Investigation of the Seasonal Variability of the Oceanic CO2 System and the Air-Sea Flux of CO2 at the U.S. JGOFS Bermuda Atlantic Time-Series Study (BATS) Site

虽然在世界海洋生物丰富的地区，海洋和大气之间的二氧化碳交换强度可能更大，但由于其地理上的广阔，必须考虑到生产力较低的贫营养中央海洋水域在全球二氧化碳循环中的作用。作为美国联合海洋地球化学通量研究（U.S. JGOFS）的一部分，这项在百慕大大西洋时间序列站（BATS）进行的研究将努力研究北大西洋少营养化海域的海洋-空气碳动态。特别地，高精度的水柱CO2逸度连续时间序列测量（海水中二氧化碳理想分压的测量）将被添加到BATS已经进行的测量中，以过度确定（即，提供内部一致性检查）碳酸盐系统平衡的组成部分，并允许精确计算二氧化碳通量（空气到海洋，反之亦然）。通过这样做，研究人员希望更准确地估计BATS站点的海洋-空气二氧化碳通量，并减少北大西洋作为大气二氧化碳汇的作用的不确定性。通过与BATS的其他时间序列数据进行比较，研究人员希望更清楚地了解影响北大西洋贫营养区无机碳动态的潜在生物和物理过程，并通过外推，在其他中央海洋环流中。

Knap 9416565 Although the intensity of carbon dioxide exchange between the ocean and atomsphere may be more greater in biologically rich areas of the world ocean, the role of the less productive oligotrophic central ocean waters in the global carbon dioxide cycle must be taken into account because of their geographic vastness. As part of the U.S. Joint Geochemical Ocean Flux Study (U.S. JGOFS), this study at the Bermuda Atlantic Time-series Station (BATS) will endeavor to study sea-air carbon dynamics in the oligotrophic North Atlantic. Specially, high-precision continuos time-series measurements of water column CO2 fugacity (a measure of ideal partial pressure of carbon dioxide in seawater) will be added to the measurements already being made at BATS to overdetermine (i.e., provide a check of internal consistency) the components of the carbonate system equilibrium and permit accurate calculation of carbon dioxide fluxes (air to sea and vice cersa). In so doing, the investigators expect to more accurately estimate the sea-air flux of CO2 at the BATS site and to reduce uncertainties in the role of the North Atlantic as a sink for atmospheric carbon dioxide. Through comparison with other time-series data at BATS, the investigators expect to achieve a clearer understanding of the underlying biological and physical processes impacting the dynamics of inorganic carbon in the oligotrophic North Atlantic, and by extrapolation, in other central ocean gyres.