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Effects of long range transported wildfire plume on cloud microphysics in Northern Europe and the high Arctic

Authors

Virtanen,  Annele
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Kommula,  Snehitha
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Gramlich,  Yvette
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Mielonen,  Tero
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Buchholz,  Angela
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Koike,  Makoto
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Yoon,  Young Jun
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Heslin- Rees,  Dominic
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Zieger,  Paul
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Krejci,  Radovan
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Mohr,  Claudia
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Romakkaniemi,  Sami
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Citation

Virtanen, A., Kommula, S., Gramlich, Y., Mielonen, T., Buchholz, A., Koike, M., Yoon, Y. J., Heslin- Rees, D., Zieger, P., Krejci, R., Mohr, C., Romakkaniemi, S. (2023): Effects of long range transported wildfire plume on cloud microphysics in Northern Europe and the high Arctic, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-3995


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019822
Abstract
Extreme weather conditions and widespread drying induced by climate change will increase the risk and severity of wildfires increasing the importance of the wildfire emissions in the climate system. Aerosol emissions from the wildfires may affect the cloud formation by increasing the concentration of cloud condensation nuclei (CCN) and by affecting the composition and hygroscopicity (k) of the aerosol population. In this study, we investigate the effect of long range transported (originated from South-Eastern Europe) wildfire plume on cloud microphysics at two sites: Puijo SMEAR IV in Eastern Finland, and Zeppelin Observatory in Svalbard, high Arctic. We use both in-situ and satellite observations to investigate the changes in aerosol population, cloud activation and cloud properties.During the wildfire plume period, the aerosol hygroscopicity slightly increased compared to clean periods at Puijo station, but decreased at Zeppelin. A substantial increase in aerosol number concentration in the accumulation mode size range was observed at both stations. Despite the increase in k, the increase in critical diameter for activation was observed as the water supersaturation was decreased due to increased aerosol concentration at Puijo station. A substantial increase in CCN concentration and cloud droplet number concentration (CDNC) was observed based on in-situ observations at both stations during the wildfire plume period. Also satellite observations revealed a comparable change in CDNC and cloud optical thickness over Puijo station. Our results demonstrate that the long range transported (3-5 days) wildfire plume can significantly affect cloud formation in environments where the background concentrations are relatively low.