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-海洋边界层中的氮迁移速率对于理解全球生命过程及其发展起着至关重要的作用。N2和硝酸盐的稳定同位素比值主要用于了解氮化合物的迁移速率和迁移机制。我们希望首次确定海洋上空大气氨的同位素比值，并结合颗粒态氨的N -同位素比值，以评估大气NH3的来源、输送、转化和汇。NH 4+和物理溶解的NH3 × H2O在大西洋的地表水的同位素比将被确定为与海洋和大气中的NH3。在从北纬80°到南纬70°的纬向断面上，RV“Polarstern”将穿越代表性的海洋省份和气团区，以便对氨和铵中的N -同位素分布获得初步印象。N-NH_3和NH_4 ~+同位素比值可为地球系统中N -组分的旋回和模式建立新的制约屏障。