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Hang Fan

3 accepted papers

2025

Align-DA: Align Score-based Atmospheric Data Assimilation with Multiple Preferences

NeurIPS 2025poster

Data assimilation (DA) aims to estimate the full state of a dynamical system by combining partial and noisy observations with a prior model forecast, commonly referred to as the background. In atmospheric applications, this problem is fundamentally ill-posed due to the sparsity of observations relat…

Cited by 0SourceScholar
2025

LoRA-EnVar: Parameter-Efficient Hybrid Ensemble Variational Assimilation for Weather Forecasting

NeurIPS 2025poster

Accurate estimation of background error (i.e., forecast error) distribution is critical for effective data assimilation (DA) in numerical weather prediction (NWP). In state-of-the-art operational DA systems, it is common to account for the temporal evolution of background errors by employing hybrid…

Cited by 0SourceScholar
2025

Satellite Observations Guided Diffusion Model for Accurate Meteorological States at Arbitrary Resolution

CVPR 2025highlight

Accurate acquisition of surface meteorological conditions at arbitrary locations holds significant importance for weather forecasting and climate simulation. Meteorological states derived from satellite observations are often provided in the form of low-resolution grid fields. If spatial interpolati…