Temperature dependence of precipitating ice particle number concentrations of 
Arctic mixed-phase clouds observed by continuous ground-based measurements

Koike, Makoto; Saito, Temma; Tobo, Yutaka; Ebell, Kerstin; Moteki, Nobuhiro; Ohata, Sho; Mori, Tatsuhiro; Yoshida, Atsushi; Adachi, Kouji; Baumgardner, Darrel; Ong, Chia Rui; Hashino, Tempei

doi:10.57757/IUGG23-2147

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Temperature dependence of precipitating ice particle number concentrations of Arctic mixed-phase clouds observed by continuous ground-based measurements

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

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

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

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

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

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

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

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

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

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

Ong, Chia Rui
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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

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Citation

Koike, M., Saito, T., Tobo, Y., Ebell, K., Moteki, N., Ohata, S., Mori, T., Yoshida, A., Adachi, K., Baumgardner, D., Ong, C. R., Hashino, T. (2023): Temperature dependence of precipitating ice particle number concentrations of Arctic mixed-phase clouds observed by continuous ground-based measurements, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-2147

Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018673

Abstract

Arctic low level clouds are considered to play a significant role in the Arctic climate system. In this study, we examined a temperature dependence of precipitating ice particle number concentrations of Arctic mixed-phase clouds observed by continuous ground-based in situ measurements. Precipitating particles were measured using an optical disdrometer (MPS, DMT Inc.) at Mt. Zeppelin Observatory in Ny-Alesund (78.9N, 11.9E), Svalbard between years of 2016 and 2020. Based on ground-based cloud radar and lidar observations, we selected a single layer mixed-phase cloud whose cloud-top height was less than 2.5 km. For the ice nucleating particles number concentration (N_INP), we adopted typical number concentrations observed at Mt. Zeppelin. Because N_INP depends on temperature, we used the value corresponding to the cloud-top temperature. As a result, number concentration fluxes of precipitation particles (F_ice) tended to increase with decreasing temperature below approximately -15°C and they agreed with F_INP within one order of magnitude. On the other hand, at temperatures above -10°C, F_ice was several orders of magnitude higher than F_INP.In this paper, we discuss possible reasons for these temperature dependences of F_ice.