@article{1604fbad7ac94c0494adac411fe99e8a,
title = "Coupling an online ion conductivity measurement with the particle-into-liquid sampler: Evaluation and modeling using laboratory and field aerosol data",
abstract = "A particle-into-liquid sampler (PILS) was coupled to a flow-through conductivity cell to provide a continuous, nondestructive, online measurement in support of offline ion chromatography analysis. The conductivity measurement provides a rapid assessment of the total ion concentration augmenting slower batch-sample data from offline analysis and is developed primarily to assist airborne measurements, where fast time-response is essential. A conductivity model was developed for measured ions and excellent closure was derived for laboratory-generated aerosols (97% conductivity explained, R2 > 0.99). The PILS-conductivity measurement was extensively tested throughout the NASA Cloud, Aerosol and Monsoon Processes: Philippines Experiment (CAMP2Ex) during nineteen research flights. A diverse range of ambient aerosol was sampled from biomass burning, fresh and aged urban pollution, and marine sources. Ambient aerosol did not exhibit the same degree of closure as the laboratory aerosol, with measured ions only accountable for 43% of the conductivity. The remaining fraction of the conductivity was examined in combination with ion charge balance and found to provide additional supporting information for diagnosing and modeling particle acidity. An urban plume case study was used to demonstrate the utility of the measurement for supplementing compositional data and augmenting the temporal capability of the PILS.",
keywords = "Jim Smith",
author = "Ewan Crosbie and Shook, {Michael A.} and Ziemba, {Luke D.} and Anderson, {Bruce E.} and Braun, {Rachel A.} and Brown, {Matthew D.} and Jordan, {Carolyn E.} and MacDonald, {Alexander B.} and Moore, {Richard H.} and Nowak, {John B.} and Robinson, {Claire E.} and Taylor Shingler and Armin Sorooshian and Connor Stahl and Thornhill, {K. Lee} and Wiggins, {Elizabeth B.} and Edward Winstead",
note = "Funding Information: This research was funded by NASA's Radiation Sciences Program and authors from the University of Arizona acknowledge support from NASA grant 80NSSC18K0148. This work was funded in part by the ACTIVATE Earth Venture Suborbital-3 (EVS-3) investigation, which is supported by NASA{\textquoteright}s Earth Science Division and managed through the Earth System Science Pathfinder Program Office. We wish to thank the pilots and flight crew of the NASA Wallops Flight Facility P-3 aircraft for their support throughout the CAMP2Ex field campaign. We would also like to recognize the assistance from the NASA Ames Earth Science Project Office (ESPO) and facilities personnel at the Clark International Airport in Pampanga, Philippines. Finally, we would like to thank students and staff at the Manila Observatory for help in our field laboratory and we thank the two anonymous reviewers for their constructive feedback. Publisher Copyright: {\textcopyright}, This work was authored as part of the Contributor's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 USC. 105, no copyright protection is available for such works under US Law.",
year = "2020",
month = dec,
day = "1",
doi = "10.1080/02786826.2020.1795499",
language = "English (US)",
volume = "54",
pages = "1542--1555",
journal = "Aerosol Science and Technology",
issn = "0278-6826",
publisher = "Taylor and Francis Ltd.",
number = "12",
}