论文部分内容阅读
海洋作为地球表面最大的碳库,在调节大气CO2方面起着非常重要的作用。在海洋碳循环以及涉及海洋酸化问题的研究中,测得海水碳酸盐体系4个参数总碱度(TA)、溶解无机碳(DIC)、二氧化碳分压(pCO2)、pH中的2个,运用热力学方程和平衡常数便可求得海水碳酸盐体系的各个分量。计算中表观解离常数是必需的因子,其准确与否直接决定最后的计算结果。本文介绍了近年来海水碳酸盐体系表观解离常数的研究进展,总结了海水中碳酸表观解离平衡常数的研究测定方法,并且运用文献实测的数据简要比较了不同作者测得的解离平衡常数之间的差异,总结了计算4组参数较优的表观解离平衡常数,以便在海水碳酸盐体系研究中合理选用。
The oceans, the largest carbon pool on Earth’s surface, play a very important role in regulating atmospheric CO2. In the study of ocean carbon cycle and ocean acidification, the four parameters of seawater carbonate system, including total alkalinity (TA), dissolved inorganic carbon (DIC), partial pressure of carbon dioxide (pCO2), pH of 2, Using thermodynamic equations and equilibrium constants can be obtained for each component of the seawater carbonate system. The apparent dissociation constant in the calculation is an essential factor, and its accuracy or not directly determines the final calculation result. This paper introduces the research progress of apparent dissociation constant of seawater carbonate system in recent years, summarizes the method of determination and determination of apparent dissociation equilibrium constant of carbonic acid in seawater, and compares the measured results of different authors with literature data From the difference between the equilibrium constants, the apparent dissociation equilibrium constants for calculating the four groups of parameters are summarized, so that they can be selected reasonably in the study of seawater carbonate system.