JGOFS - Seasonal Study of Carbon Chemistry in the Eastern Equatorial Pacific

赤道太平洋占了全球 海洋/大气CO2系统，是最大的区域来源 二氧化碳排放到大气中。 过程的敏感性 控制pCO 2对气候强迫的影响， 厄尔尼诺/南方涛动循环对海表pCO 2的影响， 赤道生产的明显变化， 冰河时期 JGOFS赤道太平洋的中心目标 过程研究是为了阐明物理之间的联系， 循环以及生物和化学过程， 控制海洋表面的二氧化碳分压 这个项目的关键部分 必须是测量二氧化碳分压与其他 化学和生物测量。 pCO 2，总CO2，和 海洋上层的碱度将使用已证实的和 标准方法，对两个“调查”上层海洋JGOFS 游轮. 直接测量pCO 2，而不是 从其他测量值计算pCO 2，是必要的， 精确计算海气通量。 总量变化 CO2和碱度将制约有机质的动态 碳和方解石。 碳酸盐化学数据 将被纳入一个详细的物理循环模型 赤道太平洋，以解决温跃层的问题 通风对养分利用率的影响 大气二氧化碳分压

The equatorial Pacific represents a significant portion of the ocean/atmosphere CO2 system and is the largest regional source for CO2 to the atmosphere. The sensitivity of the processes controlling pCO2 to climatic forcing is attested to by the impact of the ENSO cycles on the sea surface pCO2, and by the apparent change in equatorial production during the last glacial period. A central goal of JGOFS Equatorial Pacific Process Study is to elucidate the links between the physical circulation and the biological and chemical processes that control the surface ocean pCO2. A crucial part of this program must be to measure the pCO2 in conjunction with the other chemical and biological measurements. pCO2, total CO2, and alkalinity of the upper ocean will be measured using proven and standard methods, on the two "survey" upper ocean JGOFS cruises. Measurement of pCO2 directly, as opposed to calculating pCO2 from other measurements, is necessary to accurately calculate air-sea fluxes. The variation of total CO2 and alkalinity will constrain the dynamics of organic carbon and calcite, respectively. The carbonate chemistry data will be incorporated into a detailed physical circulation model of the equatorial Pacific, to address questions of thermocline ventilation and the effect of nutrient utilization efficiency on atmospheric pCO2.