Articles | Volume 20, issue 12
Atmos. Chem. Phys., 20, 7553–7573, 2020
https://doi.org/10.5194/acp-20-7553-2020

Special issue: Marine aerosols, trace gases, and clouds over the North Atlantic...

Atmos. Chem. Phys., 20, 7553–7573, 2020
https://doi.org/10.5194/acp-20-7553-2020

Research article 30 Jun 2020

Research article | 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 et al.

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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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