【摘要】 以所建立的三维生物-物理耦合模型估算了渤海碳循环过程,探讨了水平对流、河流输入、氮磷循环、非保守输运等过程对渤海低营养级系统的影响.渤海是大气二氧化碳微弱的汇.在碳循环中,总光合生产的13 7%进入营养的高一级,76 8%被自身呼吸消耗.营养盐再生主要源于内部生物地球化学循环,有机物的矿化过程是营养盐从有机向无机形态转换的主要机制.水平对流过程降低了海域生物量,有利于减轻局部海域的富营养化程度.河流输入只引起局部海域系统调整,渤海生物自净能力十分有限,控制限制生物生长的营养盐的排放有利于减少浮游植物的生物量.更多还原

【Abstract】 Carbon cycle in the Bohai Sea is estimated by using a three-dimensional ecosystem model coupled with a 3-D hydrodynamic model. The phytoplankton dynamic processes, horizontal advection, nutrient input from the Huanghe River, nitrogen and phosphate cycle, non-passive transport, are discussed. It is concluded that the Bohai Sea is a weak sink of CO₂ of the atmosphere. 13.7% of the gross alge-production is grazed by zooplankton and （76.8%） is consumed by respiration itself. The main source of the nutrient reproduction is the inner biogeochemical cycle while reminerilization is the mechanism to transfer the nutrient from organism to inorganism. The biomass is reduced by the horizontal advection and active circulation can do benefit to decrease eutrophication level. Shutting down the nutrient loads from the Huanghe River can induce the change of the adjacent area system. The biological self-purification ability of the Bohai Sea is very limited. Controlling to the limited-nutrient is more fitted for reducing the biomass of phytoplankton.更多还原