Author

Sergey Frolov

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Preprint Aug 2026

Long-window 4DVar for reanalysis using a differentiable weather model

Atmospheric reanalyses combine observations with model forecasts using complex data assimilation systems. We test whether a differentiable weather model permits a simpler and more accurate method based on a long-window four-dimensional variational data assimilation (4D-Var) formulation that omits the conventional backg...

Gregory J. Hakim, Jeffrey S. Whitaker, Bo Huang et al. · 0 citations

Preprint Aug 2026

Bridging short- and medium-range weather forecasting with machine learning

Nested-EAGLE (Experimental Artificial intelligence Global and Limited-area Ensemble) is presented, showing that the skill gains for near-surface fields stem from incorporating high-resolution regional analysis data into training through the nesting process, and provides the most accurate forecasts of storm locations at...

Timothy A. Smith, Mariah Pope, Sergey Frolov et al. · 2 citations