Investigation of the CO2 System during the 1989-GOFS Expedition in the North Atlantic

总CO2浓度和CO2分压 将在预定的时间内在离散的水样中进行测量， 1989-GOFS北大西洋考察沿着西经20度 在33 N和60 N之间。 总的二氧化碳浓度将是 在海上用库仑计测定，精确度为 +1.5 uM/kg或更好，并且CO2分压将为 也可在海上用气体平衡器测定 精密度为0.1%。 与一队 两名分析员（即每台仪器一名），40至45岁 每天将分析水样中的每一种二氧化碳 特性. 以这种数据生产速度， 测量的精度，相关的CO2分布 具有主要的海洋动力学特征， CO2在透光层内和透光层以下的分布 海洋可以解决。 CO2和pCO 2的数据收集在 探险队将成为基本的公共数据集的一部分， GOFS的参与者。 利用水文、生物和 化学数据，将解决以下问题; 1)以50 N为中心强CO2汇区的起源 和20 W，这是在地表水中观察到的， 1981年-TTO/北大西洋研究; 2)C/P比值的地理和深度变化 对于水柱中的再生营养物， Takahashi等人（1985）的分析方法; 3)大气中CO2-营养化学的季节性变化 亚北极和温带环流系统，以及 这两个机制的生物地球化学过程 发生在过渡区。

The total CO2 concentration and partial pressure of CO2 will be measured in discrete water samples during the scheduled 1989-GOFS North Atlantic Expedition along the 20 W meridian between 33 N and 60N. The total CO2 concentration will be determined at sea by means of a coulometer with a precision of +1.5 uM/kg or better, and the CO2 partial pressure will be determined also at sea by means of equilibrator-gas chromatograph method with a precision of 0.1%. With a team of two analysts aboard (i.e. one for each instrument), 40 to 45 water samples will be analyzed per day for each of these CO2 properties. With this rate of data production and with the precision of measurements, the CO2 distribution associated with major ocean dynamic features as well as fine features in the CO2 distribution within and below the photic zone of the ocean can be resolved. The total CO2 and pCO2 data collected during the expedition will become part of the basic communal data set for the GOFS participants. Using the hydrographic, biological and chemical data, the following questions will be addressed; 1) the orgin of a strong CO2 sink area centered at 50 N and 20 W, which was observed in the surface water during the 1981-TTO/North Atlantic Study; 2) the geographic and depth variability of the C/P ratio for regenerated nutrients in the water column using the isopycnal analysis method of Takahashi et al. (1985); and 3) seasonal changes in the CO2-nutrient chemistry in the subarctic and temperate gyre regimes, and interaction between these two regimes in terms of the bio-geochemical processes occurring within the transition zone.