Methods for assessing the impact of current and future components of the global observing system

Title
Methods for assessing the impact of current and future components of the global observing system
Technical memorandum
Date Published
04/2024
Secondary Title
ECMWF Technical Memoranda
Number
916
Author
Sean Healy
Niels Bormann
Alan Geer
Elias Holm
Bruce Ingleby
Katie Lean
Katrin Lonitz
Cristina Lupu
Publisher
ECMWF
Abstract We review the assessment of existing observations with Observing System Experiments (OSEs) and the Forecast Sensitivity to Observation Impact (FSOI) approach. Although care is needed when interpreting their results, the information they provide is largely consistent. The Ensemble of Data Assimilations (EDA) provides an affordable and manageable framework for simulating the impact of future observing systems. Recent experience comparing EDA predictions with the subsequent impact of real measurements gives us some confidence that, with appropriate interpretation and care, they provide useful information that can help guide the future evolution of the global observing system.
URL https://www.ecmwf.int/en/elibrary/81556-methods-assessing-impact-current-and-future-components-global-observing-system
DOI 10.21957/2f240fe55f
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