What question did this study set out to answer?

To implement a modified airborne radio occultation (ARO) bending angle operator within the MPAS–JEDI system and assess the impact of assimilating ARO data on atmospheric river forecasts.

September 1, 2026Journal of Advances in Modeling Earth SystemsOpen Access

Assimilating GNSS Airborne Radio Occultation Bending Angles With MPAS–JEDI During a Sequence of Atmospheric Rivers

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Authors

IBIvette Hernández BañosNSF National Center for Atmospheric Research JHJennifer S. HaaseLouisiana State University PHPaweł HordyniecScripps Institution of Oceanography

Discussion

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Implication

Observational modeling study demonstrates improved medium-range weather and precipitation forecasts over the Pacific, indicating operational readiness for airborne radio occultation data.

Key Points

To implement a modified airborne radio occultation (ARO) bending angle operator within the MPAS–JEDI system and assess the impact of assimilating ARO data on atmospheric river forecasts.
Coupled the Model for Prediction Across Scales–Atmosphere (MPAS–A) with the Joint Effort for Data Assimilation Integration (JEDI) framework using a modified ARO bending angle forward operator.
Conducted 6-hourly cycling observation system experiments across an 11-flight atmospheric river sequence over the United States West Coast in January 2023.
Evaluated forecast performance against traditional dropsonde measurements across 1- to 7-day lead times using spaceborne radio occultation error modeling.
ARO data assimilation reduced errors in background humidity, temperature, and wind fields over the northeast Pacific, producing closer alignment with dropsonde temperature profiles.
Forecast models exhibited modest short-term adjustments but yielded clear accuracy improvements across all atmospheric variables at 1–7 day lead times due to a better-constrained synoptic steering flow.
Assimilating ARO bending angles improved both the intensity and spatial positioning of integrated vapor transport and precipitation predictions at longer lead times.

Cite This Study

Baños et al. (2026) studied this question.

synapsesocial.com/papers/6aaf960f69a8459176350711 https://doi.org/10.1029/2025ms005432

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Implication

Observational modeling study demonstrates improved medium-range weather and precipitation forecasts over the Pacific, indicating operational readiness for airborne radio occultation data.

Assimilating GNSS Airborne Radio Occultation Bending Angles With MPAS–JEDI During a Sequence of Atmospheric Rivers

Discussion

Member takes

Implication

Key Points

Cite This Study

Assimilating GNSS Airborne Radio Occultation Bending Angles With MPAS–JEDI During a Sequence of Atmospheric Rivers

Discussion

Member takes

Implication

Key Points

Cite This Study

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