春季黄渤海溶解有机碳的平面分布特征

依据2010年4～5月对黄渤海调查所得的数据,分析了黄渤海溶解有机碳(dissolved organic carbon,DOC)的含量及其平面分布特征,并对其影响因素进行了初步探讨.结果表明,2010年春季黄渤海DOC的浓度范围为0.96～4.71 mg.L-1,平均浓度为2.27 mg.L-1.平面分布上,DOC整体呈现南北近岸浓度高、中部外海浓度低的特点.在渤海西部近岸、山东半岛东部及长江口东北部均存在高值,尤其是渤海西部近岸,DOC浓度最高达到4.71 mg.L-1,这主要是受河流输入和沿岸流的影响;低值区则主要集中在南黄海中部外海,DOC浓度普遍低于1.50 mg.L-1.

Distribution of Dissolved Organic Carbon in the Bohai Sea and Yellow Sea in Spring

Based on the data from cruises that carried out in the Yellow Sea and Bohai Sea from April to May, 2010,the horizontal distribution of DOC was studied. And the influencing factors were preliminary discussed. The results showed that the concentration of DOC in the Yellow Sea and Bohai Sea ranged from 0.96 to 4.71 mg·L^-1 in spring and the average content was 2.27 mg·L^-1. In horizontal distribution, the highest DOC content appeared in the coastal zones both in the south and the north and it tended to decrease toward the offshore in central section on the whole. The highest DOC value was in the nearshore in the western of Bohai Sea and eastern of Shandong Peninsula which was mainly affected by the terrestrial inputs and the offshore current, especially in the nearshore of the western of Bohai Sea, the highest DOC content was 4.71 mg·L^-1.The second highest DOC value was in the Northeast of Yangtze River Estuary which was mainly affected by the Yangtze River Diluted Water (YRDW). However, the low DOC content was mainly found in open seas in the central of the South Yellow Sea,and the DOC value was lower than 1.50 mg·L^-1.