# Improving Background Error Covariances in a 3D Ensemble–Variational Data Assimilation System for Regional NWP

> Research article (Monthly Weather Review, 2018) · cited 31× · AI/ML

**Wikidata**: [openalex:W2898377155](https://www.wikidata.org/wiki/openalex:W2898377155)  
**Source**: https://4ort.xyz/entity/improving-background-error-covariances-in-a-3d-ensemblevariational-data-assimilation-system-for-regional-nwp