Comeaux and Worley, NSF/NCAR/SCD Research Data Archives: ERA-40 and much more Joseph L. Comeaux II and Steven J. Worley Scientific Computing Division @ NCAR Comeaux and Worley, NSF/NCAR/SCD 8 November 2019

Comeaux and Worley, NSF/NCAR/SCD Outline Brief overview of the RDA ERA-40 Data and Services Comeaux and Worley, NSF/NCAR/SCD 8 November 2019

Comeaux and Worley, NSF/NCAR/SCD RDA definition Collection of reference datasets used in atmospheric and related sciences research Comeaux and Worley, NSF/NCAR/SCD 8 November 2019

Comeaux and Worley, NSF/NCAR/SCD RDA content Observations Conventional meteorology and oceanography Surface global ocean from ships and buoys global meteorology stations Profiles Global ocean hydrography Global upper air measurements Comeaux and Worley, NSF/NCAR/SCD 8 November 2019

Comeaux and Worley, NSF/NCAR/SCD Surface Observations Comeaux and Worley, NSF/NCAR/SCD 8 November 2019

Comeaux and Worley, NSF/NCAR/SCD RDA Content Operational Analyses NCEP Month delay cycle GFS FNL 1°x 1° Eta 212 (40km) + forecasts Near real time (2-days) via IDD RUC, Eta, GFS, ENS, ECMWF Lower res. than delayed mode data ECMWF 1 to 6 month delay Global (2.5° and T106 res.) Comeaux and Worley, NSF/NCAR/SCD 8 November 2019

Comeaux and Worley, NSF/NCAR/SCD RDA Content Reanalyses NCEP NCEP/NCAR Reanalysis I (C) 2.5°, 6-hrly, 1948-2004 NCEP/DOE Reanalysis II (C) 2.5°, 6-hrly, 1979-2004 North American Regional Reanalysis (C) AMS 05 Workshop Eta Model, 32km, 3-hrly, 1979-2003 Climatologies for base period 1979-2001 Access under preparation – like ERA-40 NLDAS 51-year US land hydrologic reanalysis 1948-1998, 1/8° Forcing NN Reanalysis and CPC daily precip. Comeaux and Worley, NSF/NCAR/SCD 8 November 2019

Comeaux and Worley, NSF/NCAR/SCD Eta and NARR domains Comeaux and Worley, NSF/NCAR/SCD 8 November 2019

Comeaux and Worley, NSF/NCAR/SCD RDA Content Reanalyses ECMWF ERA-15 (1979-1993) Global (2.5° and T106 res.) For reference and comparison ERA-40, details later Comeaux and Worley, NSF/NCAR/SCD 8 November 2019

Comeaux and Worley, NSF/NCAR/SCD RDA Content Many other categories of data Monthly and climatology precipitation Long-term SST analyses Monthly summary of the day station data Satellite derived datasets Global topography and ocean depth …… Add about 10-20 new datasets per year Comeaux and Worley, NSF/NCAR/SCD 8 November 2019

RDA Metadata and Access All datasets (over 500) Described with individual web pages http://dss.ucar.edu Assigned data consultant Catalogued in UCAR Community Data Portal Access All data available from NCAR MSS Accessible with SCD computing accounts Many popular products on the RDA server Direct download Consultants fill requests as needed Comeaux and Worley, NSF/NCAR/SCD 8 November 2019

Comeaux and Worley, NSF/NCAR/SCD ECMWF Reanalysis 40 (ERA-40) A new major feature in the RDA Comeaux and Worley, NSF/NCAR/SCD 8 November 2019

ECMWF ERA-40 Data from NCAR http://dss.ucar.edu/pub/era40 Model Specifics How to Access the Data Products Software and Utilities Summary Comeaux and Worley, NSF/NCAR/SCD 8 November 2019

Comeaux and Worley, NSF/NCAR/SCD Model Specifics Sept, 1957 – Aug, 2002 T159 spectral truncation Reduced N80 (~125km) 60 Hybrid Levels Ingested one of the largest archives of observational data ever assembled Atmospheric model coupled to an Ocean Wave model First for reanalysis model Comeaux and Worley, NSF/NCAR/SCD 8 November 2019

