Filter Organic and Elemental Composition of Submicron Aerosol Particles and Particle Number Concentration at Scripps Pier during EPCAPE 2023-24. In Aerosol Microphysics and Chemical Measurements at Mt. Soledad and Scripps Pier during the Eastern Pacific Cloud Aerosol Precipitation Experiment (EPCAPE) from February 2023 to February 2024

Dried submicrometer particles were collected on 37 mm Teflon filters after a 1-micrometer cyclone at Scripps Pier in the ARM AMF1 AOS van. Flow rate and pressure, solenoid power status, and particle number concentration (TSI Model 3010, recorded for <10000/cm3 by analog voltage output) were also recorded. The particle number concentration was used to stop sampling during particle number concentrations that exceeded 8000/cm3. Flow rates through each filter were recorded every second and integrated to obtain the sampled volume. Filters were analyzed by Fourier Transform Infrared (FTIR) spectroscopy for organic functional groups and were archived frozen. Selected filters were also analyzed for elements by X-ray Fluorescence (XRF). Users of these measurements are encouraged to consult with the authors about appropriate interpretation before submitting for publication, offering coauthorship where appropriate.