The table below shows the calibration scales used for data.
Metadata are subject to change without notice.
No |
Scale |
Gas Species |
No |
WDCGG Code |
1
|
WMO CO2 X2007
|
1001
|
CO2
|
2
|
WMO CH4 X2004
|
1002
|
CH4
|
3
|
WMO CH4 X2004A
|
1002
|
CH4
|
4
|
WMO N2O X2006
|
1003
|
N2O
|
5
|
WMO N2O X2006A
|
1003
|
N2O
|
6
|
WMO SF6 X2014
|
1004
|
SF6
|
7
|
WMO CO X2014
|
3001
|
CO
|
8
|
WMO CO X2014A
|
3001
|
CO
|
10
|
The gravimetric standard gas of ppt order concentration.
|
1201
|
CCl4
|
11
|
The gravimetric standard gas of ppt order concentration.
|
1202
|
CH3CCl3
|
12
|
The gravimetric standard gas of ppt order concentration.
|
1301
|
CFC-113
|
13
|
The gravimetric standard gas of ppt order concentration.
|
1302
|
CFC-12
|
14
|
The gravimetric standard gas of ppt order concentration.
|
1303
|
CFC-11
|
15
|
WMO CO X2004
|
3001
|
CO
|
16
|
Delta 14C
|
6001
|
14CO2
|
17
|
SIO-98
|
1003
|
N2O
|
18
|
SIO-05
|
1202
|
CH3CCl3
|
19
|
SIO-05
|
1201
|
CCl4
|
20
|
SIO-05
|
1302
|
CFC-12
|
21
|
SIO-05
|
1303
|
CFC-11
|
22
|
SIO-05
|
1301
|
CFC-113
|
23
|
Tohoku University
|
1002
|
CH4
|
24
|
SIO-16
|
1003
|
N2O
|
25
|
SIO-98
|
3004
|
CHCl3
|
26
|
CSIRO-94
|
3001
|
CO
|
27
|
SIO-05
|
1004
|
SF6
|
28
|
WMO H2 X2009 (MPI-2009)
|
4001
|
H2
|
29
|
SIO-14
|
1505
|
HFC-245fa
|
30
|
SIO-07
|
1510
|
HFC-32
|
31
|
SIO-05
|
1401
|
HCFC-141b
|
32
|
SIO-05
|
1702
|
CBrF3
|
33
|
SIO-05
|
1701
|
CBrClF2
|
34
|
SIO-14
|
1506
|
HFC-227ea
|
35
|
SIO-05
|
1503
|
HFC-152a
|
36
|
NOAA 2003B
|
3012
|
C2Cl4
|
37
|
METAS-2017
|
1306
|
CFC-13
|
38
|
SIO-05
|
1508
|
HFC-134a
|
39
|
SIO-05
|
1305
|
CFC-114
|
40
|
SIO-05
|
1403
|
HCFC-22
|
41
|
SIO-05
|
3005
|
CH3Cl
|
42
|
SIO-14
|
3006
|
CH2Cl2
|
43
|
UB-98
|
3011
|
C2HCl3
|
44
|
SIO-14
|
1501
|
HFC-125
|
45
|
SIO-05
|
3009
|
CH3Br
|
46
|
SIO-05
|
1402
|
HCFC-142b
|
47
|
SIO-14
|
1507
|
HFC-365mfc
|
48
|
SIO-07
|
1602
|
PFC-218
|
49
|
SIO-05
|
1304
|
CFC-115
|
50
|
SIO-07
|
1509
|
HFC-143a
|
51
|
SIO-07
|
1005
|
SO2F2
|
52
|
SIO-07
|
1601
|
PFC-116
|
53
|
SIO-14
|
1504
|
HFC-236fa
|
54
|
SIO-05
|
1603
|
PFC-14
|
55
|
SIO-12
|
1006
|
NF3
|
56
|
SIO-14
|
1511
|
HFC-4310mee
|
57
|
SIO-14
|
1703
|
C2Br2F4
|
58
|
SIO-07
|
