Viewing posts for the category ECMWF data
Posted by: CEDA_site Admin in ECMWF data 9 years, 3 months ago
The ECMWF has announced that due to some fields not initialising properly all analysis total cloud cover data within the ECMWF operational data are unreliable. Therefore, the BADC has removed such data from its ECWMF operational data archive and is writing to inform present users of the ECMWF operational data of this. A 24 hour forecast TCC field has been generated from the +24 hour forecast fields and has been placed in the archive. These data are available from 01012002 to 01112007. If you require further information regarding these changes please contact the BADC helpdesk. The BADC helpdesk will also be unavailable from 3pm Friday 21st December 2007 to 9am 2nd January 2008. All queries received in this period will be answered as soon as possible in the New Year. Finally, the Helpdesk team would like to wish all BADC users past and present a
Posted by: CEDA_site Admin in ECMWF data 11 years, 5 months ago
We have recently added some additional forecast fields available to the ERA-40 dataset held at the BADC. Due to user demand additional single/surface level forecasts have been extracted as follows in the ERA-40 archive:
Posted by: CEDA_site Admin in ECMWF data 13 years ago
New ECMWF Seasonal Forecast (hindcast) Ensemble dataset ======================================================= In support of the COAPEC Thematic Programme the BADC has extracted ECMWF Seasonal Forecast ensemble data. These data are also known as "Hindcasts" as they are forecasts run retrospectively. The dataset includes monthly means, maxima, minima and standard deviations for the available surface variables for the period 1987-2001 (with 2002 onwards currently being extracted). Atmospheric variables are only currently available as monthly means. There are 33 parameters held on surface or single levels including winds, temperatures, heat fluxes, radiation, precipitation and soil moisture. Geopotential, Temperature, Specific Humidity, Relative Vorticity and Divergence are available on pressure levels. The data is held on a regular 1.875 x 1.875 degree grid in GRIB format. For each month there are six forecast months archived, with 5 ensemble members for 10 months of the year, and 40 ensemble members in May and November of each year. The data is now available to BADC users as part of the main ECMWF Operational archive with documentation located at: http://badc.nerc.ac.uk/data/ecmwf-op/seasonal_fcs.html Further documentation on the seasonal forecasts is available at the following ECMWF links: http://www.ecmwf.int/products/forecasts/seasonal/documentation http://www.ecmwf.int/publications/newsletters/pdf/98.pdf BADC Support. 12th March 2004.
Posted by: CEDA_site Admin in ECMWF data 13 years, 2 months ago
ERA-40 Live Access Server (LAS) Launched ======================================== The BADC is pleased to announce that we have launched the ERA-40 Live Access Server (LAS). This service allows sub-sets, plots and animations to be created dynamically from the ERA-40 dataset. The BADC LAS provides a multi-functional web-interface to large geospatial datasets. It is particularly suited to global gridded data such as the ERA-40 Re-analyses. Users registered for the ERA-40 data held at the BADC can log in to the BADC LAS to extract subsets of the dataset. All level types and parameters are available and all data has been transformed to a 1° x 1° grid (this was the favoured resolution in a user questionnaire). The BADC LAS allows data sub-setting in latitude, longitude, altitude and time. The output can be obtained in a number of formats including gif and postscript image files, or NetCDF data files. A limited animation facility is also available. Please note the ERA-40 LAS is only available to users that are registered for access to ERA-40. Users must log-in to the usual BADC web site before entering the LAS, after which you can go directly to the LAS in any subsequent sessions. The LAS intended for users with low data volume requirements. If it receives large requests it will ignore them and inform you that it is doing so. Moderate to high data volume users should contact BADC Support (email@example.com). More information about the LAS is available on the ERA-40 Regular Gridded Data page: http://badc.nerc.ac.uk/data/ecmwf-e40/gridded_data.html#badc_las BADC Support. 16 January 2004.
Posted by: CEDA_site Admin in ECMWF data 13 years, 9 months ago
Update on BADC archive of ERA-40 data: 6-hourly data and monthly means ====================================================================== 1. The 6-hourly ERA-40 Re-analysis Dataset - is now complete. 2. The monthly means for the ERA-40 Re-analysis Dataset - are now available (Includes a special note about INCORRECT FILES during the extraction period). More details follow: ========================================== 1. The 6-hourly ERA-40 Re-analysis Dataset ========================================== The 6-hourly data for the ERA-40 dataset is NOW COMPLETE in the main BADC archive from 1958-2001. Details about the type of data available can be found at: http://badc.nerc.ac.uk/data/ecmwf-e40 and the links from that page. A parameters page provides a list of those available on each level type: http://badc.nerc.ac.uk/data/ecmwf-e40/params.html ======================================================= 2. The monthly means for the ERA-40 Re-analysis Dataset ======================================================= Two types of monthly mean are now available for the ERA-40 dataset. These are the: i. Monthly diurnal means (moda) - calculated from all time steps in a given month (i.e. one mean per month). ii. Monthly synoptic (6-hourly) means (mm) - calculated from all values of a given time of day in a given month (i.e. 4 means exist per month, at 00, 06, 12 and 18UTC). Details on these means are now available at: http://badc.nerc.ac.uk/data/ecmwf-e40/means.html SPECIAL NOTE FOR USERS ACCESSING ERA-40 MEANS DURING THE EXTRACTION PERIOD: =========================================================================== Please note that during the extraction period (January - May 2003) some of the monthly mean files were incorrect. The means were not clearly visible and had not been advertised at this period so I am not aware of anyone having used them. However, if you did locate the means and you have used those located under one of the following directories then please obtain the new means as directed in the link above. The directories where errors occurred were /badc/ecmwf-e40/data/diags, /disks/tornado4/e40_means/mm and /disks/tornado4/e40_moda/moda. All the erroneous means were deleted on 20th June 2003. BADC Support 03/07/03.