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本帖最后由 andrewsoong 于 2017-10-3 07:54 编辑
Dear Reanalysis users,
Some of you may already know that ECMWF has now launched its most powerful climate monitoring tool to date, ERA5, and has unveiled the first test data covering a two months period. Produced by the EU-funded Copernicus Climate Change Service operated by ECMWF, ERA5 is the fifth generation of ECMWF atmospheric reanalyses of the global climate. ERA5 Climate Reanalysis DataReanalysis is a key contribution to the implementation of the EU-funded Copernicus Climate Change Service (C3S) delivered by the European Centre for Medium-Range Weather Forecasts (ECMWF). Reanalysis data are used for monitoring climate change, for research and education, and for commercial applications. ERA5 will provide a number of the gridded Climate Data Records (CDRs) of essential climate variables (ECVs) in the C3S Climate Data Store (CDS). ERA5 Climate reanalysis gives a numerical description of the recent climate, produced by combining models with observations. It contains estimates of atmospheric parameters such as air temperature, pressure and wind at different altitudes, and surface parameters such as rainfall, soil moisture content, sea-surface temperature and wave height. ERA5 is the first reanalysis produced as an operational service rather than a research project and will provide data at a considerably higher spatial and temporal resolution than its predecessor ERA-Interim: hourly analysis fields will be available at a horizontal resolution of 31 km, and on 137 levels from the surface up to 0.01 hPa (around 80 km). In addition information on uncertainties will be provided for each parameter at 3-hourly intervals and at a horizontal resolution of 62 km. ERA5 is the fifth generation of ECMWF atmospheric reanalyses of the global climate. ECMWF climate reanalyses started with the FGGE reanalyses produced in the 1980s, followed by ERA-15, ERA-40 and most recently ERA-Interim. About ERA5 data productsAll ERA5 data products, which are open access and free to download, will include information about uncertainties, which is provided for each parameter at 3-hourly intervals and at a horizontal resolution of 62 km. Compared with ERA-Interim many new parameters, such as 100-metre wind components, is available as part of the output. A database containing all input observations, together with detailed information about how they are used, will be available and accessible to users. Altogether, the entire ERA5 production will generate roughly 5 petabytes of data.
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