Articles | Volume 20, issue 12
https://doi.org/10.5194/acp-20-7553-2020
https://doi.org/10.5194/acp-20-7553-2020
Research article
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30 Jun 2020
Research article | Highlight paper |  | 30 Jun 2020

Identifying a regional aerosol baseline in the eastern North Atlantic using collocated measurements and a mathematical algorithm to mask high-submicron-number-concentration aerosol events

Francesca Gallo, Janek Uin, Stephen Springston, Jian Wang, Guangjie Zheng, Chongai Kuang, Robert Wood, Eduardo B. Azevedo, Allison McComiskey, Fan Mei, Adam Theisen, Jenni Kyrouac, and Allison C. Aiken

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Cited articles

Aiken, A. C. and Gallo, F.: Eastern North Atlantic Aerosol Mask (ENA-AM) with the Condensation Particle Counter (CPC) at Supplementary Facility (S01), US, N. p., https://doi.org/10.5439/1581730, 2020. 
Albrecht, B. A., Bretherton, C. S., Johnson, D., Scubert, W. H., and Frisch, A. S.: The Atlantic Stratocumulus Transition Experiment–STEX, B. Am. Meteorol. Soc., 76, 889–904, https://doi.org/10.1175/1520-0477(1995)076<0889:taste>2.0.co;2, 1995. 
Anderson, T. L., Charlson, R. J., Schwartz, S. E., Knutti, R., Boucher, O., Rodhe, H., and Heintzenberg, J.: Climate Forcing by Aerosols–a Hazy Picture, Science, 300, 1103–1104, https://doi.org/10.1126/science.1084777, 2003. 
Atmospheric Radiation Measurement (ARM) user facility: 2014, updated hourly. Ultra-High Sensitivity Aerosol Spectrometer (AOSUHSAS). 2017-07-22 to 2017-12-30, Eastern North Atlantic (ENA) Graciosa Island, Azores, Portugal (C1), compiled by: Senum, G., Uin, J., Salwen, C., Uin, J., and Senum, G., ARM Data Center, https://doi.org/10.5439/1095587, 2014a. 
Atmospheric Radiation Measurement (ARM) user facility: 2014, updated hourly. Ultra-High Sensitivity Aerosol Spectrometer (AOSUHSAS). 2017-07-22 to 2017-12-30, Eastern North Atlantic (ENA) Graciosa Island, Azores, Portugal; Supplemental Site (S1), compiled by: Senum, G., Uin, J., Salwen, C., Uin, J., and Senum, G., ARM Data Center, https://doi.org/10.5439/1095587, 2014b. 
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Short summary
Continuous high-time-resolution ambient data can include periods when aerosol properties do not represent regional aerosol processes due to high-concentration local events. We develop a novel aerosol mask at the U.S. Department of Energy’s Atmospheric Radiation Measurement (ARM) facility in the eastern North Atlantic (ENA). We use two ground sites to validate the mask, include a comparison with aircraft overflights, and provide guidance to increase data quality at ENA and other locations.
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