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首页> 外文期刊>Estuarine Coastal and Shelf Science >Changes in concentrations of oxygen, dissolved nitrogen, phosphate, and silicate in the southern Yellow Sea, 1980-2012: Sources and seaward gradients
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Changes in concentrations of oxygen, dissolved nitrogen, phosphate, and silicate in the southern Yellow Sea, 1980-2012: Sources and seaward gradients

机译：1980-2012年黄海南部的氧气，溶解氮，磷酸盐和硅酸盐的浓度变化：来源和海向梯度

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To investigate the influence of nutrients on the occurrence of the world's largest trans-regional green tide bloom along the coast of the southern Yellow Sea, spatial and temporal variation in dissolved inorganic nutrients, dissolved oxygen and the dissolved inorganic nitrogen/phosphorus (N/P ratio) in the southern Yellow Sea from the 1980s to 2012 were analyzed on the basis of our field data and historical data. The transport and concentration of nutrients and oxygen may be significantly affected by the complex bydrographic conditions that were found in the southern Yellow Sea year-round. The input from diverse nutrient sources, especially from the Yangtze river plume, the rising nutrient loading from rivers and mariculture along the Subei coast, could contribute to sustaining green algal blooms. The highest chlorophyll-a concentration appeared in 2012 of the study area. The horizontal distribution of nitrate, phosphate and silicate generally decreased from the nearshore to offshore waters from the 1980s to the present. A zone of high nutrient concentrations was generally found in the southwestern southern Yellow Sea (121-123 degrees E, 32-33 degrees N) over the past three decades, which may be primarily induced by the input of the Yangtze river plume into this area. The lowest nutrient concentrations were found in the mid-north of the southern Yellow Sea (122-124 degrees E, 34-36 degrees N). A zone of high DO concentrations was identified in the northeastern region of the study area (122-123.5 degrees E, 35-36 degrees N). Though ammonium values fluctuated during 1984-2012, nitrate and DIN concentrations increased across the 30 years of sampling, implying the intense influence of terrestrial discharge to the southern Yellow Sea. And the high nitrogen levels may be one of the most important contributors to green algal blooms in this area. Phosphate concentrations fluctuated from the 1980s to 2005 and have since decreased. A large upward spike in the N/P ratio was apparent in 2008 and since, and the DO concentration decreased sharply in the same year. Concentrations of dissolved inorganic nutrients and oxygen were generally high in winter, lower in summer. (C) 2014 Elsevier Ltd. All rights reserved.
机译：研究养分对黄海南部沿海地区世界上最大的跨区域绿潮潮的发生，溶解的无机养分，溶解的氧和溶解的无机氮/磷（N / P）的时空变化的影响根据我们的实地数据和历史数据分析了1980年代至2012年黄海南部地区的水质比值。营养盐和氧气的运输和浓度可能会受到全年在黄海南部发现的复杂海底条件的影响。来自各种营养物来源的输入，特别是来自长江羽流的营养物，来自苏北沿岸河流和海水养殖的营养物负荷的增加，可能有助于维持绿色藻类的大量繁殖。叶绿素-a的最高浓度出现在研究区域的2012年。从1980年代到现在，硝酸盐，磷酸盐和硅酸盐的水平分布通常从近岸水域到近海水域下降。在过去的三十年中，黄海西南西南部（东经121-123度，北纬32-33度）通常发现了一个营养高的区域，这可能主要是由于长江羽流输入该区域引起的。 。在南黄海的中北部发现最低的养分浓度（东经122-124度，北纬34-36度）。在研究区域的东北地区（东经122-123.5度，北纬35-36度）确定了一个高溶解氧浓度的区域。尽管铵值在1984-2012年期间波动，但在采样的30年中硝酸盐和DIN的浓度有所增加，这暗示着陆上排放物向南黄海的强烈影响。高氮含量可能是该地区绿色藻华的最重要因素之一。磷酸盐浓度从1980年代到2005年一直在波动，此后一直下降。自2008年以来，N / P比出现了大幅上升，此后DO浓度在同年急剧下降。冬季，溶解的无机养分和氧气的浓度通常较高，夏季则较低。 （C）2014 Elsevier Ltd.保留所有权利。

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