Angle, Kyle J.; Crocker, Daniel R.; Simpson, Rebecca M.C.; Mayer, Kathryn J.; Garofalo, Lauren A.; Moore, Alexia N.; Mora Garcia, Stephanie L.; Or, Victor W.; Srinivasan, Sudarshan; Farhan, Mahum; Sauer, Jon S.; Lee, Christopher; Pothier, Matson A.; Farmer, Delphine K.; Martz, Todd R.; Bertram, Timothy H.; Cappa, Christopher D.; Prather, Kimberly A.; Grassian, Vicki H. (2020). Data from: Acidity Across the Interface: From the Ocean Surface to Sea Spray Aerosol. In Center for Aerosol Impacts on Chemistry of the Environment (CAICE). UC San Diego Library Digital Collections. https://doi.org/10.6075/J028065J

Publication abstract: Aerosols impact climate, human health and the chemistry of the atmosphere and aerosol pH plays a major role in the physicochemical properties of the aerosol. However, there remains uncertainty as to whether aerosols are acidic, neutral, or basic. In this research, we show that the pH of freshly emitted (nascent) sea spray aerosols is significantly lower than that of sea water (approximately four pH units, with pH being a log scale value) and that smaller aerosol particles below 1 micron in diameter have pH values that are even lower. These measurements of nascent sea spray aerosol pH, performed in a unique ocean-atmosphere facility, provide convincing data to show that acidification occurs "across the interface" within minutes, when aerosols form from ocean surface waters and become airborne. We also show there is a correlation between aerosol acidity and dissolved carbon dioxide but no correlation with marine biology within the seawater. We discuss the mechanisms and contributing factors to this acidity and its implications on atmospheric chemistry.

This package contains an explanatory readme file and the code and the data used to generate "Acidity Across the Interface: From the Ocean Surface to Sea Spray Aerosol".

• Time period of project: 2019-04-08 to 2020-07-02

• 2020

• Angle, Kyle J.

• Angle, Kyle J.
• Bertram, Timothy H.
• Cappa, Christopher D.
• Crocker, Daniel R.
• Farhan, Mahum
• Farmer, Delphine K.
• Garofalo, Lauren A.
• Grassian, Vicki H.
• Lee, Christopher
• Martz, Todd R.
• Mayer, Kathryn J.
• Moore, Alexia N.
• Mora Garcia, Stephanie L.
• Or, Victor W.
• Pothier, Matson A.
• Prather, Kimberly A.
• Sauer, Jon S.
• Simpson, Rebecca M. C.
• Srinivasan, Sudarshan

• Grassian, Vicki H.

All code is saved as .mat files and each is written to function as a MATLAB R2019b script, figure, or data source for a script.

This work was funded by the National Science Foundation (NSF) through the NSF Center for Aerosol Impacts on Chemistry of the Environment (CAICE) under Grant no. CHE-1801971.

• Aerosol pH
• Atmospheric chemistry
• Ocean acidity
• Sea spray aerosol (SSA)
• Sea surface microlayer (SSML)

• data

• English

Primary associated publication

• Angle, Kyle J.; Crocker, Daniel R.; Simpson, Rebecca M.C.; Mayer, Kathryn J.; Garofalo, Lauren A.; Moore, Alexia N.; Mora Garcia, Stephanie L.; Or, Victor W.; Srinivasan, Sudarshan; Farhan, Mahum; Sauer, Jon S.; Lee, Christopher; Pothier, Matson A.; Farmer, Delphine K.; Martz, Todd R.; Bertram, Timothy H.; Cappa, Christopher D.; Prather, Kimberly A.; Grassian, Vicki H. (2020). Acidity Across the Interface: From the Ocean Surface to Sea Spray Aerosol. PNAS, Vol. 118 (2) e2018397118. https://doi.org/10.1073/pnas.2018397118

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2022-07-19