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采用TPTZ(2,4,6三吡啶-s-三嗪,C18H12N6)方法对2015年6月采集的南海北部表层海水,以及珠江口东侧S断面进行了碳水化合物的分析。结果表明,溶解单糖(dissolved monosaccharide,MCHO)、溶解多糖(dissolved polysaccharide,PCHO)及溶解总糖(total dissolved carbohydrate,TCHO)的浓度范围分别是0.22~13.66,1.51~21.02和2.63~26.24μmol C/L。表层海水MCHO、TCHO和PCHO具有相似的分布特点:近岸高,远海低;高值区大多分布在近岸受陆地影响较大的海区。S断面分析表明,该区域海水分层明显,MCHO、TCHO和PCHO分布较为相似,上层浓度高于下层浓度,浓度最高值出现在上层海水,部分站位受珠江冲淡水影响较大。表层海水的Chl a(chlorophyll a)与DOC(dissolved organic carbon)浓度分布大体上也呈现类似特点,不同之处在于水平分布方面Chl a的浓度分布与盐度分布更为类似,垂直分布方面在真光层以下Chl a与DOC的浓度分布无高值区。同时结果也表明二者的浓度分布对MCHO、TCHO和PCHO的分布有较大影响。
The carbohydrate analysis of the surface seawater in the northern South China Sea collected in June 2015 and the S section on the east side of the Pearl River Estuary was conducted using TPTZ (2,4,6-tris-pyridine-s-triazine, C18H12N6) The results showed that the concentrations of dissolved monosaccharide (MCHO), dissolved polysaccharide (PCHO) and total dissolved carbohydrate (TCHO) were 0.22 ~ 13.66, 1.51 ~ 21.02 and 2.63 ~ 26.24μmol C / L. The surface water MCHO, TCHO and PCHO have similar distribution characteristics: high nearshore and low distant sea; high values are mostly distributed in the coastal areas where the coastal area is greatly affected by the land. S cross-section analysis showed that the seawater stratification in this area is obvious, the distributions of MCHO, TCHO and PCHO are similar, the upper concentration is higher than the lower concentration, the highest concentration appears in the upper seawater, and some stations are greatly affected by the Pearl River freshwater. The concentrations of Chl a (chlorophyll a) and DOC (dissolved organic carbon) in the surface seawater are generally similar, except that the concentration distribution of Chl a is more similar to the salinity distribution in terms of horizontal distribution and that of vertical distribution There is no high value area for the concentration distribution of Chl a and DOC below the layer. The results also show that the concentration distribution of the two have a greater impact on the distribution of MCHO, TCHO and PCHO.