NCEP/NCAR Reanalysis, Daily

Daily Means and Other Derived Variables (Fluxes): Other_Gauss

The NCEP/NCAR Reanalysis 1 project is using a state-of-the-art analysis/forecast system to perform data assimilation using past data from 1948 to the present. A large subset of this data is available from Physical Sciences Division (PSD) at NOAA in its original 4 times daily format and as daily averages. However, the data from 1948-1957 is a little different, in the regular (non-Gaussian) gridded data. That data was done at 8 times daily in the model, because the inputs available in that era were available at 3Z, 9Z, 15Z, and 21Z, whereas the 4x daily data has been available at 0Z, 6Z, 12Z, and 18Z. These latter times were forecasted and the combined result for this early era is 8x daily. The local ingestion process took only the 0Z, 6Z, 12Z, and 18Z forecasted values, and thus only those were used to make the daily time series and monthly means here.

Reference:
Kalnay et al., (1996). The NCEP/NCAR 40-year reanalysis project, Bull. Amer. Meteor. Soc., 77, 437-470

Variables (1981-2010 LTM and count available)
Clear Sky Upward Longwave Flux at Nominal top of Atmosphere (W/m^2)
Clear Sky Upward Solar Flux at Nominal top of Atmosphere (W/m^2)
Downward Solar Radiation Flux at Nominal top of Atmosphere (W/m^2)
Pressure at High Cloud Bottom (Pascals)
Pressure at High Cloud Top (Pascals)
Pressure at Low Cloud Bottom (Pascals)
Pressure at Low Cloud Top (Pascals)
Pressure at Middle Cloud Bottom (Pascals)
Pressure at Middle Cloud Top (Pascals)
Total Cloud Cover at Entire Atmosphere (%)
Upward Longwave Radiation Flux at Nominal top of Atmosphere (W/m^2)
Upward Solar Radiation Flux at Nominal top of Atmosphere (W/m^2)
Zonal Global by T62 Gaussian grid
Meridional Global by T62 Gaussian grid
Vertical Surface or near the surface, nominal top of atmosphere (NTAT), entire atmosphere as a column, cloud pressure levels
Please check the list of the variables (above) for levels of each variable  
Temporal Jan 1, 1948 to last day of (present - 1) month by 1 day(s)
Static? no
Volume 13MB per variable per year
Server public:
Source http://www.esrl.noaa.gov/psd/data/gridded/data.ncep.reanalysis.other_flux.html 
Acquired Feb 7, 2011 (Updated Monthly)
APDRC contact
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Daily Means and Other Derived Variables: Pressure Level

The NCEP/NCAR Reanalysis 1 project is using a state-of-the-art analysis/forecast system to perform data assimilation using past data from 1948 to the present. A large subset of this data is available from Physical Sciences Division (PSD) at NOAA in its original 4 times daily format and as daily averages. However, the data from 1948-1957 is a little different, in the regular (non-Gaussian) gridded data. That data was done at 8 times daily in the model, because the inputs available in that era were available at 3Z, 9Z, 15Z, and 21Z, whereas the 4x daily data has been available at 0Z, 6Z, 12Z, and 18Z. These latter times were forecasted and the combined result for this early era is 8x daily. The local ingestion process took only the 0Z, 6Z, 12Z, and 18Z forecasted values, and thus only those were used to make the daily time series and monthly means here.

Reference:
Kalnay et al., (1996). The NCEP/NCAR 40-year reanalysis project, Bull. Amer. Meteor. Soc., 77, 437-470

Variables (1981-2010 LTM and count available)
Air Temperature (degK)
Geopotential Height (m)
Omega (Pascal/s)
Relative Humidity (%)
Specific Humidity (Kg/kg)
U-Wind (m/s)
V-wind (m/s)
Zonal Global by 2.5 deg
Meridional Global by 2.5 deg
Vertical 17 pressure levels (hPa): 1000, 925, 850, 700, 600, 500, 400, 300, 250, 200, 150, 100, 70, 50, 30, 20, 10 (All except Omega (to 100mb), Specific Humidity, and Relative Humidity (to 300mb))  
Temporal Jan 1, 1948 to last day of (present - 1) month by 1 day(s)
Static? no
Volume 125MB per variable per year (All except Omega and Humidities)
88MB per variable per year (Omega)
59MB per variable per year (Relative Humidity and Specific Humidity)
Server public:
Source http://www.esrl.noaa.gov/psd/data/gridded/data.ncep.reanalysis.pressure.html 
Acquired Feb 7, 2011 (Updated Monthly)
APDRC contact
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Daily Means and Other Derived Variables: Sigma (Spectral Coefficients)

