N - Isotopes of Ammonia and Ammonium in and over the Atlantic (NISAAA)

N - 大西洋内外的氨和铵的同位素 (NISAAA)

• 批准号: 403651491
• 负责人: Dr. Jens Dyckmans
• 金额: --
• 依托单位: Abteilung Bioklimatologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/403651491?language=en
• 关键词: Isotopes; Ammonia; Ammonium; over; Atlantic

N-transfer rates in the boundary layer between atmosphere and ocean play a critical role to understand global life processes and their development. The ratio of stable isotopes of N2 and nitrate were mainly used to understand transfer rates and transfer mechanisms of nitrogen compounds. We want to determine isotope ratios of atmospheric ammonia over the ocean for the first time and in conjunction N - isotope ratios in particulate ammonium, in order to evaluate sources, transports, transformations and sinks of atmospheric NH3. Isotope ratios of NH4+ and of physically dissolved NH3 x H2O in the surface water of the Atlantic will be determined to relate ocean and atmospheric NH3. On a meridional transection from 80° north to 70° south RV "Polarstern" will traverse representative maritime provinces and air-mass zones, so that a first impression can be gained on the distribution of N - isotopes in ammonia and ammonium. New constraining barriers can thus be set up with isotope ratios of N-NH3 and NH4+ for cycles and models of N - components in the earth system.

大气和海洋之间边界层的氮转移速率对于了解全球生命过程及其发展起着至关重要的作用，氮和硝酸盐的稳定同位素比率主要用于了解氮化合物的转移速率和转移机制。首次测定海洋上空大气氨的同位素比，并结合颗粒铵中的 N-同位素比，以评估大气氨的来源、传输、转化和汇。将确定大西洋地表水中 NH4+ 和物理溶解的 NH3 x H2O 的同位素比率，以将海洋和大气 NH3 联系起来。 在从北纬 80° 到南纬 70° 的经向横断面上，RV“Polarstern”将穿越代表性的海洋省份和地区。气团区域，以便可以对氨和铵中 N 同位素的分布获得第一印象，从而可以设置新的约束屏障。与 N-NH3 和 NH4+ 的同位素比率一起用于地球系统中 N 成分的循环和模型。