International Satellite Cloud Climatology Project (ISCCP) Long-Term Means
A climatology for each month has been established from the initial 5 archived years of ISCCP monthly mean data. Only the complete (ALL) monthly mean data have been averaged. No attempt has been made to correct for biases introduced into the data record (e.g., by changes in the satellite coverage), so the climatologies should be used with caution.SOURCE: ISCCP Monthly Means FORMAT: netCDF GRID: Global - T42 Gaussian (128 x 64) and 2.5 degree (144 x 72) LEVELS: Single Level FIELDS: Description Name Units ---------------------------------------------------------------- Mean frequency of cloudy pixels (A2,A6) ISCCP08 % Marginal VIS/IR cloud amount ISCCP10 % Mean PC for cloudy pixels (A1,A2,A6) ISCCP11 mb Mean TC for cloudy pixels (A1,A2,A4,A6) ISCCP14 K Mean TAU for VIS/IR cloudy pixels (A3,A4,A6) ISCCP17 Average frequency of low-level cloudiness ISCCP23 % Average PC of low-level cloudiness ISCCP24 mb Average TC of low-level cloudiness ISCCP25 K Average frequency of middle-level cloudiness ISCCP26 % Average PC of middle-level cloudiness ISCCP27 mb Average TC of middle-level cloudiness ISCCP28 K Average frequency of high-level cloudiness ISCCP29 % Average PC of high-level cloudiness ISCCP30 mb Average TC of high-level cloudiness ISCCP31 K Average frequency of cumulus cloudiness D ISCCP32 % Average PC of cumulus cloudiness D ISCCP33 mb Average TC of cumulus cloudiness D ISCCP34 K Average TAU of cumulus cloudiness D ISCCP35 Average frequency of stratus cloudiness D ISCCP36 % Average PC of stratus cloudiness D ISCCP37 mb Average TC of stratus cloudiness D ISCCP38 K Average TAU of stratus cloudiness D ISCCP39 Average frequency of altocumulus cloudiness D ISCCP40 % Average PC of altocumulus cloudiness D ISCCP41 mb Average TC of altocumulus cloudiness D ISCCP42 K Average TAU of altocumulus cloudiness D ISCCP43 Average frequency of nimbostratus cloudiness D ISCCP44 % Average PC of nimbostratus cloudiness D ISCCP45 mb Average TC of nimbostratus cloudiness D ISCCP46 K Average TAU of nimbostratus cloudiness D ISCCP47 Average frequency of cirrus cloudiness D ISCCP48 % Average PC of cirrus cloudiness D ISCCP49 mb Average TC of cirrus cloudiness D ISCCP50 K Average TAU of cirrus cloudiness D ISCCP51 Average frequency of cirrostratus cloudiness D ISCCP52 % Average PC of cirrostratus cloudiness D ISCCP53 mb Average TC of cirrostratus cloudiness D ISCCP54 K Average TAU of cirrostratus cloudiness D ISCCP55 Av. frequency of deep convective cloudiness D ISCCP56 % Average PC of deep convective cloudiness D ISCCP57 mb Average TC of deep convective cloudiness D ISCCP58 K Average TAU of deep convective cloudiness D ISCCP59 Mean TS from clear sky composite (A4,A6) ISCCP60 K