The importance of Aitken mode aerosol particles for cloud sustenance in the summertime high Arctic – a simulation study supported by observational data
Abstract
The potential importance of Aitken mode particles (diameters ~ 25–80 nm) for stratiform mixed-phase clouds in the summertime high Arctic (>80° N) has been investigated using two large-eddy simulation models. We find that, in both models, Aitken mode particles significantly affect the simulated microphysical and radiative properties of the cloud and can help sustain the cloud when accumulation mode concentrations are low (< 10–20 cm–3), even when the particles have low hygroscopicity (hygroscopicity parameter – κ=0.1). However, the influence of the Aitken mode decreases if the overall liquid water content of the cloud is low, either due to a higher ice fraction or due to low radiative cooling rates. An analysis of the simulated supersaturation (ss) statistics shows that the ss frequently reaches 0.5 % and sometimes even exceeds 1 %, which confirms that Aitken mode particles can be activated. The modelling results are in qualitative agreement with observations of the Hoppel minimum obtained from four different expeditions in the high Arctic. Our findings highlight the importance of better understanding Aitken mode particle formation, chemical properties and emissions, particularly in clean environments such as the high Arctic.
- Authors:
-
[1];
[2];
[3];
[1]
- Stockholm Univ. (Sweden); Bolin Centre for Climate Research, Stockholm (Sweden)
- Univ. of California, Davis, CA (United States)
- Stockholm Univ. (Sweden); Leibniz Inst. for Tropospheric Research (ITR), Leipzig (Germany)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Atmospheric Radiation Measurement (ARM) Data Center
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER); Swedish Research Council (SRC)
- Contributing Org.:
- PNNL, BNL, ANL, ORNL
- OSTI Identifier:
- 1772900
- Grant/Contract Number:
- SC0019073; 2016-07213
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Atmospheric Chemistry and Physics (Online)
- Additional Journal Information:
- Journal Name: Atmospheric Chemistry and Physics (Online); Journal Volume: 21; Journal Issue: 5; Journal ID: ISSN 1680-7324
- Publisher:
- Copernicus Publications, EGU
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES
Citation Formats
Bulatovic, Ines, Igel, Adele L., Leck, Caroline, Heintzenberg, Jost, Riipinen, Ilona, and Ekman, Annica L. The importance of Aitken mode aerosol particles for cloud sustenance in the summertime high Arctic – a simulation study supported by observational data. United States: N. p., 2021.
Web. doi:10.5194/acp-21-3871-2021.
Bulatovic, Ines, Igel, Adele L., Leck, Caroline, Heintzenberg, Jost, Riipinen, Ilona, & Ekman, Annica L. The importance of Aitken mode aerosol particles for cloud sustenance in the summertime high Arctic – a simulation study supported by observational data. United States. https://doi.org/10.5194/acp-21-3871-2021
Bulatovic, Ines, Igel, Adele L., Leck, Caroline, Heintzenberg, Jost, Riipinen, Ilona, and Ekman, Annica L. Mon .
"The importance of Aitken mode aerosol particles for cloud sustenance in the summertime high Arctic – a simulation study supported by observational data". United States. https://doi.org/10.5194/acp-21-3871-2021. https://www.osti.gov/servlets/purl/1772900.
@article{osti_1772900,
title = {The importance of Aitken mode aerosol particles for cloud sustenance in the summertime high Arctic – a simulation study supported by observational data},
author = {Bulatovic, Ines and Igel, Adele L. and Leck, Caroline and Heintzenberg, Jost and Riipinen, Ilona and Ekman, Annica L.},
abstractNote = {The potential importance of Aitken mode particles (diameters ~ 25–80 nm) for stratiform mixed-phase clouds in the summertime high Arctic (>80° N) has been investigated using two large-eddy simulation models. We find that, in both models, Aitken mode particles significantly affect the simulated microphysical and radiative properties of the cloud and can help sustain the cloud when accumulation mode concentrations are low (< 10–20 cm–3), even when the particles have low hygroscopicity (hygroscopicity parameter – κ=0.1). However, the influence of the Aitken mode decreases if the overall liquid water content of the cloud is low, either due to a higher ice fraction or due to low radiative cooling rates. An analysis of the simulated supersaturation (ss) statistics shows that the ss frequently reaches 0.5 % and sometimes even exceeds 1 %, which confirms that Aitken mode particles can be activated. The modelling results are in qualitative agreement with observations of the Hoppel minimum obtained from four different expeditions in the high Arctic. Our findings highlight the importance of better understanding Aitken mode particle formation, chemical properties and emissions, particularly in clean environments such as the high Arctic.},
doi = {10.5194/acp-21-3871-2021},
journal = {Atmospheric Chemistry and Physics (Online)},
number = 5,
volume = 21,
place = {United States},
year = {Mon Mar 15 00:00:00 EDT 2021},
month = {Mon Mar 15 00:00:00 EDT 2021}
}
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