FTIR Spectrometer

The Infrared Working Group (IRWG) manages twenty solar viewing Fourier-Transform Infrared Spectrometers (FTIR) that are distributed on all continents spanning the latitude range from 80ºS to 80ºN. These instruments record mid-infrared solar transmission spectra at high spectral resolution. Some, especially at remote sites operate autonomously, others are operated remotely or manually. The spectra contain the spectral signatures of vibrational-rotational transitions of numerous trace gases in the terrestrial atmosphere as they absorb solar radiation. The spectra are analysed to measure the concentration of these trace gases in the atmosphere using the method of optimal estimation. Gases of primary interest are  O3, HCl, HF, ClONO2, HNO3, N2O, CH4, CO, C2H6, and HCN.  Concentrations of these species all vary with altitude, this information along with retrieval characterization metadata are provided to allow optimal use of the data. Our aim is to record long-term high quality inter-calibrated spectra that provide trends of trace gases that can be used to understand tropospheric (https://en.wikipedia.org/wiki/Troposphere) and stratospheric chemistry (https://en.wikipedia.org/wiki/Stratosphere) and transport.

Locations

Model: Bruker 125HR
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Model: Bomen DA8
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Model: Bruker 120M

Model: Bruker 120
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Model: Bruker 120M
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Model: Bomem DA2/Bruker 120M/Bruker 125HR
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Model: Bruker
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Model: JPL MkIV
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Model: Bruker 120HR/125
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Model: Bruker 120HR/125
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Model: EOCOM
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Model: JPL MkIV
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Model: Bruker 120MComments: *.wof
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Model: Bruker 120M/125M
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Model: Bruker IFS 125HR
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Model: Bruker 120MComments: *.wof
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Model: Bruker 120HR/125HR
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Model: Bruker 120M/125M
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Model: Bruker 120HR
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Model: Bruker 120HRComments: ulg002
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Model: Home-built FTSComments: ulg001
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Model: Bruker 120MComments: *.wof
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Model: Bruker 120M/120HR/125HR
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Model: Bruker 120M

Model: Bruker 120HR
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Model: Bomem DA8
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Model: Bruker 120M
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Model: Bruker
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Model: JPL MkIV
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Model: Bruker 125/Bomem DA8, DA3
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Model: JPL MkIV
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Model: Bruker 120M

Model: McMath FTS
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Model: Bruker 120M/125HR
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Model: Bruker 125HRComments: iasb003
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Model: Bruker 120MComments: iasb001
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Model: Bruker 125HRComments: iasb002
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Model: Bomem DA3
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Model: Bruker 125HR
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Model: Bruker 120/5HR
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