Seventy-six parent and alkylated polycyclic aromatic hydrocarbons (PAHs) were quantified in wildfire ash (airborne and in situ), stream sediment, steelhead, crayfish, and marine mussels after the August 2020 CZU Lightning Complex Wildfire and at regular intervals over three years.

After the CZU Wildfire in August 2020, stream sediment (7 burned, 1 unburned drainages), airborne ash, in situ ash, and regolith were collected from August 2020 to August 2023 to characterize wildfire effects. Solid-phase parameters include sand-sized charcoal counts, total carbon (TC), total inorganic carbon (TIC), total organic carbon (TOC), bulk stable carbon 13/12 isotope ratios (d13C), bulk stable nitrogen 15/14 isotope ratios (d15N), and concentrations of 60 elements in the less than 63 micron fine ...

Seventy six parent and alkylated polycyclic aromatic compounds, including polycyclic aromatic hydrocarbons (PAHs), were quantified in watershed and reef sediment from Olowalu, Maui, in February 2022 to explore urban and wildfire effects. Sample locations and total organic carbon contents (OC) are available in the accompanying file OlowaluWatershedReef2022_compositions.csv.

Fine-sediment elemental chemistry, short-lived cosmogenic radionuclides (Beryllium-7, Cesium-137, and Lead-210), charcoal counts, and total organic carbon contents were quantified to describe urban and wildfire effects and land-based sediment sources and runoff to Olowalu Reef in February 2022.