edu.ucar.opensky::technotes:347 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-26T17:03:22.925564 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7tx3dtr ECMWF Global Analyses 1979-1986: Circulation Statistics and Data Evaluation 1988-01-01T00:00:00Z publication https://n2t.org/ark:/85065/d7tx3dtr https://doi.org/10.5065/D6SN06X6 Trenberth, K. author Olson, J. author UCAR/NCAR - Library publisher The purpose of this technical note is to establish the climate record from global analyses for use in compiling climatologies which may then be used to validate the Community Climate Model or as a base for examining anomalies such as occur in association with El Nino-Southern Oscillation events. Known problems with the ECMWF data set and changes in the operational analysis-forecast system including those which have resulted in major changes in analysis characteristics with time are documented. A transformation of the data set into a form which makes it more readily available are described. Moreover, climatological average statistics have been computed and are similarly available, both on line at NCAR and, for the long term averages, in fiche at the back of this report. This report is the second in a series of three as part of a project to comprehensively evaluate data sets of global analyses from the U.S. National Meteorological Center (NMC) and the European Centre for Medium Range Weather Forecasts (ECMWF). The first, NCAR/TN-299+STR, reported on the NMC data set of global analyses. This second report deals with the ECMWF analyses, and the third report, NCAR/TN-301+STR, describes results from a detailed comparison of the two data sets. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Upper level winds Geopotential height Relative humidity Upper air temperature Weather research/forecast models theme U.S. National Aeronautics and Space Administration Global Change Master Directory GCMD 2021-09-17 revision 11.2 NASA Global Change Master Directory originator Valids List: Science and Services Keywords Copyright Author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation