Cycling of Dissolved Oceanic Matter in the Equatorial Pacific

溶解有机碳（DOC）和溶解有机质 氮（DON）将通过新的高温测量 催化氧化技术作为美国JGOFS的一部分 赤道太平洋计划。 测量结果将提供 迫切需要的数据，以约束上层海洋模型， 碳通量，并确定DOC和DON浓度 在赤道的上层海洋季节性变化。 船上 孵化研究将（1）试图观察净产量 溶解有机物的自然种群，（2）措施 细菌氧化速率和（3）通过DOC和DON组合 测量，确定生物学的C/N比， 不稳定材料 溶解物质的C/N比将 提供关于以下方面的迫切需要的信息： 溶解有机物中的生物不稳定部分 碳库 巡航后的孵化研究将着眼于 DOC和DON的长期稳定性以及C/N比是否 随着细菌分解有机物而发生变化。 额外 实验将解决保存DOC和DON样本的问题 以便将来进行分析以及在存储期间是否发生变化。 这些研究将与其他研究合作进行。 美国JGOFS调查员。

Both dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) will be measured by the new high-temperature catalytic oxidation technique as part of the U.S. JGOFS Equatorial Pacific Program. Survey measurements will provide critically needed data for constraining upper ocean models of the carbon flux and to determine if DOC and DON concentrations vary seasonally in the upper ocean at the equator. On board incubation studies will (1) attempt to observe net production of dissolved organic matter by natural populations, (2) measure bacterial oxidation rates and (3) by combining DOC and DON measurements, determine the C/N ratio of the biologically labile material. The C/N ratio of the dissolved material will provide critically needed information regarding the nature of the biologically labile fraction of the dissolved organic carbon pool. Post-cruise incubation studies will look at long-term stability of DOC and DON and whether the C/N ratio changes as bacteria remineralize organic matter. Additional experiments will address problems of saving DOC and DON samples for future analysis and whether changes occur during storage. These studies will be conducted in collaboration with other U.S. JGOFS investigators.