1. Model Resolution Analysis Fields
2. Model Resolution Forecast Fields
3. Analysis Products on 2.5 Latitude-Longitude Grids
4. Monthly Means, Variances and Covariances
5. ERA-40 Products Created at NCAR

These data products are archived on the model native horizontal grids (either spherical harmonics or reduced Gaussian ) at four analysis times per day (00, 06, 12 and 18 UTC).

Product	Dataset	# of Levels	# of Variables	Volume in GBs
Surface and Single Level	ds117.0	1	108	509
Pressure Level	ds117.1	23	9	796
Model Level	ds117.2	60	11	1930
Isentropic	ds117.3	15	7	417
PV+-2	ds117.4	1	7	31
Chemical Transport	ds117.5	60	6	3400
Net Tendency	ds117.6	60	4	2280
Radiative Tendency	ds117.7	60	4	2280
Wave	ds123.0	1	23	375

Model Resolution Forecast Fields^{back to top}

These products include all the forecasts fields archived on the native horizontal model grid. The available forecast hours are:

Analysis Time	Forecast Hours
00,12UTC	3,6,9,12,15,18,21,24,30,36
06,18UTC	3,6

Product	Dataset	# of Levels	# of Variables	Volume in GBs
Surface and Single Level	ds121.0	1	75	1971
Pressure Level	ds121.1	23	9	3950
Model Level	ds121.2	60	11	12700
Wave	ds123.1	1	23	349

Analysis Products on 2.5 Latitude-Longitude Grids^{back to top}

ECMWF has interpolated selected surface and pressure level analyses products onto equally spaced 2.5 degree latitude-longitude grids.

Product	Dataset	# of Levels	# of Variables	Volume in GBs
Surface and Single Level	ds118.0	1	55	73
Pressure Level	ds118.1	23	11	353

Monthly Means, Variances and Covariances^{back to top}

Monthly means are available for selected model resolution analyses, all model resolution forecast products and the 2.5 degree products. There are two monthly mean products, one computed for each analysis hour (00, 06, 12 and 18UTC) and another as a diurnal mean of the analysis hours. Variances and Covariances are also available for some model level data as well as the surface pressure. Monthly means are also available for the 3 and 6 hour forecasts for the surface fields and the 6 hour forecasts for the pressure and model level products.

Product	Dataset	# of Levels	# of Variables	Volume in GBs
Model Resolution Analysis Monthly Means
Surface and Single Level	ds119.0	1	108	21
Pressure Level	ds119.1	23	9	30
Model Level	ds119.2	60	11	81
Isentropic	ds119.3	15	7	16
PV+-2	ds119.4	1	7	1
Model Resolution Forecast Monthly Means
Surface and Single Level	ds122.0	1	75	23
Pressure Level	ds122.1	23	9	30
Model Level	ds122.2	60	11	81
2.5 Degree Latitude-Longitude Monthly Means
Surface and Single Level	ds120.0	1	51	2
Pressure Level	ds120.1	23	11	11
Model Resolution Analysis Variances and Covariances of Monthly Means
Surface and Single Level	ds119.5	1	1	<1
Pressure Level	ds119.5	60	19	207

ERA-40 Products Created at NCAR^{back to top}

The ERA-40 products furnished by ECMWF have been augmented with products created at NCAR. Surface pressure was computed as a supplement for the 2.5 degree resolution data products (as well as on the reduced Gaussian grid). The U and V wind components on the 2.5 degree latitude-longitude pressure level grids have been recomputed because of incosistencies on the order of .5 m/s in the original data. For more info, please see http://dss.ucar.edu/datasets/common/ecmwf/ERA40/docs/emos-diagnostics/. Monthly mean 2.5 degree U and V have also been recomputed. T85 fields are being derived on both model and pressure levels. This was designed and initiated to aid users of the NCAR Community Climate System Model directly, and others that desire ready access to fully synthesized fields that circumvents the need to deal with the spectral (spherical harmonic) form of these data products.

Product	Dataset	# of Levels	# of Variables	Volume in GBs
2.5 degree Surface Pressure	ds118.0	1	1	1
2.5 degree U,V on Pressure Level	ds118.1	23	2	60
2.5 degree U,V Monthly Means	ds118.1	23	2	2
NCAR Created T85 Daily Analyses
T85 Surface and Single Level	ds124.0	1	73	291
T85 Pressure Level	ds124.1	23	11	1019
T85 Model Level	ds124.2	60	11	2657
NCAR Created T85 Monthly Means
T85 Surface and Single Level	ds126.0	1	74	291
T85 Pressure Level	ds126.1	23	11	42
T85 Model Level	ds126.2	60	13	105
NCAR Created T106 Daily Analyses
T106 Surface and Single Level	ds127.0	1	73	455
T106 Pressure Level	ds127.1	23	11	1551
T106 Model Level	ds127.2	60	13	3808
NCAR Created T106 Monthly Means
T106 Pressure Level	ds129.1	23	11	14