Spectroscopic measurements of atmospheric constituents and pollutants by in situ and remote techniques from the ground and in flight

Infrared spectroscopy is a powerful tool for precise measurements of atmosp heric trace,species concentrations through the use of characteristic spectr al signatures of the different molecular species and their associated vibra tion-rotation bands in the mid- or near-infrared. Different methods based o n quantitative spectroscopy permit tropospheric or stratospheric measuremen ts: in situ long path absorption, atmospheric absorption/emission by Fourie r transform spectroscopy with high spectral resolution instruments on the g round, airborne, balloon-borne or satellite-borne. (C) 2001 Academie des sc iences/Editions scientifiques et medicales Elsevier SAS.