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

将测量作为AEROCE标准方案的一部分在所有主要和次要站点收集的所有气溶胶样品中的210Pb和7Be的浓度，以及每月向所有主要和次要站点的210Pb和7Be的沉积通量。这些核素的来源众所周知，而且不发生化学转化。有4个目标：1)观测到的这些核素的浓度和沉积将用于测试和改进大气输送的事件导向和气候学数值模式。2)放射性核素与其他物种之间的相关性将用于推断其他物种的来源以及来源或运输的季节变化。3)沉积速率与地表空气浓度之比将用于测量气溶胶向地表的转移速率。4) 7Be/210Pb比值将作为对流层垂直混合和气溶胶去除高度的潜在测量。

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.