Monthly atmospheric N2O concentrations worldwide 2025| ��ƽ��

Globally-averaged, monthly mean atmospheric nitrous oxide (N₂O) abundance from January 2001 to May 2025 (in parts per billion)

Characteristic	Concentration in parts per billion (ppb)
May '25	338.66
Apr '25	338.66
Mar '25	338.6
Feb '25	338.53
Jan '25	338.44
Dec '24	338.29
Nov '24	338.08
Oct '24	337.86
Sep '24	337.68
Aug '24	337.63
Jul '24	337.66
Jun '24	337.69
May '24	337.66
Apr '24	337.6
Mar '24	337.57
Feb '24	337.54
Jan '24	337.46
Dec '23	337.3
Nov '23	337.09
Oct '23	336.89
Sep '23	336.74
Aug '23	336.65
Jul '23	336.61
Jun '23	336.57
May '23	336.54
Apr '23	336.55
Mar '23	336.53
Feb '23	336.49
Jan '23	336.41
Dec '22	336.29
Nov '22	336.12
Oct '22	335.92
Sep '22	335.75
Aug '22	335.63
Jul '22	335.54
Jun '22	335.47
May '22	335.45
Apr '22	335.43
Mar '22	335.38
Feb '22	335.31
Jan '22	335.22
Dec '21	335.05
Nov '21	334.85
Oct '21	334.63
Sep '21	334.41
Aug '21	334.23
Jul '21	334.15
Jun '21	334.12
May '21	334.1
Apr '21	334.06
Mar '21	334.01
Feb '21	333.96
Jan '21	333.88
Dec '20	333.76
Nov '20	333.6
Oct '20	333.42
Sep '20	333.26
Aug '20	333.15
Jul '20	333.02
Jun '20	332.88
May '20	332.78
Apr '20	332.71
Mar '20	332.63
Feb '20	332.56
Jan '20	332.5
Dec '19	332.4
Nov '19	332.26
Oct '19	332.08
Sep '19	331.93
Aug '19	331.89
Jul '19	331.85
Jun '19	331.74
May '19	331.64
Apr '19	331.62
Mar '19	331.67
Feb '19	331.75
Jan '19	331.79
Dec '18	331.68
Nov '18	331.48
Oct '18	331.28
Sep '18	331.08
Aug '18	330.88
Jul '18	330.75
Jun '18	330.7
May '18	330.69
Apr '18	330.71
Mar '18	330.69
Feb '18	330.6
Jan '18	330.45
Dec '17	330.29
Nov '17	330.15
Oct '17	330.01
Sep '17	329.87
Aug '17	329.79
Jul '17	329.7
Jun '17	329.58
May '17	329.52
Apr '17	329.53
Mar '17	329.54
Feb '17	329.52
Jan '17	329.46
Dec '16	329.36
Nov '16	329.23
Oct '16	329.05
Sep '16	328.86
Aug '16	328.78
Jul '16	328.84
Jun '16	328.91
May '16	328.91
Apr '16	328.88
Mar '16	328.88
Feb '16	328.9
Jan '16	328.87
Dec '15	328.77
Nov '15	328.61
Oct '15	328.42
Sep '15	328.24
Aug '15	328.12
Jul '15	328.03
Jun '15	327.95
May '15	327.92
Apr '15	327.97
Mar '15	328.04
Feb '15	328.04
Jan '15	327.98
Dec '14	327.87
Nov '14	327.72
Oct '14	327.52
Sep '14	327.34
Aug '14	327.19
Jul '14	327.03
Jun '14	326.89
May '14	326.82
Apr '14	326.79
Mar '14	326.72
Feb '14	326.66
Jan '14	326.61
Dec '13	326.52
Nov '13	326.38
Oct '13	326.2
Sep '13	326.05
Aug '13	325.98
Jul '13	325.96
Jun '13	325.9
May '13	325.81
Apr '13	325.74
Mar '13	325.68
Feb '13	325.63
Jan '13	325.58
Dec '12	325.53
Nov '12	325.43
Oct '12	325.28
Sep '12	325.12
Aug '12	324.97
Jul '12	324.87
Jun '12	324.86
May '12	324.9
Apr '12	324.92
Mar '12	324.95
Feb '12	324.97
Jan '12	324.9
Dec '11	324.77
Nov '11	324.64
Oct '11	324.45
Sep '11	324.24
Aug '11	324.1
