These are the variables included for the ISCCP Stage C2 data: Variable # Code * Description * ---------- ------ ------------------------------------------------------- 1 Latitude index (equal-area) 2 Longitude index (equal-area) 3 Lower longitude index (2.5 deg square) 4 Upper longitude index (2.5 deg square) 5 Land/water/coast code 6 GMT 00-21: Total number of days in average (day+night) GMT all: Total number of GMTS in average (day+night) 7 GMT 00-21: Total number of days in average (day) GMT all: Total number of GMTS in average (day) 8 Mean frequency of cloudy pixels (Adj2. Adj6) 9 GMT 00-21: Number of days with cloudy pixels > 0 GMT all: Mean freq of cloudy days 10 Marginal VIS/IR cloud amount 11 Mean PC for cloudy pixels (Adj1, Adj2, Adj6) 12 Time-sigma PC for IR-cloudy pixels 13 Mean space-sigma PC for IR-cloudy pixels 14 Mean TC for cloudy pixels (Adj1, Adj2, Adj4, Adj6) 15 Time-sigma TC for IR-cloudy pixels 16 Mean space-sigma TC for IR-cloudy pixels 17 Mean TAU for VIS/IR-cloudy pixels (Adj3, Adj4, Adj6) 18 D Time-sigma TAU for VIS/IR-cloudy pixels 19 D Mean space-sigma TAU for VIS/IR-cloudy pixels 20 Mean path for VIS/IR-cloudy pixels 21 D Time-sigma path for VIS/IR-cloudy pixels 22 D Mean space-sigma path for VIS/IR-cloudy pixels 23 Avg freq of low level cloudiness 24 Avg PC of low level cloudiness 25 Avg TC of low level cloudiness 26 Avg freq of middle level cloudiness 27 Avg PC of middle level cloudiness 28 Avg TC of middle level cloudiness 29 Avg freq of high level cloudiness 30 Avg PC of high level cloudiness 31 Avg TC of high level cloudiness 32 D Avg freq of cumulus cloudiness 33 D Avg PC of cumulus cloudiness 34 D Avg TC of cumulus cloudiness 35 D Avg TAU of cumulus cloudiness 36 D Avg freq of stratus cloudiness 37 D Avg PC of stratus cloudiness 38 D Avg TC of stratus cloudiness 39 D Avg TAU of stratus cloudiness 40 D Avg freq of altocumulus cloudiness 41 D Avg PC of altocumulus cloudiness 42 D Avg TC of altocumulus cloudiness 43 D Avg TAU of altocumulus cloudiness 44 D Avg freq of nimbostratus cloudiness 45 D Avg PC of nimbostratus cloudiness 46 D Avg TC of nimbostratus cloudiness 47 D Avg TAU of nimbostratus cloudiness 48 D Avg freq of cirrus cloudiness 49 D Avg PC of cirrus cloudiness 50 D Avg TC of cirrus cloudiness 51 D Avg TAU of cirrus cloudiness 52 D Avg freq of cirrostratus cloudiness 53 D Avg PC of cirrostratus cloudiness 54 D Avg TC of cirrostratus cloudiness 55 D Avg TAU of cirrostratus cloudiness 56 D Avg freq of deep convective cloudiness 57 D Avg PC of deep convective cloudiness 58 D Avg TC of deep convective cloudiness 59 D Avg TAU of deep convective cloudiness 60 Mean TS from clear sky composite (Adj4, Adj6) 61 Time-sigma TS from clear sky composite 62 D Mean RS from clear sky composite (Adj4, Adj5) 63 Mean snow/ice cover 64 Surface pressure (TOVS) 65 Near-surface air temperature (TOVS extrapolated) 66 Temperature at 500 mb (TOVS) 67 Tropopause pressure (TOVS) 68 Tropopause temperature (TOVS) 69 Stratosphere temperature at 15 mb (TOVS) 70 Precipitable water - column (TOVS) 71 Ozone - column (TOVS) 72 Mean freq of cloud pixels - unadjusted * The following applies to ISCCP-C2 variables: D: indicates variables present only during local daytime TAU: cloud optical thickness PATH: cloud water path PC: cloud top pressure TC: cloud top temperature TS: surface temperature RS: surface reflectance SIGMA: standard deviation over spatial or time domains GMT 00-21: indicates hour-monthly mean datasets GMT ALL: indicates monthly mean datasets