Comeaux and Worley, NSF/NCAR/SCD ACCESS Internet Most analysis products online Download monthly product files by web and FTP Comeaux and Worley, NSF/NCAR/SCD 8 November 2019

Comeaux and Worley, NSF/NCAR/SCD ACCESS Comeaux and Worley, NSF/NCAR/SCD 8 November 2019

Comeaux and Worley, NSF/NCAR/SCD ACCESS Internet Most analysis products online Download monthly product files Subsetting by variable, level and time Comeaux and Worley, NSF/NCAR/SCD 8 November 2019

Comeaux and Worley, NSF/NCAR/SCD ACCESS Comeaux and Worley, NSF/NCAR/SCD 8 November 2019

Comeaux and Worley, NSF/NCAR/SCD ACCESS Internet Most analysis products online Download monthly product files Subsetting by variable, level and time Products not online may be moved to server upon request Comeaux and Worley, NSF/NCAR/SCD 8 November 2019

Comeaux and Worley, NSF/NCAR/SCD ACCESS Internet Data can be copied to writable media ALL data available on NCAR MSS Comeaux and Worley, NSF/NCAR/SCD 8 November 2019

Comeaux and Worley, NSF/NCAR/SCD PRODUCTS 4x Day (00, 06, 12 and 18 UTC) Monthly Means NCAR created products Comeaux and Worley, NSF/NCAR/SCD 8 November 2019

Comeaux and Worley, NSF/NCAR/SCD PRODUCTS 4x Day Model Res. Analysis Forecast 2.5 Degree Lat/Lon Surface 509 1971 73 Pressure Level 796 3950 353 Model Level 1930 12700 Values in table indicate size of product in GB Comeaux and Worley, NSF/NCAR/SCD 8 November 2019

Comeaux and Worley, NSF/NCAR/SCD PRODUCTS 4x Day Other Products available from the MR analysis and Forecast fields Ocean Wave Analysis Fields 375 Isentropic 417 PV ±2 PVU 31 Ocean Wave Forecast Data 349 Chemical Transport 3400 Net Tendency 2280 Radiative Tendency Comeaux and Worley, NSF/NCAR/SCD 8 November 2019

PRODUCTS Monthly Means Model Res. Analysis Forecast 2.5 Degree Lat/Lon Surface 21 23 2 Pressure Level 30 11 Model Level 81 Means also available for Isentropic and PV Variances and Covariances available Comeaux and Worley, NSF/NCAR/SCD 8 November 2019

PRODUCTS NCAR Created Products U and V wind components 2.5°Latitude-Longitude Model Resolution Surface Pressure 2.5 Degree grid Regular Gaussian grid T85 Pressure and Model Level grids Same resolution as CCSM Comeaux and Worley, NSF/NCAR/SCD 8 November 2019

SOFTWARE and UTILITIES Format GRIB, Edition 1 WGRIB Decoding and reformatting NCL Created by Visualization group of SCD Decoding, regridding, reformatting and vis FORTRAN routines created by DSS Decoding and regridding Comeaux and Worley, NSF/NCAR/SCD 8 November 2019

Comeaux and Worley, NSF/NCAR/SCD SUMMARY Primary focus of DSS is to provide a high quality archive with an emphasis on data delivery The archive is actively supported by data specialists Many data services and access methods exist and more will be developed Comeaux and Worley, NSF/NCAR/SCD 8 November 2019

Comeaux and Worley, NSF/NCAR/SCD SUMMARY ERA-40 is a key reference dataset which will be a valuable resource for many years Comeaux and Worley, NSF/NCAR/SCD 8 November 2019

Comeaux and Worley, NSF/NCAR/SCD SUMMARY IIPS Poster Session 2 WEDS, 2:30-4:00 P2.34 DSS ERA-40 web page http://dss.ucar.edu/pub/era40 Comeaux and Worley, NSF/NCAR/SCD 8 November 2019

Comeaux and Worley, NSF/NCAR/SCD QUESTIONS Thanks for coming!!! Any ???? Comeaux and Worley, NSF/NCAR/SCD 8 November 2019