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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



SYN/AVG/ZAVG Product Availability


SYN/AVG/ZAVG Product Processing Status ( by year / by month / by product edition)
Product Sat
Level 3
SYN Terra
Aqua
AVG Terra
Aqua
ZAVG Terra
Aqua
2000 2001 2002 2003 2004 2005
Level 3
Mar  Terra SYN /2000 Available   Terra SYN /2001 Available   Terra SYN /2002 Available   Terra SYN /2003 Available   Terra SYN /2004 Available Oct Terra SYN /2005 Available
 Aqua SYN /2000 Not Available  Aqua SYN /2001 Not Available Jul  Aqua SYN /2002 Available   Aqua SYN /2003 Available   Aqua SYN /2004 Available Oct Aqua SYN /2005 Available
Mar  Terra AVG /2000 Available   Terra AVG /2001 Available   Terra AVG /2002 Available   Terra AVG /2003 Available   Terra AVG /2004 Available Oct Terra AVG /2005 Available
 Aqua AVG /2000 Not Available  Aqua AVG /2001 Not Available Jul  Aqua AVG /2002 Available   Aqua AVG /2003 Available   Aqua AVG /2004 Available Oct Aqua AVG /2005 Available
Mar  Terra ZAVG /2000 Available   Terra ZAVG /2001 Available   Terra ZAVG /2002 Available   Terra ZAVG /2003 Available   Terra ZAVG /2004 Available Oct Terra ZAVG /2005 Available
 Aqua ZAVG /2000 Not Available  Aqua ZAVG /2001 Not Available Jul  Aqua ZAVG /2002 Available   Aqua ZAVG /2003 Available   Aqua ZAVG /2004 Available Oct Aqua ZAVG /2005 Available


Legend
 Terra Available  Aqua Available  S-NPP Available  Combined Available
 Not Available (odd rows)  Not Available (even rows)

  • By clicking on "by month", a more detailed table will be rendered with the ability to click on specific months for daily and hourly Level 2 and Level 1B products.
  • By clicking on "by product edition", a more detailed table will be rendered with the versions of the product available.

CERES Instrument Temporal Coverage
Spacecraft Instrument(s) Launch Date Start Date End Date
TRMM PFM 11/27/1997 12/27/1997 05/29/2001
Terra FM1 & FM2 12/18/1999 02/25/2000 Still in operation
Aqua FM3 & FM4 05/04/2002 06/19/2002 Still in operation
S-NPP FM5 10/28/2011 01/27/2012 Still in operation





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Page Curator: Edward Kizer
Page Last Modified: 02/17/2017 10:35:42 EST
Site Last Modified: 02/22/2017 13:50:06 EST