Lee et al. (2025) Multiple Cloud Feedbacks in a Global Model From a Single Perturbation Experiment

⚠️ Warning: This summary was generated from the abstract only, as the full text was not available.

Identification

• Journal: Geophysical Research Letters
• Year: 2025
• Date: 2025-08-21
• Authors: Dongmin Lee, Lazaros Oreopoulos
• DOI: 10.1029/2025gl116120

Research Groups

• NASA (GEOS model development/research team)

Short Summary

This study demonstrates that different implementation choices for calculating cloud feedbacks within a single GEOS model perturbation experiment lead to a wide range of resulting feedback values.

Objective

• To evaluate how combinations of subgrid variability production, joint histogram interpretation, and the cloud radiative kernel approach influence the estimation of global cloud feedbacks.

Study Configuration

• Spatial Scale: Global
• Temporal Scale: Single perturbation experiment (+4 K SST)

Methodology and Data

• Models used: NASA GEOS model
• Data sources: Model-generated data from a +4 K Sea Surface Temperature (SST) perturbation experiment

Main Results

• The net global cloud feedback (sum of shortwave and longwave radiation changes) ranged from 0.4 to 1.1 $\text{W m}^{-2}\text{ K}^{-1}$ across 15 different combinations of implementation options.

Contributions

• Highlights that the quantitative estimate of cloud feedback is highly sensitive to implementation details, underscoring the necessity for rigorous documentation of these choices in climate modeling literature.

Funding

• Not specified in the provided text

Citation

@article{Lee2025Multiple,
  author = {Lee, Dongmin and Oreopoulos, Lazaros},
  title = {Multiple Cloud Feedbacks in a Global Model From a Single Perturbation Experiment},
  journal = {Geophysical Research Letters},
  year = {2025},
  doi = {10.1029/2025gl116120},
  url = {https://doi.org/10.1029/2025gl116120}
}