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GEOS‐S2S Version 2: The GMAO High‐Resolution Coupled Model and Assimilation System for Seasonal Prediction
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2020
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Source: Journal of Geophysical Research: Atmospheres, 125(5)
[PDF-76.35 MB]
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Journal Title:Journal of Geophysical Research: Atmospheres
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Description:The Global Modeling and Assimilation Office (GMAO) has recently released a new version of the Goddard Earth Observing System (GEOS) Subseasonal to Seasonal prediction (S2S) system, GEOS-S2S-2, that represents a substantial improvement in performance and infrastructure over theprevious system. The system is described here in detail, and results are presented from forecasts, climate equillibrium simulations, and data assimilation experiments. The climate or equillibrium state of the atmosphere and ocean showed a substantial reduction in bias relative to GEOS-S2S-1. The GEOS-S2S-2coupled reanalysis also showed substantial improvements, attributed to the assimilation of along-track absolute dynamic topography. The forecast skill on subseasonal scales showed a much improved prediction of the Madden-Julian Oscillation in GEOS-S2S-2, and on a seasonal scale the tropical Pacificforecasts show substantial improvement in the east and comparable skill to GEOS-S2S-1 in the central
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Source:Journal of Geophysical Research: Atmospheres, 125(5)
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ISSN:2169-897X;2169-8996;
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Rights Information:Other
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