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

美国 JGOFS 百慕大大西洋时间序列研究 (BATS) 站点海洋二氧化碳系统的季节变化和二氧化碳海气通量的调查

• 批准号: 9416565
• 负责人: Anthony Knap
• 金额: $ 45.49万
• 依托单位: Bermuda Institute of Ocean Sciences (BIOS), Inc.
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-02-15 至 1999-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9416565&HistoricalAwards=false
• 关键词: Investigation; Seasonal; Variability; Oceanic; CO2

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.

KNAP 9416565尽管在世界海洋生物丰富的区域，海洋和大气层之间的二氧化碳交换强度可能更大，但必须考虑到生产力较低的少营养中心海洋水域在全球二氧化碳循环中的作用，因为它们的地理位置广阔。作为美国联合地球化学海洋通量研究(U.S.JGOFS)的一部分，百慕大大西洋时间序列站(BATS)的这项研究将努力研究营养稀少的北大西洋的海-空气碳动态。特别是，水柱二氧化碳逸度的高精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)碳酸盐体系平衡的组分，并允许准确计算二氧化碳通量(空气到海洋和CERSA反之)。通过这样做，研究人员预计将更准确地估计BATS站点的海-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的比较，调查人员期望更清楚地了解影响北大西洋营养不良的无机碳动态的潜在生物和物理过程，并通过外推了解其他中央海洋环流的生物和物理过程。