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

2. 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

3. 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

4. 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

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

6. 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

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

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

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

10. 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 new datasets per year
Comeaux and Worley, NSF/NCAR/SCD
8 November 2019

11. RDA Metadata and Access
All datasets (over 500)
Described with individual web pages
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

12. 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

13. ECMWF ERA-40 Data from NCAR
Model Specifics
How to Access the Data
Products
Software and Utilities
Summary
Comeaux and Worley, NSF/NCAR/SCD
8 November 2019

14. 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

15. 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

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

17. 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

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

19. 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

20. 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

21. 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

22. 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

23. 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

24. 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

25. 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

26. 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

27. 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

28. 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

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

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