Low-level Arctic clouds: The hidden key component of the radiation budget ...

• Main Authors: Griesche, Hannes, Barrientos-Velasco, Carola, Deneke, Hartwig, Hühnerbein, Anja, Seifert, Patric, Macke, Andreas
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Arctic; Sea ice
• Online Access: https://dx.doi.org/10.57757/iugg23-0846; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016635

<!--!introduction!--> To understand the feedbacks driving the amplified changes in the Arctic a quantification of the contribution of the involved processes is necessary. Here a detailed study of low-level Arctic clouds on the surface radiation budget is presented. These clouds frequently occur below the lowest detection range of most state-of-the-art remote-sensing instruments and were observed in summertime during 25% of the time over the marginal sea ice zone. The low altitude of these clouds poses challenges on their observation and characterization by remote-sensing techniques. Ground-based remote sensing and surface radiation flux measurements performed during the Arctic cruise PS106 in 2017 were combined with radiative transfer simulations to study low-level clouds. A multiwavelength lidar Polly XT with near-range observations capabilities down to 50m and a cloud radar with a lowest detection limit at 165m altitude were operated continuously. The liquid-water microphysical properties of clouds ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...