Nutrient budgets for the South China Sea basin
Nutrient budgets for the South China Sea basin
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DOI：
10.1016/s0304-4203(01)00041-x
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发表时间：
2001-09-01
期刊：
影响因子：
3
通讯作者：
Pai, SC
中科院分区：
文献类型：
--
作者：
Chen, CTA;Wang, SL;Pai, SC
变化的大气强迫和复杂的地理环境使得南海（SCS）的流动非常复杂。黑潮表层沃茨常年流入南海，而南海表层沃茨则通过巴士海峡流出。累积而言，在雨季，南海（0-350米深度）有少量（类似于1 Sv）地表水净流出，但在旱季，巴士海峡有净流入（类似于3 Sv）。利用箱型模型计算了巽他陆架水在丰水期和枯水期的入流和出流，并计算了海水、磷、氮和硅酸盐的收支。结果指出，在雨季和旱季，通过巴士海峡进入西菲律宾海（WPS）的中间水流出量（350-1350米深），尽管这沿着它携带的营养物质，在旱季（2 Sv）比在雨季（1.8 Sv）略大。更重要的是，富含营养盐的南海中层水通过巴士海峡的输出，随后上升到东海陆架（ECS）。通过平衡氮收支计算，南海陆架的反硝化速率为0.11molNm（-2）年（-1）。基于质量平衡和一维对流扩散模型的耗氧率和营养盐再生率介于白令海和日本海之间。(C)2001 Elsevier Science B. V.保留所有权利。
Varying atmospheric forcing and an elaborate geography make for a complex flow in the South China Sea (SCS). Throughout the year, the surface waters of the Kuroshio flow into the SCS, while the surface waters of the SCS flow out through the Bashi Channel. Cumulatively, there is a small (similar to 1 Sv) net outflow of surface water (0-350-m depth) from the SCS in the wet season, but a net inflow (similar to 3 Sv) in the dry season through the Bashi Channel. The differences are mainly made up by inflow and outflow of Sunda Shelf Water in the wet and dry seasons, respectively.Seawater, phosphorus, nitrogen and silicate budgets were calculated based on a box model. The results point out an intermediate water outflow (350-1350-m depth) into the West Philippine Sea (WPS) through the Bashi Channel in both the wet and dry seasons, though this, along with the nutrients it carries, is slightly larger in the dry season (2 Sv) than in the wet (1.8 Sv). More importantly, the export of nutrient-laden SCS intermediate water through the Bashi Channel subsequently upwells onto the East China Sea (ECS) shelf. The denitrification rate for shelves in the SCS is 0.11 mol N m(-2) year(-1), calculated by balancing the nitrogen budget. The oxygen consumption and the nutrient regeneration rates, based on the mass-balance and the one-dimensional advection-diffusion models, stand between those for the Bering Sea and the Sea of Japan. (C) 2001 Elsevier Science B.V. All rights reserved.