1502
|
HFC-23
|
59
|
WMO CO2 X1993
|
1001
|
CO2
|
60
|
Tohoku University 1983
|
1001
|
CO2
|
61
|
WMO CO2 X1987
|
1001
|
CO2
|
62
|
SIO-86
|
1302
|
CFC-12
|
63
|
SIO-86
|
1303
|
CFC-11
|
64
|
WMO N2O X1997
|
1003
|
N2O
|
65
|
SIO-97
|
1002
|
CH4
|
66
|
WMO CO2 X1997
|
1001
|
CO2
|
67
|
WMO CO2 X1981
|
1001
|
CO2
|
68
|
VPDB
|
1101
|
13CH4
|
69
|
VSMOW
|
1104
|
CH3D
|
70
|
VPDB-CO2
|
1103
|
C18O2
|
71
|
VPDB-CO2
|
1102
|
13CO2
|
72
|
NOAA 2006
|
1701
|
CBrClF2
|
73
|
NOAA 2004
|
3007
|
CH3I
|
74
|
NOAA 1992
|
1303
|
CFC-11
|
75
|
NOAA 2002
|
1201
|
CCl4
|
76
|
NOAA 1995
|
1508
|
HFC-134a
|
77
|
NOAA 2006
|
1702
|
CBrF3
|
78
|
NOAA 1992
|
3006
|
CH2Cl2
|
79
|
NOAA 2003
|
1202
|
CH3CCl3
|
80
|
NOAA 2003
|
3010
|
CH2Br2
|
81
|
NOAA 2001
|
1302
|
CFC-12
|
82
|
NOAA 1992
|
3004
|
CHCl3
|
83
|
NOAA 2003
|
3009
|
CH3Br
|
84
|
NOAA 2002
|
1301
|
CFC-113
|
85
|
NOAA 2003
|
3005
|
CH3Cl
|
86
|
MRI-87
|
1001
|
CO2
|
87
|
PDB
|
1102
|
13CO2
|
88
|
NOAA 1983
|
1002
|
CH4
|
89
|
WMO CO2 X2001
|
1001
|
CO2
|
90
|
KRISS
|
1001
|
CO2
|
91
|
NOAA 2008
|
1201
|
CCl4
|
92
|
WMO CO2 X1974
|
1001
|
CO2
|
93
|
WMO CO X2000
|
3001
|
CO
|
94
|
NOAA 2016
|
1303
|
CFC-11
|
95
|
NIST
|
1001
|
CO2
|
96
|
NOAA 2008
|
1302
|
CFC-12
|
97
|
The gravimetric standard gas of ppb order concentration.
|
1002
|
CH4
|
98
|
The gravimetric standard gas of ppb order concentration.
|
1003
|
N2O
|
99
|
Tohoku University 2010
|
1001
|
CO2
|
100
|
NIES96
|
1003
|
N2O
|
101
|
NIES95
|
1001
|
CO2
|
102
|
NIES
|
1002
|
CH4
|
103
|
NOAA 2006
|
1403
|
HCFC-22
|
104
|
NOAA 2003
|
1301
|
CFC-113
|
105
|
NOAA 2004
|
1503
|
HFC-152a
|
106
|
NOAA 1994
|
1402
|
HCFC-142b
|
107
|
NOAA 1994
|
1401
|
HCFC-141b
|
108
|
NOAA 2003
|
3006
|
CH2Cl2
|
109
|
NOAA 2003
|
3012
|
C2Cl4
|
110
|
VPDB-CO2
|
1101
|
13CH4
|
111
|
NOAA 1996
|
4001
|
H2
|
112
|
PDB
|
1103
|
C18O2
|
113
|
NIST
|
3001
|
CO
|
114
|
The gravimetric standard gas of ppb order concentration.
|
1301
|
CFC-113
|
115
|
The gravimetric standard gas of ppb order concentration.
|
1302
|
CFC-12
|
116
|
The gravimetric standard gas of ppb order concentration.
|
1303
|
CFC-11
|
117
|
The gravimetric standard gas of ppm order concentration.
