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CERES SYN/AVG/ZAVG Product Information


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SYN/AVG/ZAVG Documentation

  • Data Quality Summary link to external site — Highlights the accuracy of this product as determined by the CERES Science Team.

SYN/AVG/ZAVG Product Features

  • The Synoptic Radiative Fluxes and Clouds (SYN) product contains a day of space and time averaged Clouds and the Earth's Radiant Energy System (CERES) data for a single scanner instrument.
  • The 1-degree regional flux at the hour of observation from the CERES FSW product and concurrent diurnal data from geostationary satellites are used to estimate the regional flux at 3-hour GMT based intervals.
  • Also at 3-hour intervals are estimates of the adjusted (tuned) fluxes at the five atmospheric levels as defined by the CERES CRS product for both clear-sky and total-sky scenes, estimates of the average cloud parameters in four cloud height categories, and averaged cloud parameters.
  • The SYN contains the following apriori and observed input:
    • Regional data
    • Cloud category properties for four (low, lower middle, upper middle and high) cloud layers
    • Observed CERES TOA clear-sky and all-sky fluxes
    • MODIS based spectral aerosol optical depths
  • The SYN contains the following constrained (tuned) vertical flux profiles for both clear-sky and total-sky conditions evaluated at the TOA, 70mb, 200mb, 500mb, and surface:
    • Longwave, Shortwave, and Window channels upward and downward.
  • The constrained (tuned) and initial (untuned) profiles for the following are included for pristine (clear-sky no-aerosol), clear-sky, total-sky-no-aerosol, and total-sky conditions:
    • Longwave upward at the surface and TOA.
    • Longwave downward at the surface.
    • Shortwave upward at the surface and TOA.
    • Shortwave downward at the surface.
    • Window channel upward at the surface and TOA.
    • Window channel downward at the surface.
  • The adjustments to the radiative transfer model input parameters between the initial and the constrained (adjusted) passes are also contained on the SYN. These parameters include:
    • Surface albedo and skin temperature
    • Total column precipitable water, upper tropospheric relative humidity, and column ozone
    • Aerosol optical depth
    • Cloud optical depth, fractional area, and effective temperature
  • The SYN contains the direct and diffuse shortwave surface fluxes for total-sky, clear-sky, pristine and actinic conditions.
  • The SYN also contains surface UVA and UVB downwelling and direct diffuse ratios for total-sky, clear-sky, pristine, and total-sky-no-aerosol conditions.
  • The monthly Regional Radiative Fluxes and Clouds (AVG) product contains monthly and monthly 3-hourly averages of the Synoptic Radiative Fluxes and Clouds (SYN) product.
  • The monthly Zonal and Global Radiative Fluxes and Clouds (ZAVG) product are the zonal and global averages of the monthly Regional Radiative and Clouds (AVG) product.

SYN/AVG/ZAVG Processing Flowchart


Image: SYN-AVG-ZAVG Processing Flowchart



SYN/AVG/ZAVG Product Parameters


TOA Fluxes
(observed & computed)
Surface Fluxes
(computed)
In-Atmospheric Fluxes
(computed)
Cloud Properties
(MODIS and GEO)
[Diurnally Complete]
Aerosols
(MODIS & MATCH)
Auxiliary Data
(GMAO GEOS)
  • Shortwave Flux
  • Longwave Flux
  • Window-region Flux (8-12µm)
  • Downwelling UVA & UVB Fluxes (computed only)
  • Downwelling PAR Flux (computed only)
  • Shortwave Flux - Up
  • Longwave Flux - Up
  • Window-region Flux - Up
  • Shortwave Flux - Down
  • Longwave Flux - Down
  • Window-region Flux - Down
  • Surface Albedo
  • Shortwave Direct/Diffuse Fluxes
  • UVA & UVB Fluxes
  • PAR Direct/Diffuse Fluxes
  • Shortwave Flux - Up
  • Longwave Flux - Up
  • Window-region Flux - Up
  • Shortwave Flux - Down
  • Longwave Flux - Down
  • Window-region Flux - Down
  • Cloud Area Fraction
  • Cloud Effective Pressure
  • Cloud Effective Temperature
  • Cloud Effective Height
  • Cloud Top Pressure
  • Cloud Base Pressure
  • Cloud Particle Phase
  • Liquid Water Path
  • Ice Water Path
  • Water Particle Radius
  • Ice Particle Effective Diameter
  • Cloud Visible Optical Depth
  • MATCH Total Aerosol Optical Depth @ 0.55µm
  • MODIS Aerosol Optical Depths over Land & Ocean
  • Surface Type Percent Coverage
  • Skin Temperature
  • Total Column Precipitable Water
  • Upper Tropospheric Precipitable Water
  • Column Ozone



SYN/AVG/ZAVG Spatial and Temporal Resolutions


 

Spatial Resolutions

Temporal
Resolutions

Regional grid
(1°x1° latitude by longitude)
Zonal grid
(1° latitude)
Global
Monthly AVG ZAVG ZAVG
Monthly 3-Hourly AVG ZAVG ZAVG
3-Hourly SYN N/A N/A







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  Image: NASA Logo NASA Official: Dr. Norman Loeb
Page Curator: Edward Kizer
Page Last Modified: 10/16/2017 11:05:05 EST
Site Last Modified: 11/07/2017 17:18:43 EST