CESM2 is nudged to ERA5 horizontal winds above 700 hPa under three forcing scenarios: HIST, NAT and PD.

Evidence (1)

European summer drying largely driven by atmospheric circulation changes since the 1980s — Circulation-storyline design and validation of nudged simulations

we nudge the Community Earth System Model Version 2 (CESM2) to horizontal winds above 700 hPa from the European Centre for Medium-Range Weather Forecasts Reanalysis v5 (ERA5)

https://doi.org/10.1038/s41561-026-02050-w#unit-2-p1

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