Lidar measurements of aerosol impacts, transport and mixing on Earth and Mars

达尔豪西大学的大气光学实验室建立并使用激光雷达(激光雷达)系统进行大气研究。我们的计划分为三个主要项目：1)达尔豪西拉曼激光雷达观测大陆污染和森林火灾的外流。3)气溶胶被用作大气运动的被动跟踪器，并在模型的帮助下进行解释，以洞察输送和混合过程。2)国际极年(IPY)期间及以后，将在尤里卡的高北极地区进行大气研究，作为加拿大大气变化探测网络(CANDAC)的一部分。*正在建造一个新的激光雷达来研究云的影响，气溶胶和水蒸气对辐射环境的影响，这是气候问题的核心。3)凤凰号火星侦察项目，将于2008年在火星上着陆激光雷达。这些测量将提供关于火星大气中气溶胶和云的垂直分布的独特信息。达尔豪西拉曼激光雷达是从零开始建造的，在过去的两年里用于观测。这些测量突出了从远处输送的污染事件的规律性发生，以及森林火灾将气溶胶注入对流层高空。我们建议通过增加水蒸气廓线功能来升级激光雷达，这将提供在边界层和对流层顶高度发生的更清晰的图像。来自密集夏季测量活动的所有数据将借助FLEXPART拉格朗日粒子扩散模型进行解释。尤里卡的新激光雷达的建造将基于我们使用达尔豪西拉曼激光雷达的经验，并将拥有更广泛的一套能力。这项工作将需要前往北极，并为CANDAC云、气溶胶和辐射主题做出贡献。这些学生将参与每一项活动的方方面面。

The Atmospheric-Optics Laboratory at Dalhousie University builds and uses lidar (laser radar) systems for atmospheric research.  Our programme is divided into three main projects: 1) The Dalhousie Raman Lidar observes continental outflow from pollution and forest fires.  The aerosols are used as passive tracers of atmospheric motions and are interpreted with the help of models to gain insight into transport and mixing processes.  2) Atmospheric research will be pursued in the High Arctic at Eureka during the International Polar Year (IPY) and beyond as part of the Canadian Network for the Detection of Atmospheric Change (CANDAC).  A new lidar is being built to study the impact of clouds, aerosols, and water vapour on the radiative environment, which is central to the climate problem.  3) The Phoenix Mars Scout project that will land a lidar on Mars in 2008.  These measurements will provide unique "first-time" information on the vertical distribution of aerosols and clouds in the Martian atmosphere. The Dalhousie Raman Lidar was built from scratch and then used for observations over the past two years.  The measurements have highlighted the regular occurrence of pollution episodes transported from distant sources, and also the injection of aerosols high into the troposphere by forest fires.  We propose to upgrade the lidar by the adding a water vapour profiling capability, which will provide a clearer picture of what is happening in the boundary layer and at tropopause heights.  Data from intensive summertime measurement campaigns will be interpreted with the aid of the FLEXPART Lagrangian particle dispersion model.  Construction of the new lidar for Eureka will be based on our experiences with the Dalhousie Raman lidar, and will have a more extensive set of capabilities.  The work will require travel to the Arctic and contributions to the CANDAC Clouds, Aerosols and Radiation Theme.  Students will be involved in every facet of each of these activities.