A tool for converting CESM2-ARISE-SAI (Solar Climate Intervention) data into WRF Intermediate Format

This tool provides a workflow for bridging global climate model outputs with regional climate simulations.

Specifically, it converts 3-hourly atmospheric and surface fields from the Community Earth System Model version 2 (CESM2), including specific solar climate intervention experiments like ARISE-SAI-1.5 and reference scenarios SSP2-4.5, into the WRF (Weather Research and Forecasting) Intermediate Format.

Methodological Foundation: The conversion workflow is based on the methodology described by Bruyère et al. (2014), with significant modifications to handle the specific metadata and coordinate systems of the CESM2 ARISE-SAI and SSP ensembles.

Key Technical Features:

• Atmospheric Data: Processes 3-hourly fields including, for example, temperature, wind components. Data is vertically interpolated from the original CESM2 levels to 21 selected pressure levels, ensuring compatibility with the WRF Preprocessing System (WPS).

• Surface and Soil Data: Handles daily and monthly surface data, specifically mapping 4 soil levels for soil moisture and soil temperature to provide accurate lower boundary conditions for WRF.

References:

Bruyère, C. L., Done, J. M., Holland, G. J., & Fredrick, S. (2014). Bias corrections of global models for regional climate simulations of high-impact weather. Climate Dynamics, 43, 1847–1856. https://doi.org/10.1007/s00382-013-2011-6

Nguyen, T., Kravitz, B., Hurrell, J. W., Rasmussen, K. L., O’Brien, T. A., Ficklin, D. L., Visioni, D., Sun, L., Li, T., "Dynamical downscaling for Solar geoengineering: U.S. Midwest extreme precipitation signals and implications for future simulations," Geophysical Research Letters, 2026 (In preparation).