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Summary
Recently it was realized that in the past ERA5 has potentially assimilated incorrect snow observations. This has occurred because of problems in the quality control of these observations. Although this could have had local negative effects on the ERA5 snow product and other related surface parameters, a scan through the ERA5 archive did not clearly show many affected cases prior to 2021. However, a deeper investigation needs to be performed and will be reported in this page.
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| Figure 2. Monthly mean anomalies in soil moisture (layer 1) and snow depth for September 2021 based on the final ERA5 product. The final anomalies for October 2021 will be added when the data become available. |
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This document has been produced in the context of the Copernicus Climate Change Service (C3S). The activities leading to these results have been contracted by the European Centre for Medium-Range Weather Forecasts, operator of C3S on behalf of the European Union (Delegation agreement signed on 11/11/2014). All information in this document is provided "as is" and no guarantee or warranty is given that the information is fit for any particular purpose. The users thereof use the information at their sole risk and liability. For the avoidance of all doubt, the European Commission and the European Centre for Medium-Range Weather Forecasts have no liability in respect of this document, which is merely representing the author's view. |
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