A Tale of Two Poles: Exploring Mixed-Phase Clouds from above and below in Greenland and Antarctica

极地地区的混合相云已被证明大大增加了地表加热，并促成了格陵兰冰盖的大规模融化事件。云可以通过许多遥感方法来表征，普遍使用激光雷达和雷达。ICESAT2卫星有一个星载激光雷达仪器，最近发布了包含大气剖面数据的数据产品ATL09。这种方法目前还没有被用于研究混合相极云。通过将卫星测量数据与在格陵兰岛和南极的地面观测数据进行比较，我们可以验证ATL09数据集，如果成功，我们可以将这些站点周围局部区域的极地混合相云观测增加到整个极地地区。从那里，我们可以尝试进一步表征云的宏观和微观物理特性，以帮助它们在气候模型中的理解和实施。

Mixed-phase clouds over the polar regions have been shown to greatly increase surface heating and have contributed to large melting events on the Greenland ice sheet. The clouds can be characterised by numerous remote sensing methods, prevalently the use of LIDAR and RADAR.The ICESAT2 satellite has a space-borne LIDAR instrument, and the data product ATL09 has recently been published containing atmospheric profile data. This hasn't currently been used to study mixed-phase polar clouds. By comparing the satellite measurements with ground based observations at Summit (Greenland) and Antarctic observatories, we can validate the ATL09 data set, and if successful, can increase our observations of polar mixed-phase clouds from the localised areas around these stations to the whole polar region. From there, we can try to further characterise the macro- and microphysical properties of the clouds, to aid in their understanding and implementation in climate models.