SGER: VOCALS--The Influence of Continental Aerosols on Stratocumulus Clouds

在美洲季风系统变率（VAMOS）海洋-云-大气-陆地研究区域实验（VOCALS-REx）的框架下，本项目将研究东南太平洋智利沿海受大陆空气污染影响的层积云（Sc）云层的微物理特征变化。一套完整的对流层气溶胶仪器将于2008年10月在智利偏远的帕波索村部署。本探索性研究旨在将陆地上实测的气溶胶原位化学成分、总柱气溶胶光学特性和原位气溶胶微物理特性与海洋边界层动力学结构以及Sc层与海岸外污染空气相互作用过程中Sc层的微物理结构变化联系起来。将进行一系列测量，以确定近海大陆气溶胶是如何被带入MBL的，以及如何使用偏振激光雷达测量来确定Sc云层中引起的微物理结构变化。该项目将探索偏振激光雷达在确定气溶胶特性方面的能力。它必须在2008年10月进行，因为只有在VOCALS野外活动期间，远程野外地点才可用。此外，在这个项目下尝试的测量价值将大大提高，因为它们与其他研究人员在现场以及在VOCALS REx期间在海上进行的测量结果相吻合。该项目更广泛的影响在于它对整个VOCALS-REx数据集的贡献。该项目将通过本科生研究经验和阿拉斯加费尔班克斯大学北极地区超级计算中心暑期实习项目，为本科生提供气溶胶物理、环境化学和光学遥感方面的培训。

In the framework of the Variability of the American Monsoon Systems (VAMOS) Ocean-Cloud-Atmosphere-Land Study Regional Experiment (VOCALS-REx), this project will study the changes in the microphysical characteristics of the Stratocumulus (Sc) cloud layer off the coast of Chile in the Southeast Pacific, which is under the influence of polluted continental air. A complete set of tropospheric aerosol instruments at the land-ocean boundary will be deployed at the remote village of Paposo in Chile during October 2008. This exploratory research aims to connect the in-situ chemical composition of aerosols, the total column aerosol optical properties, and in situ aerosol microphysical characteristics measured on land with the MBL (Marine Boundary Layer) dynamical structure and the microphysical and structural changes of the Sc layer during the interaction of the Sc with the polluted air flowing off the coast. A suite of measurements will be made to determine how the off-shore continental aerosols are entrained in the MBL, and how microphysical-structural changes induced in the Sc cloud layer can be determined using polarimetric lidar measurements. This project will explore the capabilities of polarimetric lidar in determining aerosol properties. It must be carried out in October 2008, as it is only during the VOCALS field campaign that the remote field site will be available. Moreover, the value of the measurement attempted under this project will be greatly enhanced by their coincidence with the measurements to be made by other investigators at the field site as well as those made offshore during VOCALS REx.Broader impacts of this project are in its contributions to the overall VOCALS-REx dataset. The project will provide training for undergraduate students in aerosol physics, environmental chemistry, and optical remote sensing via the Research Experience for Undergraduates and the Arctic Region Supercomputing Center summer internship programs at the University of Alaska Fairbanks.