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基于2015年冬季在南黄海海域现场观测获得的CTD和CO_2等数据,分析了该海域海-气CO_2通量,探讨了该海域冬季温、盐度和表层CO_2分压(pCO_2)等要素的分布特征及其影响因素。结果表明:冬季南黄海西侧海域受黄海沿岸流的影响,呈现低温、低盐的特征,南黄海中部受黄海暖流影响,呈高温高盐特征;南黄海靠近沿岸海域水体垂直混合强烈,温盐垂直分布较为均匀。南黄海海域表层pCO_2平均值为(385.34±43.62)μatm。表层pCO_2分布具有明显的区域差异,海区中部pCO_2整体上大于近岸,因受长江冲淡水与黄海沿岸流的水平及垂直混合作用,长江口北部局部区域最高通量达27.81 mmol/(m~2·d),但总体表现为大气碳汇,平均通量达(-2.47±3.91)mmol/(m~2·d);山东半岛东南部海域较高的pCO_2受控于温度,同时与黄海沿岸流带来的高碳酸盐等水体的混合有关,表现为大气碳源,平均通量为(0.11±0.80)mmol/(m~2·d)。整个调查海域平均通量为(-2.24±3.74)mmol/(m~2·d),表现为大气CO_2的碳汇。
Based on the data of CTD and CO_2 obtained from the field observations in the South Yellow Sea in winter in 2015, the CO_2 flux of sea-atmosphere was analyzed and the distribution of temperature, salinity and pCO_2 in winter Characteristics and influencing factors. The results show that in the winter, the western Yellow Sea coast is affected by the Yellow Sea coast, showing the characteristics of low temperature and low salt. The central part of the southern Yellow Sea is affected by the Yellow Sea warm current and is characterized by high temperature and high salinity. The water in the southern Yellow Sea near the coastal area is strongly mixed vertically, Vertical distribution is more uniform. The average pCO_2 in the southern Yellow Sea was (385.34 ± 43.62) μatm. The pCO_2 distribution in the middle of the sea area is obviously larger than that in the nearshore because of the horizontal and vertical mixing of the flow along the Yangtze River and the Yellow Sea. The maximum flux in the northern part of the Yangtze Estuary reaches 27.81 mmol / (m ~ 2) · D), but the overall performance of the atmospheric carbon sinks, the average flux (-2.47 ± 3.91) mmol / (m ~ 2 · d); southeast Shandong Peninsula higher pCO_2 controlled by temperature, and the Yellow Sea coast (0.11 ± 0.80) mmol / (m ~ 2 · d), which is related to the mixing of high-carbonates and other water bodies caused by water flow. The average flux in the whole surveyed sea area was (-2.24 ± 3.74) mmol / (m ~ 2 · d), showing the carbon sink of atmospheric CO 2.