Aerosol and Cloud Chemistry at El Yunque Peak in Puerto Rico

波多黎各东端的El Yunque峰（海拔1067 m）经常处于云层中，因此可以方便地从地面平台采样云水和气溶胶，避免了空中采样的成本和复杂性。这些云的地形性质使我们能够建立云前和云后气溶胶组成与云水组成之间的经验关系，从而为更好地理解云化学提供了可能。在El Yunque对气溶胶和云水进行取样和化学分析是拟议研究的主要组成部分。在El Yunque站点，将收集云水、间隙气溶胶和总（云+间隙）气溶胶。还将分析云水和水溶性气溶胶的阴离子和阳离子。过滤样品将分析微量元素、总碳和黑碳。

El Yunque peak (elevation 1067 m) at the eastern end of Puerto Rico is frequently in clouds, so that cloud water and aerosols can be conveniently sampled from a ground-based platform, avoiding the cost and complexities of airborne sampling. The orographic nature of these clouds enables the establishment of empirical relations between the composition of pre-cloud and after-cloud aerosols and the composition of the cloud water, and therefore offers a potential for a better understanding of cloud chemistry. Sampling and chemical analyses of aerosols and cloud water at El Yunque constitute the main component of the proposed research. At the El Yunque site, cloud water, interstitial aerosols, and total (cloud + interstitial) aerosols will be collected. Cloud water and water-soluble aerosols will also be analyzed for anions and cations. Filter samples will be analyzed for trace elements, total carbon, and black carbon.