Clear evidence for the impact of wildfire smoke on cirrus formation ...

• Main Authors: Ansmann, Albert, Ohneiser, Kevin, Engelmann, Ronny, Seifert, Patric, Mamouri, Rodanthi-Elisavet, Ene, Dragos, Nisantzi, Argyro
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Arctic
• Online Access: https://dx.doi.org/10.57757/iugg23-0554; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016966

<!--!introduction!--> From 27 October to 1 November 2020 we observed aged wildfire smoke layers from 10-11.5 km height with a multiwavelength Raman lidar at Limassol, Cyprus, continuously over 6 days. Aged smoke particles consist mainly of organic material. On all days, ice nucleation occurred just above the base of the smoke layer at temperatures around -50°C. The ice crystals grew fast and formed strong virga in clean air below the smoke layers. The observed smoke and cirrus features clearly indicates where the ice nucleation occurred. During the MOSAiC (Multidisciplinary drifting Observatory for the Study of Arctic Climate) expedition the German icebreaker Polarstern with a multiwavelength Raman lidar aboard drifted through the pack ice at latitudes from 85°-88.5°N from October 2019 to March 2020. During this period a wildfire smoke layer originating from record-breaking Siberian fires in the summer of 2019 and cirrus layers were continuously observed with the our lidar and a cloud radar of the ARM ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...