Use this web page to find specific data files available from the public ftp file archive of the ESRL Global Monitoring Division. Alternatively, you can browse the GMD ftp server. Click on the icons ( or ) under the 'Data' table heading in the dataset description boxes to either download the data file desired, or take you to the appropriate directory on the ftp server, where you can make selections based on date.

Category Greenhouse Gases (14) Non-Methane Hydrocarbons (6)

Parameter name C13/C12 in Carbon Dioxide (2) C13/C12 in Methane (2) Carbon Dioxide (2) Carbon Monoxide (2) Methane (2) Molecular Hydrogen (2) O18/O16 in Carbon Dioxide (2) ethane (1) i-butane (1) i-pentane (1) n-butane (1) n-pentane (1) propane (1)

Type Flask (20)

Frequency Discrete (13) Monthly Averages (7)

Site CBA (20)

Information about site codes can be found here.

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	Site	Category	Name	Type	Frequency	Year	Data
1	Cold Bay, Alaska, United States (CBA) Air samples collected in glass flasks.	Non-Methane Hydrocarbons	ethane (C2H6)	Flask	Discrete	Multiple
2	Cold Bay, Alaska, United States (CBA) Air samples collected in glass flasks.	Non-Methane Hydrocarbons	propane (C3H8)	Flask	Discrete	Multiple
3	Cold Bay, Alaska, United States (CBA) Air samples collected in glass flasks.	Greenhouse Gases	Methane (CH4)	Flask	Discrete	Multiple
4	Cold Bay, Alaska, United States (CBA) Air samples collected in glass flasks.	Greenhouse Gases	C13/C12 in Methane (d13C (CH4))	Flask	Discrete	Multiple
5	Cold Bay, Alaska, United States (CBA) Air samples collected in glass flasks.	Greenhouse Gases	Carbon Monoxide (CO)	Flask	Discrete	Multiple
6	Cold Bay, Alaska, United States (CBA) Air samples collected in glass flasks.	Greenhouse Gases	Carbon Dioxide (CO2)	Flask	Discrete	Multiple
7	Cold Bay, Alaska, United States (CBA) Air samples collected in glass flasks.	Greenhouse Gases	C13/C12 in Carbon Dioxide (d13C (CO2))	Flask	Discrete	Multiple
8	Cold Bay, Alaska, United States (CBA) Air samples collected in glass flasks.	Greenhouse Gases	O18/O16 in Carbon Dioxide (d18O (CO2))	Flask	Discrete	Multiple
9	Cold Bay, Alaska, United States (CBA) Air samples collected in glass flasks.	Greenhouse Gases	Molecular Hydrogen (H2)	Flask	Discrete	Multiple
10	Cold Bay, Alaska, United States (CBA) Air samples collected in glass flasks.	Non-Methane Hydrocarbons	i-butane (i-C4H10)	Flask	Discrete	Multiple
11	Cold Bay, Alaska, United States (CBA) Air samples collected in glass flasks.	Non-Methane Hydrocarbons	i-pentane (i-C5H12)	Flask	Discrete	Multiple
12	Cold Bay, Alaska, United States (CBA) Air samples collected in glass flasks.	Non-Methane Hydrocarbons	n-butane (n-C4H10)	Flask	Discrete	Multiple
13	Cold Bay, Alaska, United States (CBA) Air samples collected in glass flasks.	Non-Methane Hydrocarbons	n-pentane (n-C5H12)	Flask	Discrete	Multiple
14	Cold Bay, Alaska, United States (CBA) Air samples collected in glass flasks.	Greenhouse Gases	Methane (CH4)	Flask	Monthly Averages	Multiple
15	Cold Bay, Alaska, United States (CBA) Air samples collected in glass flasks.	Greenhouse Gases	C13/C12 in Methane (d13C (CH4))	Flask	Monthly Averages	Multiple
16	Cold Bay, Alaska, United States (CBA) Air samples collected in glass flasks.	Greenhouse Gases	Carbon Monoxide (CO)	Flask	Monthly Averages	Multiple
17	Cold Bay, Alaska, United States (CBA) Air samples collected in glass flasks.	Greenhouse Gases	Carbon Dioxide (CO2)	Flask	Monthly Averages	Multiple
18	Cold Bay, Alaska, United States (CBA) Air samples collected in glass flasks.	Greenhouse Gases	C13/C12 in Carbon Dioxide (d13C (CO2))	Flask	Monthly Averages	Multiple
19	Cold Bay, Alaska, United States (CBA) Air samples collected in glass flasks.	Greenhouse Gases	O18/O16 in Carbon Dioxide (d18O (CO2))	Flask	Monthly Averages	Multiple
20	Cold Bay, Alaska, United States (CBA) Air samples collected in glass flasks.	Greenhouse Gases	Molecular Hydrogen (H2)	Flask	Monthly Averages	Multiple