Rapid Emulation of Spatially Resolved Temperature Response to Effective Radiative Forcing
Name
J Adv Model Earth Syst - 2025 - Womack - Rapid Emulation of Spatially Resolved Temperature Response to Effective Radiative.pdf
Description
Published version
Size
3.41 MB
Format
Adobe PDF
Checksum (MD5)
b084f38548ea1a90426213af07b2e4be
Author(s)
Womack, Christopher B
Giani, Paolo
Eastham, Sebastian D
Selin, Noelle E
Date Issued
January 23, 2025
Journal
Journal of Advances in Modeling Earth Systems
Publisher
American Geophysical Union
Citation
Womack, C. B., Giani, P., Eastham, S. D.,& Selin, N. E. (2025). Rapid emulation ofspatially resolved temperature response toeffective radiative forcing. Journal ofAdvances in Modeling Earth Systems, 17,e2024MS004523.
Version
Final published version
Abstract
Effective assessment of potential climate impacts requires the ability to rapidly predict the time‐varying response of climate variables. This prediction must be able to consider different combinations of forcing agents at high resolution. Full‐scale ESMs are too computationally intensive to run large scenario ensembles due to their long lead times and high costs. Faster approaches such as intermediate complexity modeling and pattern scaling are limited by low resolution and invariant response patterns, respectively. We propose a generalizable framework for emulating climate variables to overcome these issues, representing the climate system through spatially resolved impulse response functions. We derive impulse response functions by directly deconvolving effective radiative forcing and near‐surface air temperature time series. This enables rapid emulation of new scenarios through convolution and derivation of other impulse response functions from any forcing to its response. We present results from an application to near‐surface air temperature based on CMIP6 data. We evaluate emulator performance across 5 CMIP6 experiments including the SSPs, demonstrating accurate emulation of global mean and spatially resolved temperature change with respect to CMIP6 ensemble outputs. Global mean relative error in emulated temperature averages 1.49% in mid‐century and 1.25% by end‐of‐century. These errors are likely driven by state‐dependent climate feedbacks, such as the non‐linear effects of Arctic sea ice melt. We additionally show an illustrative example of our emulator for policy evaluation and impact analysis, emulating spatially resolved temperature change for a 1,000 member scenario ensemble in less than a second.
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivatives
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1029/2024MS004523
