Tracing the Origin and Measuring the Deposition of Aerosols Over the North Atlantic Ocean Through the Use of 210Pb and 7Be

210 Pb和7 Be的浓度测量 作为标准AEROCE协议的一部分收集的气溶胶样品 在所有主要和次要地点， 210 Pb和7 Be的通量到所有主要和次要站点将是 进行。 这些核素有众所周知的来源， 经历化学转变。 有四个目标：（1） 观测到的这些核素的浓度和沉积将 用于测试和完善事件导向和气候 大气传输的数值模型。 2)的相关性 放射性核素和其他物种之间的关系将被用来推断 其他物种的来源和季节变化， 来源或运输。 3)沉积速率与表面的比值 空气浓度将用于测量 气溶胶到地面。 4)将跟踪7 Be/210 Pb比值 作为一个潜在的措施， 对流层和气溶胶去除的高度。

Measurements of the concentration of 210Pb and 7Be in all aerosol samples collected as part of the standard AEROCE protocol at all primary and secondary sites and the monthly deposition flux of 210Pb and 7Be to all primary and secondary sites will be conducted. These nuclides have well-known sources and do not undergo chemical transformations. There are 4 objectives: 1) The observed concentrations and deposition of these nuclides will be used to test and refine both event-oriented and climatological numerical models of atmospheric transport. 2) The correlations between the radionuclides and other species will be used to infer the sources of the other species and of seasonal changes in source or transport. 3) The ratio of deposition rate to surface air concentration will be used to measure the transfer rate of aerosols to the surface. 4) The 7Be/210Pb ratio will be tracked as a potential measure of both the vertical mixing in the troposphere and the altitude of aerosol removal.