# Changes between Version 24 and Version 25 of udg/ecoms

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Timestamp:
Mar 14, 2013 12:32:32 PM (9 years ago)
Comment:

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Unmodified
 v24 Typically the data portal will include information at a daily resolution, but monthly-aggregated values could be also provided in some cases due to data limitations (in particular, ''Mètèo-France'' and ''Met Office'' have agreeed to provide monthly mean hindcasts for their use by the ''SPECS'' and ''EUPORIAS'' partners). In general, the data available will be typical surface variables (e.g. precipitation and near-surface temperature), although several variables (e.g. geopotential and temperature) on pressure levels will also be  stored for the statistical downscaling activities. The data gathering activities have initially focused on the ''ECMWF System4 seasonal model''. The Meteorological Archival and Retrieval System (MARS) is the main repository of meteorological data at the ''ECMWF'' (European Centre for Medium-Range Weather Forecasts). It contains terabytes of operational and research data as well as data from special projects[[FootNote(http://www.ecmwf.int/services/archive/ MARS service)]]. The large amount of information stored and the inherent complexities of data access, download and post-processing is a first shortcoming for a flexible use of these datasets by a large number of partners. To overcome this issue, a reduced subset of surface variables[[FootNote(http://www.ecmwf.int/products/changes/system4/technical_description.html#description)]] (precipitation, temperatures and mean sea level pressure) have been downloaded from MARS (a colection of GRIB-1 files) at 0.75º spatial resolution and made available throught the ''SPECS-EUPORIAS data portal''. The downloaded data has been exposed as three different virtual datasets using TDS: The data gathering activities have initially focused on the ''ECMWF System4 seasonal model''. The Meteorological Archival and Retrieval System (MARS) is the main repository of meteorological data at the ''ECMWF'' (European Centre for Medium-Range Weather Forecasts). It contains terabytes of operational and research data as well as data from special projects[[FootNote(http://www.ecmwf.int/services/archive/)]]. The large amount of information stored and the inherent complexities of data access, download and post-processing is a first shortcoming for a flexible use of these datasets by a large number of partners. To overcome this issue, a reduced subset of surface variables[[FootNote(http://www.ecmwf.int/products/changes/system4/technical_description.html#description)]] (precipitation, temperatures and mean sea level pressure) have been downloaded from MARS (a colection of GRIB-1 files) at 0.75º spatial resolution and made available throught the ''SPECS-EUPORIAS data portal''. The downloaded data has been exposed as three different virtual datasets using TDS: * '''System4 seasonal range (15 members)''': There are twelve initializations (hereafter called runtimes) per year (the first of January, February, ...) running for 7 months (hereafter called simply times). An ensemble of 15 members is available for the whole 1981-2010 period.