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利用2011年5月的调查资料,分析了春季东海营养盐分布特征。受长江冲淡水影响,表层长江口附近营养盐浓度较高;外海受黑潮表层水的影响营养盐浓度较低。计算并分析了跨200 m等深线的营养盐输运通量,结果表明黑潮在台湾东北部和九州岛西南部入侵陆架并将营养盐输运到陆架上,中段(26°N~29°N)则是营养盐向外输运。春季黑潮跨过200 m等深线向东海陆架的体积输运净通量为0.44 Sv,DIN、PO_4-P、Si O_3-Si通量分别为8.93 kmol/s、0.46 kmol/s、8.22 kmol/s。春季通过台湾海峡的营养盐DIN、PO_4-P、Si O_3-Si通量分别为6.65 kmol/s、0.41 kmol/s、6.52 kmol/s。表明春季台湾暖流对东海陆架海域营养盐的贡献与黑潮的贡献相当。
Using the survey data from May 2011, the distribution characteristics of nutrients in the East China Sea in spring were analyzed. Affected by the Yangtze River’s freshwater, the nutrient concentrations near the Changjiang Estuary are high, and the sea water is affected by the Kuroshio surface water at a lower nutrient concentration. Nutrient transport fluxes across the 200 m isobaric line were calculated and analyzed. The results show that Kuroshio invaded the shelf in the northeast of Taiwan and southwestern Kyushu Island and transported nutrients to the shelf. The middle section (26 ° N ~ 29 ° N) is the outward transport of nutrients. The net flux of spring tide over the 200 m isobath over the East China Sea shelf was 0.44 Sv. The fluxes of DIN, PO_4-P and Si O_3-Si were 8.93 kmol / s, 0.46 kmol / s and 8.22 kmol, respectively / s. The fluxes of DIN, PO_4-P and Si O_3-Si, which are nutrients in the Taiwan Strait in spring, were 6.65 kmol / s, 0.41 kmol / s and 6.52 kmol / s, respectively. It shows that the contribution of spring warm current in Taiwan to the nutrient salt in the shelf area of the East China Sea is comparable to that of the Kuroshio.