Nitrogen Dynamics Within Two International Southern Ocean JGOFS Cruises

两艘国际南大洋 JGOFS 游轮内的氮动态

• 批准号: 9116872
• 负责人: Walker Smith
• 金额: $ 29.98万
• 依托单位: University of Tennessee Knoxville
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-06-15 至 1996-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9116872&HistoricalAwards=false
• 关键词: Nitrogen; Dynamics; Within; Two; International

The Southern Ocean is recognized as a critical region with regard to its oceanic productivity and global carbon dioxide balance. The region is known to be elevated in nutrients year-round, but extreme temporal and spatial variability on all scales is observed in the productivity. This project will focus on nitrogen dynamics, with an emphasis on new production, that photosynthetic production or organic material based on nitrate as a nitrogen source. Environmental factors controlling new production appear to be different in the Antarctic compared to temperate seas. Experiments aim to determine the relationship between new production and various factors such as irradiance, heterotrophic use of reduced nitrogen compounds, and concentrations of urea and ammonia. The research will be conducted on two international, multidisciplinary cruises on British and French ships. The collaboration with international scientists provides an excellent opportunity to advance this field.

就其海洋生产力和全球二氧化碳平衡而言，南大洋被认为是关键地区。 已知该地区全年养分升高，但是在生产力中观察到所有尺度上的极端时间和空间变异性。 该项目将着重于氮动力学，重点是新产生，即基于硝酸盐作为氮源的光合作用或有机材料。 与温带海洋相比，控制新产量的环境因素在南极似乎有所不同。 实验旨在确定新生产与各种因素之间的关系，例如辐照度，氮化合物降低的异养和使用，以及尿素和氨的浓度。该研究将对两次国际跨学科巡游进行对英国和法国船的进行。与国际科学家的合作为推进这一领域提供了绝佳的机会。