CAM-chem Data initial and boundary conditions for ICON-ART PRIEST v1.0

This is a monthly averaged CAM-chem dataset (Tilmes et al., 2022) conservatively remapped onto the ICON R3B4 grid for use in ICON-ART PRIEST (https://doi.org/10.5194/egusphere-2025-2289). Additionally, monthly maximum OH and peroxy radicals (RO2) are calculated from CH4, C2H6, C3H8, NO2, HO2, and OH (Equation 1, Thackray & Selin 2017). The data is available from January 2000 to July 2019, with the year 2000 using the same concentrations as 2001. The database includes the following variables: Initial condition variable name Boundary condition variable name Long name PS Surface pressure geopot Geopotential Height (above sea level) Q Specific humidity T Temperature CO CO concentration NO2 NO2_full.TL1 NO2 concentration HO2 HO2_full.TL1 HO2 concentration O3 O3 concentration OH OH_full.TL1 OH concentration NO NO_full.TL1 NO concentration H2O H2O_full.TL1 water vapor concentration RO2 RO2_full.TL1 RO2 concentration OHmax OHmax_full.TL1 OH concentration Thackray, C. P., & Selin, N. E. (2017). Uncertainty and variability in atmospheric formation of PFCAs from fluorotelomer precursors. Atmospheric Chemistry and Physics, 17(7), 4585–4597. https://doi.org/10.5194/acp-17-4585-2017 Tilmes, S., Emmons, L.K., Buchholz, R.R. & The CESM2 Development Team, (2022). CESM2.2/CAM-chem Output for Boundary Conditions. UCAR/NCAR - Atmospheric Chemistry Observations and Modeling Laboratory. Subset used† Global, January 2001 - July 2019, Accessed* 30 Mar 2024, DOI: https://doi.org/10.5065/XS0R-QE86.