Determination of Regional- and Global-Scale New Production, Remineralization Rates and DOC Fluxes from the Annual Cycle of Oxygen in the Upper Ocean

海洋科学家无法直接测量许多重要的生物地球化学参数，如新产量和再矿化作用，特别是在区域和全球范围内。国家海洋学数据中心（National Oceanographic data Center，简称NODC）现有的氧数据，由PI、Najjar及其同事最近进行的分析表明，在全球范围内，存在显著的氧年循环。在海洋中，没有任何一种化学物质像氧气那样被广泛测量，而氧气的循环可以提供有关有机碳循环的重要信息。在该提案中，Najjar建议使用气候氧数据，结合三维海洋生物地球化学模型，量化区域和全球尺度的新产量，再矿化和DOC循环估算。将测试改进的生物地球化学模型，并计划更新和修订NODC氧气数据集。这种方法还将包括对氧场和由此产生的通量的误差分析。这一建议的结果将代表我们对大尺度海洋生物地球化学过程的理解取得重大进展，从而促进我们对这些过程与全球变化之间关系的理解。* * *

Najjar (OCE-9711937) Najjar 9711937 Marine scientists are hampered by their ability to directly measure many important biogeochemical parameters such as new production and remineralization, particularly on regional and global scales. Recent analyses by the PI, Najjar, and colleagues of existing oxygen data archived at the National Oceanographic Data Center (NODC) show that there are significant annual cycles of oxygen that can be resolved on a global scale. No other chemical species has been measured as extensively in the oceans as oxygen has, and the cycling of oxygen can yield significant information about organic carbon cycling. In this proposal, Najjar proposes to use the climatological oxygen data, combined with a three dimensional marine biogeochemical model, to quantify regional and global scale estimates of new production, remineralization and DOC cycling. Improved biogeochemical models will be tested and updating and revisions to the NODC oxygen data set are planned. This approach will also include an error analysis of the oxygen field and resulting fluxes. The results from this proposal will represent a significant advance in our understanding of marine biogeochemical processes on large scales and thus advance our understanding of how these processes relate to global change. ***