Mean RS from clear sky composite (A4,A5) ISCCP62 % Mean snow/ice cover ISCCP63 % Surface pressure (TOVS) ISCCP64 mb Near-surface air temperature(TOVS extrapolated) ISCCP65 K Temperature at 500 mb (TOVS) ISCCP66 K Tropopause pressure (TOVS) ISCCP67 mb Tropopause temperature (TOVS) ISCCP68 K Stratosphere temperature at 15 mb ISCCP69 K Precipitable water -- column (TOVS) ISCCP70 cm Ozone -- column (TOVS) ISCCP71 Dobson Average frequency of cloudy pixels--unadjusted ISCCP72 % Definitions: * 2.5 degree gridded data only D Present only during local daytime TAU optical thickness PATH cloud water path PC cloud-top pressure TC cloud-top temperature TS surface temperature RS surface reflectance Adjustments A1,A2,A3,A4,A5, and A6 (see Comments) TIMES: Average of a given month over several years. MSS Directory: /CTSAT/ISCCP/OLD_1991/C2/T42/SAVTAV/ (T42 grid) /CTSAT/ISCCP/OLD_1991/C2/2.5DG/SAVTAV/ (2.5 degree grid) Filename: MMMy1y2.nc where MMM=month, y1=starting year, y2=ending year One mean per file. e.g. JAN8391.nc for mean of Januaries 1983-91. Current holdings: ------------------------------------- /CTSAT/ISCCP/OLD_1991/C2/T42/SAVTAV/JAN8391.nc /CTSAT/ISCCP/OLD_1991/C2/T42/SAVTAV/FEB8391.nc /CTSAT/ISCCP/OLD_1991/C2/T42/SAVTAV/MAR8391.nc /CTSAT/ISCCP/OLD_1991/C2/T42/SAVTAV/APR8391.nc /CTSAT/ISCCP/OLD_1991/C2/T42/SAVTAV/MAY8391.nc /CTSAT/ISCCP/OLD_1991/C2/T42/SAVTAV/JUN8391.nc /CTSAT/ISCCP/OLD_1991/C2/T42/SAVTAV/JUL8391.nc /CTSAT/ISCCP/OLD_1991/C2/T42/SAVTAV/AUG8391.nc /CTSAT/ISCCP/OLD_1991/C2/T42/SAVTAV/SEP8391.nc /CTSAT/ISCCP/OLD_1991/C2/T42/SAVTAV/OCT8391.nc /CTSAT/ISCCP/OLD_1991/C2/T42/SAVTAV/NOV8391.nc /CTSAT/ISCCP/OLD_1991/C2/T42/SAVTAV/DEC8391.nc /CTSAT/ISCCP/OLD_1991/C2/T42/SAVTAV/T42_JUL83JUN91_CLIMATOLOGY.nc /CTSAT/ISCCP/OLD_1991/C2/2.5DG/SAVTAV/JAN8391.nc /CTSAT/ISCCP/OLD_1991/C2/2.5DG/SAVTAV/FEB8391.nc /CTSAT/ISCCP/OLD_1991/C2/2.5DG/SAVTAV/MAR8391.nc /CTSAT/ISCCP/OLD_1991/C2/2.5DG/SAVTAV/APR8391.nc /CTSAT/ISCCP/OLD_1991/C2/2.5DG/SAVTAV/MAY8391.nc /CTSAT/ISCCP/OLD_1991/C2/2.5DG/SAVTAV/JUN8391.nc /CTSAT/ISCCP/OLD_1991/C2/2.5DG/SAVTAV/JUL8391.nc /CTSAT/ISCCP/OLD_1991/C2/2.5DG/SAVTAV/AUG8391.nc /CTSAT/ISCCP/OLD_1991/C2/2.5DG/SAVTAV/SEP8391.nc /CTSAT/ISCCP/OLD_1991/C2/2.5DG/SAVTAV/OCT8391.nc /CTSAT/ISCCP/OLD_1991/C2/2.5DG/SAVTAV/NOV8391.nc /CTSAT/ISCCP/OLD_1991/C2/2.5DG/SAVTAV/DEC8391.nc /CTSAT/ISCCP/OLD_1991/C2/2.5DG/SAVTAV/2.5DG_JUL83JUN91_CLIMATOLOGY.nc Please note the original CAS Data Catalog (SAVTAV) Files can also be found in the /CTSAT/ISCCP/OLD_1991/C2/T42/SAVTAV and /CTSAT/ISCCP/OLD_1991/C2/2.5DG/SAVTAV directories
Other Products Derived from this Dataset:
Comments on Data
Please use the ccm2nc software to convert ccm history tape format to netCDF.
References
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