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根据 2 0 0 0年 4月— 2 0 0 1年 3月在三亚湾的定点现场观测资料分析结果表明 :6— 8月份受外来冷水上升流的入侵和影响 ,使该湾水域在该季节形成明显的温跃层 ,底部和中部有明显的低温层。在上升流入侵期间 ,该湾水域平均温跃层强度为 0 .1 3 8— 0 .2 83℃·m- 1 ,最大温跃层强度为 0 .41 9— 0 .440℃·m- 1 ,底部最低水温在 2 2℃左右。 9月—翌年 3月温跃层消失 ,海水混合流动充分 ,温度垂直分布均匀。 3月份水温开始升高 ,至 5月水温总体升至最高 ,并由于高气温及强太阳的辐射作用 ,5月份形成温跃层。溶解无机氮 (DIN)的分布特征表明 ,硝酸盐、亚硝酸盐在冷水上升流入侵季节 ,其含量明显提高 ,比平时分别提高 :1 0 .2 0 %(表层 )、3 7.2 0 %(中层 )、83 .81 %(底层 )和 6 4 .0 4 %(表层 )、82 .96 %(中层 )、1 1 9.41 %(底层 )。氨态氮不直接受上升流影响 ,但季节变化特征明显。
Based on the site-specific observations in Sanya Bay from April 2000 to March 2001, the results show that the influx and influence of the incoming cold water upwelling in June-August caused the formation of the bay waters in that season The obvious thermocline, the bottom and the central obvious cold layer. During the upwelling invasion, the mean thermocline strength of the Bay waters was 0.138.80.283 ℃ · m-1, and the maximum thermocline strength was 0.41 9-40.0 ℃ · m-1 , The lowest water temperature at the bottom of about 2 2 ℃. September - The thermocline disappears in March of the following year, the seawater is well mixed and the temperature is evenly distributed vertically. The water temperature started to rise in March, bringing the overall water temperature to the highest in May. Due to the high temperature and the strong solar radiation, a thermocline was formed in May. The distribution characteristics of dissolved inorganic nitrogen (DIN) showed that the contents of nitrate and nitrite in the invasion season of cold water upwelling increased obviously, increasing from 120.2% (surface layer) to 37.2% (middle layer) ), 83.81% (bottom) and 64.04% (top), 82.96% (middle) and 11.41% (bottom). Ammonia nitrogen is not directly affected by the upwelling, but the seasonal variation is obvious.