The NCEP/NCAR Reanalysis 1 project is using a state-of-the-art analysis/forecast system to perform data assimilation using past data from 1948 to the present. A large subset of this data is available from the Physical Sciences Division (PSD) at NOAA in its original 4 times daily format and as daily averages. However, the data from 1948-1957 is a little different, in the regular (non-Gaussian) gridded data. That data was done at 8 times daily in the model, because the inputs available in that era were available at 3Z, 9Z, 15Z, and 21Z, whereas the 4x daily data has been available at 0Z, 6Z, 12Z, and 18Z. These latter times were forecasted and the combined result for this early era is 8x daily. The local ingestion process took only the 0Z, 6Z, 12Z, and 18Z forecasted values, and thus only those were used to make the daily time series and monthly means here.

Reference:
Kalnay et al., (1996). The NCEP/NCAR 40-year reanalysis project, Bull. Amer. Meteor. Soc., 77, 437-470

Variables (1981-2010 LTM and count available)
Streamfunction (m*m/s)
Velocity Potential (m*m/s)
Zonal Global by T62 Gaussian grid
Meridional Global by T62 Gaussian grid
Vertical 5 sigma levels: 0.995 , 0.8458 , 0.2582 , 0.2101 , 0.1682  
Temporal Jan 1, 1948 to last day of (present - 1) month by 1 day(s)
Static? no
Volume 64MB per variable per year
Server public:
Source http://www.esrl.noaa.gov/psd/data/gridded/data.ncep.reanalysis.derived.sigma.html 
Acquired Feb 1, 2011 (Updated Monthly)
APDRC contact
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Daily Means and Other Derived Variables: Surface

The NCEP/NCAR Reanalysis 1 project is using a state-of-the-art analysis/forecast system to perform data assimilation using past data from 1948 to the present. A large subset of this data is available from the Physical Sciences Division (PSD) in its original 4 times daily format and as daily averages. However, the data from 1948-1957 is a little different, in the regular (non-Gaussian) gridded data. That data was done at 8 times daily in the model, because the inputs available in that era were available at 3Z, 9Z, 15Z, and 21Z, whereas the 4x daily data has been available at 0Z, 6Z, 12Z, and 18Z. These latter times were forecasted and the combined result for this early era is 8x daily. The local ingestion process took only the 0Z, 6Z, 12Z, and 18Z forecasted values, and thus only those were used to make the daily time series and monthly means here.

Reference:
Kalnay et al., (1996). The NCEP/NCAR 40-year reanalysis project, Bull. Amer. Meteor. Soc., 77, 437-470

Variables (1981-2010 LTM and count available)
Air temperature at sigma level 995 (degK)
Best (4-layer) Lifted Index (degK)
Surface Lifted Index (degK)
Omega (Pascals/s)
Potential temperature at sigma level 995 (degK)
Pressure (Pascals)
Precipitable Water for entire atmosphere (Kg/m^2)
Relative Humidity at sigma level 995 (%)
Sea level pressure (Pascals)
U-Wind at sigma level 995 (m/s)
V-wind at sigma level 995 (m/s)
Zonal Global by 2.5 deg
Meridional Global by 2.5 deg
Vertical Surface or near the surface (.995 sigma level), or entire atmosphere (eatm)
Please check the list of the variables (above) for levels of each variable  
Temporal Jan 1, 1948 to last day of (present - 1) month by 1 day(s)
Static? no
Volume 7.4MB per variable per year
Server public:
Source http://www.esrl.noaa.gov/psd/data/gridded/data.ncep.reanalysis.surface.html 
Acquired Feb 7, 2011 (Updated Monthly)
APDRC contact
Supplements

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Daily Means and Other Derived Variables (Surface Fluxes): Surface_Gauss

The NCEP/NCAR Reanalysis 1 project is using a state-of-the-art analysis/forecast system to perform data assimilation using past data from 1948 to the present. A large subset of this data is available from Physical Sciences Division (PSD) at NOAA in its original 4 times daily format and as daily averages. However, the data from 1948-1957 is a little different, in the regular (non-Gaussian) gridded data. That data was done at 8 times daily in the model, because the inputs available in that era were available at 3Z, 9Z, 15Z, and 21Z, whereas the 4x daily data has been available at 0Z, 6Z, 12Z, and 18Z. These latter times were forecasted and the combined result for this early era is 8x daily. The local ingestion process took only the 0Z, 6Z, 12Z, and 18Z forecasted values, and thus only those were used to make the daily time series and monthly means here.

