{"ob_id":13242,"computationComponent":[{"ob_id":13240,"uuid":"335bb953b02a4da98196580504feac0b","title":"ECMWF reanalysis output for the ISLSCP-II project","abstract":"The ECMWF (European Centre for Medium-range Weather Forecasts) near-surface data\r\nset for the ISLSCP Initiative II data collection has been derived from the ECMWF 40-year reanalysis,\r\nor ERA40 (Simmons and Gibson, 2000), covering the years 1957 to 2001. The purpose\r\nof ERA40 is to produce an objective analysis of the atmosphere making optimal use of a wide\r\nrange of observing systems. A recent version of the ECMWF Numerical Weather Prediction\r\nsystem (cycle 23r4) is used for the entire analysis period. The advantage of re-analysis over\r\noperational analysis is that no system changes occur that might affect the analysis products,\r\nalthough there are significant changes in the observations","keywords":"ECMWF, ISLSCP II, reanalysis","inputDescription":null,"outputDescription":null,"softwareReference":null,"identifier_set":[]},{"ob_id":13241,"uuid":"01e87f78a3b34a1babef40f3271fe8ca","title":"NCEP reanalysis output for the ISLSCP-II project","abstract":"The analysis increment for the NCEP/DOE AMIP-II reanalysis is six hours, and output\r\ndata are routinely reported every hour or six hours. In order to satisfy the ISLSCP-II requirement\r\nfor 3-hourly data, twice daily 36 hour forecasts were made and hourly output were obtained from\r\nthe 24-36 hour forecasts. The 24-36 hour forecasts were chosen to minimize \"spin-up/spindown\"\r\nproblems. The one-hour data were later combined to produce 3-hourly data. Time\r\naveraging was performed on the native reanalysis grid. For the 3-hourly and the monthly-3-\r\nhourly data, the hour in the file name refers to the end of the 3-hour period. For example, 03Z\r\nrefers to the value at 03Z (for instantaneous data) or the average over the preceding period 00Z-\r\n03Z (for the flux fields and snow cover fraction).","keywords":"NCEP, ISLSCP II, reanalysis","inputDescription":null,"outputDescription":null,"softwareReference":null,"identifier_set":[]}],"acquisitionComponent":[],"identifier_set":[],"responsiblepartyinfo_set":["https://catalogue.ceda.ac.uk/api/v2/rpis/50734/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/50735/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/50737/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/50738/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/50736/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/50739/?format=json"]}