Cycling of Dissolved Oceanic Matter in the Equatorial Pacific

赤道太平洋溶解海洋物质的循环

• 批准号: 9115201
• 负责人: Edward Peltzer
• 金额: $ 20.84万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-10-15 至 1994-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9115201&HistoricalAwards=false
• 关键词: Cycling; Dissolved; Oceanic; Matter; Equatorial

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.

作为美国JGOFS赤道太平洋计划的一部分，溶解有机碳(DOC)和溶解有机氮(DON)将通过新的高温催化氧化技术进行测量。调查测量将提供迫切需要的数据，以约束上层海洋的碳通量模型，并确定赤道上层海洋中DOC和DON的浓度是否随季节变化。船上的培养研究将(1)尝试观察自然种群的溶解有机物的净产量，(2)测量细菌的氧化速率，以及(3)结合DOC和DON测量，确定生物不稳定材料的C/N比。溶解物质的C/N比将提供有关溶解有机碳库中生物不稳定部分的性质的迫切需要的信息。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比是否随着细菌重新矿化有机物而改变。其他实验将解决保存DOC和DON样本以供将来分析以及在存储过程中是否发生变化的问题。这些研究将与其他美国JGOFS调查人员合作进行。