Reference:
Kalnay et al., (1996). The NCEP/NCAR 40-year reanalysis project, Bull. Amer. Meteor. Soc., 77, 437-470

Variables (1981-2010 LTM and count available)
Air Temperature at 2 meters (degK)
Clear Sky Downward Longwave Flux at surface (W/m^2)
Clear Sky Downward Solar Flux at surface (W/m^2)
Clear Sky Upward Solar Flux at surface (W/m^2)
Cloud Forcing Net Longwave Flux at surface (W/m^2)
Cloud Forcing Net Solar Flux at surface (W/m^2)
Convective Precipitation Rate at surface (Kg/m^2/s)
Downward Longwave Radiation Flux at surface (W/m^2)
Downward Solar Radiation Flux at surface (W/m^2)
Ground heat flux at surface (W/m^2)
Ice Concentration at surface
Latent Heat Net Flux at surface (W/m^2)
Maximum Temperature at 2 m (degK)
Meridional Gravity Wave Stress at surface (N/m^2)
Minimum Temperature at 2 m (degK)
Momentum flux, U-component at surface (N/m2)
Momentum flux, V-Component at surface (N/m^2)
Near IR Beam Downward Solar Flux at surface (W/m^2)
Near IR Diffuse Downward Solar Flux at surface W/m^2)
Net Longwave Radiation Flux at surface (W/m^2)
Net Shortwave Radiation Flux at surface (W/m^2)
Potential Evaporation Rate at surface (W/m^2)
Precipitation Rate at surface (Kg/m^2/s)
Pressure at surface (Pascals)
Sensible Heat Net Flux at surface (W/m^2)
Specific Humidity at 2 m (Kg/Kg)
SST/Land Skin Temperature at surface (degK)
Surface Roughness (m)
Temperature at 300 cm below ground level (degK)
Temperature between 0-10 cm Below Ground Level (degK)
Temperature between 10-200 cm Below Ground Level (degK)
U-Wind at 10m (m/s)
Upward Longwave Radiation Flux at surface (W/m^2)
Upward Solar Radiation Flux at surface (W/m^2)
V-Wind at 10m (m/s)
Visible Beam Downward Solar Flux at surface (W/m^2)
Visible Diffuse Downward Solar Flux at surface (W/m^2)
Volumetric Soil Moisture between 0-10 cm Below Ground Level (fraction)
Volumetric Soil Moisture between 10-200 cm Below Ground Level (fraction)
Water Equiv. of Accum. Snow Depth at surface (Kg/m^2)
Water Runoff at surface (Kg/m^2)
Zonal Gravity Wave Stress at surface (N/m^2)
Zonal Global by T62 Gaussian grid
Meridional Global by T62 Gaussian grid
Vertical Surface or near the surface
Please check the list of the variables (above) for levels of each variable  
Temporal Jan 1, 1948 to last day of (present - 1) month by 1 day(s)
Static? no
Volume 13MB per variable per year
Server public:
Source http://www.esrl.noaa.gov/psd/data/gridded/data.ncep.reanalysis.surfaceflux.html 
Acquired Feb 7, 2011 (Updated Monthly)
APDRC contact
Supplements

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Daily Means and Other Derived Variables: Tropopause

The NCEP/NCAR Reanalysis 1 project is using a state-of-the-art analysis/forecast system to perform data assimilation using past data from 1948 to the present. A large subset of this data is available from the Physical Sciences Division (PSD) in its original 4 times daily format and as daily averages. However, the data from 1948-1957 is a little different, in the regular (non-Gaussian) gridded data. That data was done at 8 times daily in the model, because the inputs available in that era were available at 3Z, 9Z, 15Z, and 21Z, whereas the 4x daily data has been available at 0Z, 6Z, 12Z, and 18Z. These latter times were forecasted and the combined result for this early era is 8x daily. The local ingestion process took only the 0Z, 6Z, 12Z, and 18Z forecasted values, and thus only those were used to make the daily time series and monthly means here.

Reference:
Kalnay et al., (1996). The NCEP/NCAR 40-year reanalysis project, Bull. Amer. Meteor. Soc., 77, 437-470

Variables (1981-2010 LTM and count available)
Air temperature (degK)
Pressure (Pascals)
Zonal Global by 2.5 deg
Meridional Global by 2.5 deg
Vertical Tropopause  
Temporal Jan 1, 1948 to last day of (present - 1) month by 1 day(s)
Static? no
Volume 7.4MB per variable per year
Server public:
Source http://www.esrl.noaa.gov/psd/data/gridded/data.ncep.reanalysis.derived.tropopause.html 
Acquired Feb 7, 2011 (Updated Monthly)
APDRC contact
Supplements

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