Cloud Amount Statistics (CMATRIX) from the NIMBUS-7 Temperature Humidity Infrared Radiometer (THIR)Entry ID: CMATRIX
Abstract: The CMATRIX cloud data contain daytime and nighttime cloud amounts in percent
cloud cover, cloud amount in low, middle, and high altitude categories, cirrus
and deep convective cloud amount, and radiances of cloud and clear scenes. Both
daily and monthly means are included. The CMATRIX data, available on the 500 km
x 500 km Earth Radiation Budget (ERB) target area grid, also includes the
variances ... of cloud amounts and radiance.
This data set was derived from the Nimbus-7 Temperature Humidity Infrared
Radiometer (THIR) data, the Nimbus-7 Total Ozone Mapping Spectrometer (TOMS)
inferred reflectivity, surface temperature, climatological temperature lapse
rate, and snow/ice data from U. S. Air Force nephanalysis.
The weekly tapes, NCLE, were used to generate CMATRIX tape. There is one
CMATRIX tape per Nimbus-7 data year (November - October) and each data file
contains one month worth of data. Other independent data sets from the
Nimbus-7 ERB and SMMR may be of interest as well as the ISCCP cloud data.
(Click for Interactive Map)
Start Date: 1979-04-01Stop Date: 1985-03-31
Distribution Media: On-line
Role: TECHNICAL CONTACT
Email: gsfc-help-disc at lists.nasa.gov
Goddard Earth Sciences Data and Information Services Center Code 610.2 NASA Goddard Space Flight Center
Province or State: MD
Postal Code: 20771
Hwang, P.H. (ed.), May 1982. Nimbus-7 Temperature Humidity Infrared
Radiometer (THIR) Data User's Guide. NASA/GSFC. Greenbelt,
Hughes, N. A., and A. Hendersen-Seller, 1985. Global 3D-Nephanalysis
of Total Cloud Amount: Climatology for 1979, J. Climate Appl.
Stowe, L.L., 1984.'Evaluation of Nimbus-7 THIR/CLE and Air Force
Three Dimensional Nephanalysis Estimates of Cloud Amount,' J. Geophys. Res., 89:5370-5380.
Stowe, L.L, et al., Sep 1986. Users Guide for the Nimbus-7 NCLE and
CMATRIX THIR/TOMS Cloud Products (draft) [part of the data description
Creation and Review Dates
Last DIF Revision Date: 2002-12-16