|
1002
|
CH4
|
118
|
NIES94
|
1002
|
CH4
|
119
|
NIES09
|
1001
|
CO2
|
120
|
WMO SF6 X2006
|
1004
|
SF6
|
121
|
KRISS
|
1303
|
CFC-11
|
122
|
KRISS
|
1002
|
CH4
|
123
|
KRISS
|
1302
|
CFC-12
|
124
|
KRISS
|
1003
|
N2O
|
125
|
KRISS
|
1301
|
CFC-113
|
126
|
WMO CO2 X1985
|
1001
|
CO2
|
127
|
WMO CO2 X2002
|
1001
|
CO2
|
128
|
NMI PRM AC11
|
3001
|
CO
|
129
|
NIST SRM 1677c
|
3001
|
CO
|
130
|
NIST SRM 2612a
|
3001
|
CO
|
131
|
NPL PRGM in synth. Air
|
3001
|
CO
|
133
|
CPT
|
3001
|
CO
|
134
|
SIO-05
|
3013
|
CHBr3
|
135
|
SIO-05
|
3004
|
CHCl3
|
136
|
SIO-05
|
1501
|
HFC-125
|
137
|
SIO-05
|
3006
|
CH2Cl2
|
138
|
SIO-05
|
1509
|
HFC-143a
|
139
|
SIO-05
|
3010
|
CH2Br2
|
140
|
SIO-05
|
1510
|
HFC-32
|
141
|
UB-98
|
3006
|
CH2Cl2
|
142
|
NOAA-Jul10-p
|
3010
|
CH2Br2
|
143
|
NOAA-Dec09-p
|
3013
|
CHBr3
|
144
|
NIST
|
1002
|
CH4
|
145
|
NOAA-Dec09
|
3007
|
CH3I
|
146
|
SIO-14
|
1604
|
PFC-318
|
147
|
NOAA-SIO-p
|
1007
|
COS
|
148
|
NPL PRGM NG677 in synth. Air
|
3001
|
CO
|
149
|
KRISS
|
3001
|
CO
|
150
|
MRI scale
|
1002
|
CH4
|
151
|
MRI scale
|
3001
|
CO
|
152
|
NIES-08
|
1303
|
CFC-11
|
153
|
ICOS
|
1001
|
CO2
|
154
|
ICOS
|
1002
|
CH4
|
155
|
UB-98
|
1404
|
HCFC-124
|
156
|
TU-1987
|
1002
|
CH4
|
157
|
WMO CO X1988
|
3001
|
CO
|
158
|
WMO CO2 X2019
|
1001
|
CO2
|
159
|
The gravimetric standard gas of ppt order concentration
|
1509
|
HFC-143a
|
160
|
The gravimetric standard gas of ppt order concentration
|
1501
|
HFC-125
|
161
|
The gravimetric standard gas of ppt order concentration
|
1502
|
HFC-23
|
162
|
The gravimetric standard gas of ppt order concentration
|
1503
|
HFC-152a
|
163
|
The gravimetric standard gas of ppt order concentration
|
1510
|
HFC-32
|
164
|
The gravimetric standard gas of ppt order concentration
|
1508
|
HFC-134a
|
165
|
The gravimetric standard gas of ppt order concentration
|
1505
|
HFC-245fa
|
166
|
The gravimetric standard gas of ppt order concentration
|
1506
|
HFC-227ea
|
167
|
METAS-2017
|
1405
|
HCFC-132b
|
168
|
Empa-2013
|
1406
|
HCFC-133a
|
169
|
NOAA-2018-PR1
|
1501
|
HFC-125
|
170
|
NOAA-2016-PR1
|
1509
|
HFC-143a
|
171
|
NOAA-2016-PR1
|
1510
|
HFC-32
|
172
|
NOAA-2016-PR1
|
1702
|
CBrF3
|
173
|
CSIRO-2020
|
3001
|
CO
|
175
|
EMRI/AIST scale
|
7001
|
O2/N2 ratio
|
176
|
Nagoya university original radon-222 scale
|
6002
|
222Rn
|
177
|
NPL PRGM 2851 in synth. air
|
3001
|
CO
|
178
|
NIES01
|
1004
|
SF6
|
8888
|
Unknown
|
9999
|
NA
|
Total: 176