Articles | Volume 24, issue 5
https://doi.org/10.5194/acp-24-3349-2024
https://doi.org/10.5194/acp-24-3349-2024
Research article
 | 
18 Mar 2024
Research article |  | 18 Mar 2024

Sea salt reactivity over the northwest Atlantic: an in-depth look using the airborne ACTIVATE dataset

Eva-Lou Edwards, Yonghoon Choi, Ewan C. Crosbie, Joshua P. DiGangi, Glenn S. Diskin, Claire E. Robinson, Michael A. Shook, Edward L. Winstead, Luke D. Ziemba, and Armin Sorooshian

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Spatially coordinated airborne data and complementary products for aerosol, gas, cloud, and meteorological studies: the NASA ACTIVATE dataset
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Cited articles

ACTIVATE Science Team: Aerosol Cloud meTeorology Interactions oVer the western ATlantic Experiment Data, NASA [data set], https://doi.org/10.5067/SUBORBITAL/ACTIVATE/DATA001, 2020. 
Akagi, S. K., Yokelson, R. J., Burling, I. R., Meinardi, S., Simpson, I., Blake, D. R., McMeeking, G. R., Sullivan, A., Lee, T., Kreidenweis, S., Urbanski, S., Reardon, J., Griffith, D. W. T., Johnson, T. J., and Weise, D. R.: Measurements of reactive trace gases and variable O3 formation rates in some South Carolina biomass burning plumes, Atmos. Chem. Phys., 13, 1141–1165, https://doi.org/10.5194/acp-13-1141-2013, 2013. 
Aldhaif, A. M., Lopez, D. H., Dadashazar, H., and Sorooshian, A.: Sources, frequency, and chemical nature of dust events impacting the United States East Coast, Atmos. Environ., 231, 117456, https://doi.org/10.1016/j.atmosenv.2020.117456, 2020. 
Al-Hosney, H. A., Carlos-Cuellar, S., Baltrusaitis, J., and Grassian, V. H.: Heterogeneous uptake and reactivity of formic acid on calcium carbonate particles: a Knudsen cell reactor, FTIR and SEM study, Phys. Chem. Chem. Phys., 7, 3587–3595, https://doi.org/10.1039/B510112C, 2005. 
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We investigate Cl depletion in sea salt particles over the northwest Atlantic from December 2021 to June 2022 using an airborne dataset. Losses of Cl are greatest in May and least in December–February and March. Inorganic acidic species can account for all depletion observed for December–February, March, and June near Bermuda but none in May. Quantifying Cl depletion as a percentage captures seasonal trends in depletion but fails to convey the effects it may have on atmospheric oxidation.
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