A method of remote sensing of carbon greenhouse gases and water vapour isotopologues in the atmosphere using high resolution ground-based FTIR measurements
Abstract
Modern ground-based high resolution Fourier IR spectrometers used for remote sensing of the atmosphere make are able to distinctly resolve absorption lines of different isotopologues of the trace gases. This work presents a method and first results regarding the retrieval of H2(18)O/H2(16)O, CH3D/CH4, (13)CH4/(12)CH4 and (13)CO2/(12)CO2 mean concentration ratios in total atmospheric column using ground-based FTIR spectral measurements. Atmospheric transmittance spectra were modeled and analyzed in order to find spectral channels with clear features of carbon gases and water vapour isotopologues. Several microwindows containing H2(18)O, CH3D, (13)CH4 and (13)CO2 lines appropriate for the retrieval of concentration ratios were selected and identified in measured spectra. Atmospheric transmittance spectra measured with ground-based FTIR at the Ural Atmospheric Station in Kourovka and in the Institute of Environmental Physics of Bremen University during 2010-2011 have been processed in order to retrieve H2(18)O/H2(16)O (δ18O_H2O), CH3D/CH4 (δD_CH4), (13)CH4/(12)CH4 (δ13C_CH4) and (13)CO2/(12)CO2 (δ13C_CO2) in the atmosphere. The proposed method and obtained results are discussed.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2012
- Bibcode:
- 2012AGUFM.A53N0344R
- Keywords:
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- 3360 ATMOSPHERIC PROCESSES / Remote sensing;
- 3394 ATMOSPHERIC PROCESSES / Instruments and techniques