Publication Abstracts
Williams et al. 2024
Williams, A.S., J.L. Dedrick, L.M. Russell, , I. Silber, , B. Swanson, P.J. DeMott, P. Zieger, and R. Krejci, 2024: Aerosol size distribution properties associated with cold-air outbreaks in the Norwegian Arctic. Atmos. Chem. Phys., 24, no. 20, 11791-11805, doi:10.5194/acp-24-11791-2024.
The aerosol particles serving as cloud condensation and ice nuclei contribute to key cloud processes associated with cold-air outbreak (CAO) events but are poorly constrained in climate models due to sparse observations. Here we retrieve aerosol number size distribution modes from measurements at Andenes, Norway, during the Cold-Air Outbreaks in the Marine Boundary Layer Experiment (COMBLE) and at Zeppelin Observatory, approximately 1000 km upwind from Andenes at Svalbard. During CAO events at Andenes, the sea-spray-mode number concentration is correlated with strong over-ocean winds with a mean of 8±4 cm-3 that is 71% higher than during non-CAO conditions. Additionally, during CAO events at Andenes, the mean Hoppel minimum diameter is 6 nm smaller than during non-CAO conditions, though the estimated supersaturation is lower, and the mean number concentration of particles that likely activated in-cloud is 109±61 cm-3 with no statistically significant difference from the non-CAO mean of 99±66 cm-3. For CAO trajectories between Zeppelin Observatory and Andenes, the upwind-to-downwind change in number concentration is the largest for the accumulation mode with a mean decrease of 93±95 cm-3, likely attributable primarily to precipitation scavenging. These characteristic properties of aerosol number size distributions during CAO events provide guidance for evaluating CAO aerosol-cloud interaction processes in models.
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BibTeX Citation
@article{wi00600i,
author={Williams, A. S. and Dedrick, J. L. and Russell, L. M. and Tornow, F. and Silber, I. and Fridlind, A. M. and Swanson, B. and DeMott, P. J. and Zieger, P. and Krejci, R.},
title={Aerosol size distribution properties associated with cold-air outbreaks in the Norwegian Arctic},
year={2024},
journal={Atmospheric Chemistry and Physics},
volume={24},
number={20},
pages={11791--11805},
doi={10.5194/acp-24-11791-2024},
}
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RIS Citation
TY - JOUR ID - wi00600i AU - Williams, A. S. AU - Dedrick, J. L. AU - Russell, L. M. AU - Tornow, F. AU - Silber, I. AU - Fridlind, A. M. AU - Swanson, B. AU - DeMott, P. J. AU - Zieger, P. AU - Krejci, R. PY - 2024 TI - Aerosol size distribution properties associated with cold-air outbreaks in the Norwegian Arctic JA - Atmos. Chem. Phys. JO - Atmospheric Chemistry and Physics VL - 24 IS - 20 SP - 11791 EP - 11805 DO - 10.5194/acp-24-11791-2024 ER -
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