Enhanced Organic Aerosol from Sea-spray Mitigates Global Warming (Results PartⅠ: Present-day)

These are the experimental results from Present-day simulations supporting our research article, Enhanced Organic Aerosol from Sea-spray Mitigates Global Warming. Sea-spray primary organic aerosol (SSPOA), produced by ocean biological activity, is a key natural aerosol source that regulates marine cloud properties and climate cooling, yet its feedback is not explicitly represented in most Earth-system models. In this study, we advance a fully coupled CESM2 model by incorporating explicit SSPOA emissions, enabling paired present-day and future simulations to quantify its global climate effects. These files include the results from Present-day experiments that support our research. The Present-day experimental results include two groups of simulations: WithSSPOA and WithoutSSPOA. The archived files contain key variables used for the analysis in this study. Specifically, the datasets include variables related to aerosol burden, Aitken-mode aerosol burden, cloud droplet number concentration, cloud liquid water path, aerosol effective radius, shortwave cloud forcing, top-of-atmosphere shortwave flux, precipitation, relative humidity, 850-hPa specific humidity, surface temperature, 2-m air temperature, 10-m wind speed, and vertical motion. SSPOA-specific variables, including SSPOA burden, SSPOA Aitken-mode burden, SSPOA surface concentration, and SSPOA surface emissions, are only included in the WithSSPOA outputs. The Present-day experiments were simulated for 60 years, and the results are provided for the last 50 years after excluding the first 10 years as spin-up. All files are provided in NetCDF (.nc) format.