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Global Monitoring Laboratory
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    More About ODS What are CFCs? What are HCFCs? What are HFCs? What are Halons?

Gases

N2O SF6 CFC-11 CFC-12 CFC-113 CCl4 CH3CCl3 C2Cl4 CH2Cl2 HCFC-22 HCFC-141b HCFC-142b HFC-32 HFC-125 HFC-134a HFC-143a HFC-152a HFC-227ea HFC-365mfc HFC-236fa halon-1211 halon-1301 halon-2402 CH3Br CH3Cl OCS PFC-116 CF4 NF3 SO2F2 C2H6 (Ethane) C3H8 (Propane)

Long-term global trends of atmospheric trace gases

The observational results appearing below are monthly means from a subset of the remote background sites where NOAA/GML make measurements.  These data are regularly updated on the web and can be obtained by clicking on the appropriate figure.

In-situ data is also available at a subset of stations.


N2O
N2O
CFC-12
CFC-12
CFC-11
CFC-11
CFC-113
CFC-113
SF6
SF6
OCS
OCS
CH3CCl3
CH3CCl3
CCl4
CCl4
C2Cl4
C2Cl4
CH3Cl
CH3Cl
CH3Br
CH3Br
CH2Cl2
CH2Cl2
halon-1211
h1211
halon-1301
h1301
halon-2402
h2402
HCFC-22
HCFC-22
HCFC-141b
HCFC-141b
HCFC-142b
HCFC-142b
HFC-134a
HFC-134a
HFC-152a
HFC-152a
HFC-32
HFC-32
HFC-125
HFC-125
HFC-143a
HFC-143a
HFC-227ea
HFC-227ea
HFC-365mfc
HFC-365mfc
HFC-236fa
HFC-236fa
PFC-116
PFC-116
CF4
CF4
NF3
NF3
SO2F2
SO2F2
C2H6
C2H6
C3H8
C3H8
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Global Monitoring Laboratory
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