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依据2005年3月SOLAS计划第一航次调查得到的黄海表层海水二氧化碳分压(pCO_2)数据,并结合水文、化学和生物等要素的同步观测资料,重点分析了2005年初春季节整个黄海pCO_2的分布特征及其生物地球化学控制机制。本次调查的pCO_2测得值在360～640μatm之间,平均值为486μatm,表现为大气CO_2的1个源,这主要是因为,初春3月份,黄海水性仍然较多地保持着冬季海水上下垂直混合的特性,富含高CO_2的底层水不断上涌维持了表层海水较高的pCO_2,同时由于底层高无机碳和高营养盐水体的不断补充,也维持了表层较高的叶绿素a浓度。3月份黄海表层pCO_2的分布趋势明显受到以叶绿素a表征的生物活动的影响,在北黄海及沿岸流区出现了pCO_2低值区,但这种影响并不能从根本上改变pCO_2分布的源/汇格局。
Based on the data of carbon dioxide partial pressure (pCO_2) in the Yellow Sea surface water from the first survey of the SOLAS program in March 2005 and the simultaneous observation of hydrological, chemical and biological elements, the distribution of pCO_2 throughout the Yellow Sea in early spring 2005 was analyzed in detail Characteristics and Biogeochemical Control Mechanism. The pCO_2 values measured in this survey ranged from 360 to 640 μatm with an average of 486 μatm, indicating a source of CO 2 in the atmosphere mainly due to the fact that in early spring March, the yellow sea water still maintained vertical sea water verticality In the meantime, the high CO2-rich bottom water keeps upwelling the higher pCO2 of the surface seawater and maintains the higher chlorophyll-a concentration of the surface layer due to the continuous replenishment of high inorganic carbon and high-nutrient brine in the bottom. The distribution of pCO_2 in the surface layer of the Yellow Sea in March was obviously affected by the biological activity characterized by chlorophyll a. There was a low pCO_2 region in the northern Yellow Sea and coastal stream areas, but this effect did not fundamentally change the source / sink of pCO_2 pattern.