摘要
基于2007年4月对南黄海调查所得资料,对海水化学要素的分布特征及影响因素进行了探讨。结果表明,受浮游植物光合作用的影响,南黄海中北部上层海域出现了DO、pH的高值区以及营养盐的低值区,而底层则因有机物的分解,DO和pH较低而营养盐含量较高;受苏北沿岸水、长江冲淡水和/或台湾暖流前缘混合水的影响,南黄海西南部海域表、底层DO含量均较低,但却为营养盐的最高值区,且表层水中无机氮盈余状况的分布与该海域环流状况、尤其是苏北沿岸水的扩展途径密切相关,表现为无机氮相对过剩,而无机磷相对缺乏;南黄海西部沿岸流对营养盐往东南方向的输运态势较为明显,同时,首次从营养盐分布的角度揭示了这一水动力过程;受苏北沿岸水、黄海暖流以及两者之间的南黄海西部沿岸流主体的影响,南黄海斜断面上海水化学要素的分布具有明显的区域化特征和空间结构。
Based on the data collected from the Southern Yellow Sea during April, 2007, the distributions and influencing factors of the chemical parameters were studies. The DO concentration and pH were high, while the nutrient concentration was low due to the photosynthesis of phytoplankton in the upper water column of the central- north area of the Southern Yellow Sea; meanwhile, because of the decomposition of organic matter, the low-value area of the DO and pH existed in the bottom water with relation high nutrient. In the southwest area of the Southern Yellow Sea, the DO concentration was low, and the nutrient concentration was high in the surface and bottom water due to the influence of the Subei Coastal Water, Yangtze diluted water and/or the Taiwan Warm Current water; the distribution of the surplus condition of the inorganic nitrogen was closely related to the extension of the water circulation, especially the Subei Coastal Water. Obviously, nutrients were transported to the southeastern sea area because of the Southern Yellow Sea West Coastal Current, a hydrodynamic process being revealed for the first time through the distribution of nutrients. Vertical distributions of the chemical elements in the oblique section had regional characteristics and spatial structure as a result of the Subei Coastal Water, the Yellow Sea Warm Current and the Southern Yellow Sea West Coastal Current.
出处
《海洋科学》
CAS
CSCD
北大核心
2010年第3期52-60,共9页
Marine Sciences
基金
中国近海海洋综合调查与评价专项项目(908-01-ST03,908-01-BC14)
关键词
南黄海
化学要素
分布特征
Southern Yellow Sea chemical parameters distribution
