学-概述和重点

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Tropical shelf-Seas constitute a sub-set of shelf-seas that has not been studied extensively. The Northern South China Sea Shelf-sea (NoSoCS) study is a continuation of the longstanding interest in Taiwan on the oceanography of the East Asian shelf-seas, and is an attempt to provide systematic and synoptic observations on a tropical shelf-sea. The two basic hypotheses in the study are: (1) as in the Ocean interior, the behaviors of the shelf-seas vary with latitude; and (2) the behaviors of the NoSoCS are representative of those of the shelf-seas in the tropical zone. The NoSoCS has been sampled bi-annually in alternating seasons since 2009. The results obtained primarily in 2009 to 2012 are presented here. As in the tropical Ocean interior, a distinguishing characteristic of the NoSoCS is its shallow mixed layer, with depths of about 40 m in the summer and 70 m in the winter. As similar mixed layer depths are found in the adjoining Northern South China Sea (SCS) and they are shallower than the shelf break depth of 120 m, the upper nutricline Water in the Northern SCS extends freely into the NoSoCS and forms a layer of Water with significant concentrations of the nutrients immediately below its mixed layer. Any process that can induce vertical mixing on the shelf may make the nutrients in this subsurface Water available for supporting biological activities in the mixed layer in the NoSoCS. Such processes include winter convective overturn over the entire NoSoCS as a result of surface cooling and the strong northeast monsoonal wind, winter formation of bottom Water in parts of the inner and middle shelf, the action of internal waves at the outer shelf and the continental slope, and upwelling maintained by wind and/or topography. The upwelling takes place in the summer off the coasts of Dongshan-Shantou and the northeast coasts of the Hainan Island, but year-round at the Taiwan Bank. Upwelling over the shelf break is not required for bringing the nutrients in the sub-surface Waters in the open SCS to the NoSoCS, and it was not observed. In addition to vertical mixing, terrestrial inputs, especially through the outflow of the Pearl River, which reaches its peak in the summer, also contribute to the spatial and temporal variations in the composition of the NoSoCS. The combined effects of all these processes lead to a unique seasonal pattern in the variations of the surface concentrations of chlorophyll-a in the NoSoCS, with two distinct yearly maxima in the winter and summer. (C) 2015 Elsevier Ltd. All rights reserved.
机译：热带架子海是架子海的一个子集，尚未进行广泛研究。南海北部陆架海（NoSoCS）研究是对台湾长期以来对东亚陆架海洋海洋学的兴趣的延续，并且是对热带陆架海洋进行系统和天气观测的尝试。研究中的两个基本假设是：（1）在海洋内部，架子海的行为随纬度而变化； （2）NoSoCS的行为代表了热带地区陆架的行为。自2009年以来，NoSoCS每隔两个季度进行两次采样。此处介绍了主要在2009年至2012年获得的结果。与热带海洋内部一样，NoSoCS的一个显着特征是其浅层混合层，夏季的深度约为40 m，冬季的深度约为70 m。由于在毗邻的南海北部（SCS）中发现了相似的混合层深度，并且比陆架破裂深度120 m浅，因此北部SCS中的上部营养液水自由延伸到NoSoCS中，并形成了一层水。紧挨其混合层下方的大量营养素。任何能够在架子上引起垂直混合的过程都可能使该地下水中的营养物质可用于支持NoSoCS混合层中的生物活性。这些过程包括由于表面冷却和强烈的东北季风影响的冬季，整个NoSoCS的冬季对流倾覆，冬季在内部和中层架子的底部形成底水，在外部架子和大陆坡上的内部波浪作用，以及通过风和/或地形维持的上升流。上升流发生在夏季，东山汕头沿海和海南岛东北沿海，但全年在台湾银行。将开放式SCS中的地下水域中的营养物带入NoSoCS不需要在架子折断处上升，也没有观察到。除垂直混合外，地面输入（尤其是通过珠江的水流输入，在夏季达到顶峰）也有助于NoSoCS组成的时空变化。所有这些过程的综合作用导致NoSoCS中叶绿素a表面浓度变化的独特季节性模式，冬季和夏季有两个不同的年度最大值。 （C）2015 Elsevier Ltd.保留所有权利。

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