Summary form only given. Methane is an important greenhouse gas because it is a source gas that affects the lifetime of many other trace gases, its oxidation by OH produces peroxy radicals that are important for O/sub 3/ production, and its oxidation is important for the production, destruction, and recycling of HO/sub x/ radicals. The authors demonstrate a differential absorption lidar (DIAL) technique that measures the backscattered pulse energies at two wavelengths, /spl lambda//sub on/ and /spl lambda//sub off/. A comparison is made between the scattered signal monitored when the wavelength (/spl lambda//sub on/) of the laser is tuned to the peak of an absorption line of the molecule being investigated and when it (/spl lambda//sub off/) is detuned to lie in the wing of the line.


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    Titel :

    A mid-IR OPO based lidar system for DIAL measurements of tropospheric methane concentration


    Beteiligte:
    Lee, S.W. (Autor:in) / McNeil, J. (Autor:in) / Zenker, T. (Autor:in) / Chyba, T.H. (Autor:in)


    Erscheinungsdatum :

    1999-01-01


    Format / Umfang :

    161058 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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