[DSRP Evidence](https://dsrpevidence.org/)

# Systematic Underestimation of Nonlinear and Synergistic Soil Moisture-Precipitation Coupling in Convection-Permitting Models

Gao et al., 2026, Journal of Geophysical Research: Atmospheres — Meteorology

Patterns: [Relationships](https://dsrpevidence.org/pattern/relationships)

## In short

The paper's core contribution is quantifying how strongly one Earth-system variable acts on another beyond mere co-occurrence, showing that simple correlational framing badly undercounts a real physical coupling.

## What they found (results)

A nonlinear decomposition of observational data over the contiguous US attributed up to about 20% of afternoon precipitation variance to morning soil moisture, versus only 6-8% from linear correlation alone, and found a convection-permitting climate model systematically underestimates this coupling strength.

These researchers were not testing DSRP. The finding is theirs; the correspondence to DSRP is drawn by this site.

[Source](https://doi.org/10.1029/2026JD046616)