Sulfur and Nitrogen in Wet Deposition of the North Atlantic Ocean: Sources, Scavenging Processes, Trends, and Impacts

作为大气/海洋化学实验（AEROCE）的一部分，将在北大西洋（NAO）海洋边界层的三个地点每天取样降水。将对样品进行主要化学成分分析，并将结果数据与作为该计划一部分或与该计划合作产生的其他化学和气象数据集一起进行解释，以实现以下科学目标：1)确定主要S和N物种向NAO的湿沉降通量和干沉降通量；2)根据季节、年份和天气情况区分主要S和N种的自然来源和人为来源；3)评估通过降水清除颗粒物与气相的相对重要性；4)研究大气沉降对海洋生产力的影响。研究结果将有助于建立通过NAO对流层进行主要和痕量化学物质生物地球化学循环的预测能力。

Precipitation will be sampled on a daily basis at three sites in the marine boundary layer of the North Atlantic Ocean (NAO) as part of the Atmosphere/Ocean Chemistry Experiment (AEROCE). Samples will be analyzed for major chemical constituents and resulting data will be interpreted in conjunction with other chemical and meteorological data sets generated as part of, or in collaboration with, the program to address the following scientific objectives: 1) determine the wet and dry deposition fluxes of major S and N species to the NAO; 2) differentiate natural from anthropogenic sources for major S and N species as a function of season, year and synoptic situation; 3) assess the relative importance of particulate- versus vapor-phase scavenging by precipitation; and 4) investigate the impact of atmospheric deposition on marine productivity. Results of this study will contribute to the development of a predictive capability for the biogeochemical cycling of major and trace chemical species through the NAO troposphere.