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，将在北大西洋海洋边界层的三个地点每天采集降水样本。样品的主要化学成分将被分析，所产生的数据将与作为该计划的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解释，以解决以下科学目标：1)确定主要S和N物种对NAO的干湿沉降通量；2)区分主要S和N物种的自然和人为来源，作为季节、年份和天气状况的函数；3)评估降水对颗粒物和气相清除的相对重要性；以及4)调查大气沉积对海洋生产力的影响。这项研究的结果将有助于发展通过NAO对流层的主要和微量化学物种的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.