The Arctic Facility for Atmospheric Remote Sensing for Research and Training

该项目通过由阿拉斯加费尔班克斯大学运营的北极大气遥感设施（AFARS）进行的观测，重点关注高纬度云和气溶胶特性。AFARS支持两个偏振激光雷达，一个偏振多普勒w波段雷达，以及一套紫外、可见光和红外辐射计。研究人员将使用这些仪器，以及云微物理模型和来自A-train星座的卫星测量，来：1)表征北极中高层云的宏观物理和微观物理特性，并将其与中纬度云进行比较；2)研究气溶胶入侵北极，并通过多波长退极化方法改进其表征；3)研究最近发现的气溶胶，如输送的亚洲尘埃、火山尘埃和森林火灾烟雾；4)结合偏振激光雷达和偏振多普勒雷达研究降水物理5)测试卫星方法表征观测到的云和气溶胶的能力这项活动的智力价值来自于在环境至关重要但采样不足的北极地区使用地面遥感和卫星观测相结合的特征云和气溶胶。这项活动的广泛影响将分别集中在研究生和博士后研究人员的教育和持续的职业发展上。此外，这项工作的结果对于了解高纬度地区云量和云微物理性质变化的气候变化反馈具有潜在的重要意义。

This project focuses on high-latitude cloud and aerosol properties via observations conducted at the Arctic Facility for Atmospheric Remote Sensing (AFARS), operated by the University of Alaska Fairbanks. AFARS supports of two polarization lidars, a polarimetric Doppler W-band radar, and a suite of ultraviolet, visible, and infrared radiometers. Researchers will use these instruments, along with cloud microphysical models and satellite measurements from the A-train constellation, to: 1) Characterize the macrophysical and microphysical properties of mid and high level clouds in the Arctic and compare them to midlatitude clouds 2) Study aerosol intrusions into the Arctic and improve their characterization through multi-wavelength depolarization methods 3) Study recent findings that aerosols, such as transported Asian dust, volcanic dust, and forest fire smoke, are indirectly affecting clouds 4) Combine polarization lidar and polarimetric Doppler radar to study precipitation physics 5) Test the ability of satellite methods to characterize the observed clouds and aerosolsThe intellectual merit of this activity comes through use of a combination of ground-based remote sensing and satellite-based observations in characterized clouds and aerosols in the environmentally critical yet under-sampled Arctic region.The broader impacts of this activity will center on the education and continued career development of a graduate student and post-doctoral researcher, respectively. Additionally, results from this work are potentially important for understanding climate change feedbacks involving alterations in cloud cover and cloud microphysical properties in high-latitude regions.