ISCCP-D2 variables.
Variables labelled with 'd' are defined only for local daytime, and
are undefined at night.
cloudy = IR or VIS or NI cloudy
VIS/IR-cloudy = IR or VIS cloudy
IR-cloudy = IR cloudy
IR-only-cloudy = IR cloudy and VIS clear
NI-cloudy = NI cloudy
NI-only-cloudy = NI cloudy and ( IR and VIS clear )
VIS-only-cloudy = VIS cloudy and IR clear
IR-marginally-cloudy = IR marginally cloudy
VIS/IR-marginally-cloudy = VIS or IR marginally cloudy
NI-marginally-cloudy = NI marginally cloudy
NI-only-marginally-cloudy = NI marginally cloudy and ( IR and VIS clear
)
clear = IR and VIS and NI clear
IR-clear = IR clear
VIS/IR-clear = IR and VIS clear
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Box identification
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1
Latitude index (equal-area and equal-angle)
2
Longitude index (equal-area)
3
Western-most longitude index (equal-angle)
4
Eastern-most longitude index (equal-angle)
5
Land/water/coast code
6
Number of observations
7
Number of day-time observations
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Cloud amount (CA)
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8
Mean cloud amount
9
Mean IR-marginal cloud amount
10
Frequency of mean cloud amount 0-10%
11
Frequency of mean cloud amount 10-20%
12
Frequency of mean cloud amount 20-30%
13
Frequency of mean cloud amount 30-40%
14
Frequency of mean cloud amount 40-50%
15
Frequency of mean cloud amount 50-60%
16
Frequency of mean cloud amount 60-70%
17
Frequency of mean cloud amount 70-80%
18
Frequency of mean cloud amount 80-90%
19
Frequency of mean cloud amount 90-100%
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Mean cloud top pressure (PC)
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20
Mean cloud pressure
21
Standard deviation over time
22
Mean standard deviation over space
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Mean cloud top temperature (TC)
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23
Mean cloud temperature
24
Standard deviation over time
25
Mean standard deviation over space
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Mean cloud optical thickness (TAU)
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26
Mean cloud TAU
27
Standard deviation over time
28
Mean standard deviation over space
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Mean cloud water path (WP)
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29
Mean cloud WP
30
Standard deviation over time
31
Mean standard deviation over space
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IR cloud types
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32
Mean low cloud amount
33
Mean PC for low clouds
34
Mean TC for low clouds
35
Mean middle cloud amount
36
Mean PC for middle clouds
37
Mean TC for middle clouds
38
Mean high cloud amount
39
Mean PC for high clouds
40
Mean TC for high clouds
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LOW cloud types (vis-adjusted TC)
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41d
Mean CA for cloud type 1 = Cumulus,liquid
42d
Mean PC for cloud type 1
43d
Mean TC for cloud type 1
44d
Mean TAU for cloud type 1
45d
Mean WP for cloud type 1
46d
Mean CA for cloud type 2 = Stratocumulus,liquid
47d
Mean PC for cloud type 2
48d
Mean TC for cloud type 2
49d
Mean TAU for cloud type 2
50d
Mean WP for cloud type 2
51d
Mean CA for cloud type 3 = Stratus,liquid
52d
Mean PC for cloud type 3
53d
Mean TC for cloud type 3
54d
Mean TAU for cloud type 3
55d
Mean WP for cloud type 3
56d
Mean CA for cloud type 4 = Cumulus,ice
57d
Mean PC for cloud type 4
58d
Mean TC for cloud type 4
59d
Mean TAU for cloud type 4
60d
Mean WP for cloud type 4
61d
Mean CA for cloud type 5 = Stratocumulus,ice
62d
Mean PC for cloud type 5
63d
Mean TC for cloud type 5
64d
Mean TAU for cloud type 5
65d
Mean WP for cloud type 5
66d
Mean CA for cloud type 6 = Stratus,ice
67d
Mean PC for cloud type 6
68d
Mean TC for cloud type 6
69d
Mean TAU for cloud type 6
70d
Mean WP for cloud type 6
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MIDDLE cloud types (VIS-adjusted TC)
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71d
Mean CA for cloud type 7 = Altocumulus,liquid
72d
Mean PC for cloud type 7
73d
Mean TC for cloud type 7
74d
Mean TAU for cloud type 7
75d
Mean WP for cloud type 7
76d
Mean CA for cloud type 8 = Altostratus,liquid
77d
Mean PC for cloud type 8
78d
Mean TC for cloud type 8
79d
Mean TAU for cloud type 8
80d
Mean WP for cloud type 8
81d
Mean CA for cloud type 9 = Nimbostratus,liquid
82d
Mean PC for cloud type 9
83d
Mean TC for cloud type 9
84d
Mean TAU for cloud type 9
85d
Mean WP for cloud type 9
86d
Mean CA for cloud type 10 = Altocumulus,ice
87d
Mean PC for cloud type 10
88d
Mean TC for cloud type 10
89d
Mean TAU for cloud type 10
90d
Mean WP for cloud type 10
91d
Mean CA for cloud type 11 = Altostratus,ice
92d
Mean PC for cloud type 11
93d
Mean TC for cloud type 11
94d
Mean TAU for cloud type 11
95d
Mean WP for cloud type 11
96d
Mean CA for cloud type 12 = Nimbostratus,ice
97d
Mean PC for cloud type 12
98d
Mean TC for cloud type 12
99d
Mean TAU for cloud type 12
100d
Mean WP for cloud type 12
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HIGH cloud types (VIS-adjusted TC)
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101d
Mean CA for cloud type 13 = Cirrus
102d
Mean PC for cloud type 13
103d
Mean TC for cloud type 13
104d
Mean TAU for cloud type 13
105d
Mean WP for cloud type 13
106d
Mean CA for cloud type 14 = Cirrostratus
107d
Mean PC for cloud type 14
108d
Mean TC for cloud type 14
109d
Mean TAU for cloud type 14
110d
Mean WP for cloud type 14
111d
Mean CA for cloud type 15 = Deep convective
112d
Mean PC for cloud type 15
113d
Mean TC for cloud type 15
114d
Mean TAU for cloud type 15
115d
Mean WP for cloud type 15
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Mean surface temperature (TS)
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116
Mean TS from clear sky composite
117
Standard deviation over space
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Mean surface reflectance (RS)
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118d
Mean RS from clear sky composite
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Snow/Ice cover
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119d
Mean snow/ice amount
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TOVS atmospheric information
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120
Mean Surface pressure
121
Mean Near-surface air temperature
122
Mean Temperature at 740 mb
123
Mean Temperature at 500 mb
124
Mean Temperature at 375 mb
125
Mean Tropopause pressure
126
Mean Tropopause temperature
127
Mean Stratosphere temperature at 50 mb
128
Mean Precipitable water for 1000-680 mb
129
Mean Precipitable water for 680-310 mb
130
Mean Ozone abundance