Jul '11	324.05
Jun '11	324.05
May '11	324.05
Apr '11	324.06
Mar '11	324.07
Feb '11	324.07
Jan '11	324.03
Dec '10	323.92
Nov '10	323.75
Oct '10	323.51
Sep '10	323.26
Aug '10	323.1
Jul '10	323.02
Jun '10	323.01
May '10	323.01
Apr '10	322.97
Mar '10	322.94
Feb '10	322.93
Jan '10	322.91
Dec '09	322.84
Nov '09	322.71
Oct '09	322.51
Sep '09	322.3
Aug '09	322.15
Jul '09	322.02
Jun '09	321.95
May '09	321.97
Apr '09	322.1
Mar '09	322.27
Feb '09	322.34
Jan '09	322.21
Dec '08	321.98
Nov '08	321.8
Oct '08	321.65
Sep '08	321.49
Aug '08	321.4
Jul '08	321.42
Jun '08	321.45
May '08	321.43
Apr '08	321.39
Mar '08	321.38
Feb '08	321.39
Jan '08	321.33
Dec '07	321.15
Nov '07	320.95
Oct '07	320.73
Sep '07	320.46
Aug '07	320.22
Jul '07	320.18
Jun '07	320.24
May '07	320.22
Apr '07	320.18
Mar '07	320.28
Feb '07	320.38
Jan '07	320.36
Dec '06	320.27
Nov '06	320.16
Oct '06	320
Sep '06	319.82
Aug '06	319.68
Jul '06	319.63
Jun '06	319.66
May '06	319.68
Apr '06	319.7
Mar '06	319.77
Feb '06	319.81
Jan '06	319.73
Dec '05	319.58
Nov '05	319.36
Oct '05	319.11
Sep '05	318.9
Aug '05	318.77
Jul '05	318.65
Jun '05	318.59
May '05	318.66
Apr '05	318.78
Mar '05	318.86
Feb '05	318.89
Jan '05	318.87
Dec '04	318.77
Nov '04	318.56
Oct '04	318.34
Sep '04	318.23
Aug '04	318.17
Jul '04	318.14
Jun '04	318.13
May '04	318.14
Apr '04	318.14
Mar '04	318.16
Feb '04	318.2
Jan '04	318.18
Dec '03	318.11
Nov '03	318.04
Oct '03	317.93
Sep '03	317.77
Aug '03	317.64
Jul '03	317.57
Jun '03	317.53
May '03	317.51
Apr '03	317.47
Mar '03	317.4
Feb '03	317.34
Jan '03	317.3
Dec '02	317.24
Nov '02	317.13
Oct '02	316.99
Sep '02	316.87
Aug '02	316.82
Jul '02	316.82
Jun '02	316.83
May '02	316.85
Apr '02	316.9
Mar '02	316.96
Feb '02	316.97
Jan '02	316.93
Dec '01	316.87
Nov '01	316.76
Oct '01	316.59
Sep '01	316.41
Aug '01	316.3
Jul '01	316.23
Jun '01	316.16
May '01	316.11
Apr '01	316.12
Mar '01	316.21
Feb '01	316.31
Jan '01	316.3

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Release date

2025

More information

Region

Worldwide

Survey time period

January 2001 to May 2025

Supplementary notes

Atmospheric N₂O based on globally averaged marine surface data.
N₂O expressed as a mole fraction in dry air, nanomol/mol, abbreviated as ppb

Citation formats

Monthly mean atmospheric nitrous oxide (N₂O) concentrations reached a record high of 338.6 parts per million (ppm) in March 2025 and throughout April and May of the same year. This represents an increase of roughly seven percent when compared to average N₂O levels in January 2001. Globally-averaged annual atmospheric nitrous oxide concentrations reached a new record high in 2024. Nitrous oxide is a potent greenhouse gas with a global warming potential (GWP) 300 times greater than carbon dioxide.