Vertical gas concentrations in exposed silicate sand beach on Santa Rosa Island, FL measured on Jun 7th, 2024

This project addresses carbon conversion processes in sandy beaches. To assess gas concentration gradients between the atmosphere and the beach sediment, vertical gas concentration profiles were measured below the beach sediment surface. Gas (custom probes) and temperature probes (PT100) were placed at 5 cm above the sediment and at 0, -5, -10, -15, -20, -25, -30, -35, -40, -45, -50 cm below the sediment surface. Pore gas was extracted from the sediment using a syringe pump (150 ml max. volume). Gas concentrations were measured with a Pyroscience Firesting O2 oxygenmeter and a Licor840A that recorded CO2 concentration, (ppm) and H2O concentration, (ppt).