Aliphatic amines in the tropical marine environment: Sources, budgets and phase partitioning phase II

热带海洋环境中的脂肪胺：来源、预算和相分配第二阶段

• 批准号: 175717069
• 负责人: Professor Dr. Hartmut Herrmann
• 金额: --
• 依托单位: Leibniz-Institut für Troposphärenforschung e.V. (TROPOS)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/175717069?language=en
• 关键词: Aliphatic; amines; tropical; marine; environment

The detection of aliphatic amines in sub-micrometer particles in the marine environment suggests that organic salt formation processes may be of significant importance for secondary organic aerosol (SOA) formation. Moreover, it is suggested that small and highly volatile amines can contribute non-negligible amounts to the nitrogen and carbon cycle in the marine environment. However, their roles in atmospheric chemistry, exact biogenic origins and the formation process are still not well known. Main aim of ALAMARE is the detection of aliphatic amines in the marine environment. By combining bulk ocean water, gas and particle phase amine measurements, we intend to obtain information of their origins and tendency to convert into the particle phase. Furthermore, the project aims on improving our understandings of the connection between the bio-productivity and the amine emission through the field measurements.During ALAMARE first results of amine analysis in aerosol samples deliver a big data set of year round abundance of amines on marine aerosol particles (years 2012 and 2013). A correlation of amines to algae pigments and amine abundance in the atmosphere was found. These results give rise to the need for a comprehensive characterisation of amine abundance regarding important biological, chemical and meteorological parameters parameters that will be performed within ALAMARE II. During ALAMARE no successful method for amine analysis in seawater could however be established. The high salt content and amine abundance in trace level concentrations require a further method development that will be the main focus of ALAMARE II. Three promising analytical techniques are available and deliver a high possibility for a successful analysis of aliphatic amines in seawater. The most suitable method, also in terms of little solvent consumption and requiring a low amount of sample, will be employed to analyse the seawater samples obtained during the intensive campaigns of ALAMARE. The final comprehensive data interpretation of aliphatic amines in the marine compartments seawater (sea surface microlayer and bulkwater), aerosol and gas phase, will help to understand phase partitioning of the amines and provide new insights in the role of amines in the marine environment.

海洋环境中亚微米颗粒中脂肪胺的检测表明，有机盐的形成过程可能对二次有机气溶胶（SOA）的形成具有重要意义。此外，还表明，小而高挥发性的胺可以对海洋环境中的氮和碳循环作出不可忽略的贡献。然而，它们在大气化学中的作用，确切的生物起源和形成过程仍然不为人所知。ALAMARE的主要目的是检测海洋环境中的脂肪胺。通过结合大量海水、气体和颗粒相胺的测量，我们打算获得它们的来源和转化为颗粒相的趋势的信息。此外，该项目旨在通过实地测量提高我们对生物生产力与胺排放之间关系的理解。在ALAMARE期间，气溶胶样品中胺分析的初步结果提供了海洋气溶胶颗粒全年胺丰度的大数据集（2012年和2013年）。发现了藻类色素与大气中胺丰度的相关性。这些结果表明需要对重要的生物、化学和气象参数进行全面的胺丰度表征，这些参数将在ALAMARE II中进行。然而，在ALAMARE期间，没有建立成功的海水胺分析方法。高盐含量和微量水平浓度的胺丰度需要进一步的方法开发，这将是ALAMARE II的主要重点。三种有前途的分析技术是可用的，并提供了很大的可能性成功分析海水中的脂肪胺。在ALAMARE密集活动期间，将采用最合适的方法分析获得的海水样品，同时也考虑到溶剂消耗少、样本量少。最终对海洋隔间海水（海面微层和船体水）、气溶胶和气相中脂肪族胺的综合数据进行解释，将有助于了解胺的相分配，并为胺在海洋环境中的作用提供新的见解。