We discuss the spectroscopic requirements for a laser absorption spectrometer (LAS) approach to high-precision carbon dioxide (CO<sub>2</sub>) measurements in the troposphere. Global-scale, high-precision CO<sub>2</sub> measurements are highly desirable in an effort to improve understanding and quantification of the CO<sub>2</sub> sources and sinks and their impact on global climate. We present differential absorption sounding characteristics for selected LAS transmitter laser wavelengths, emphasizing the effects of atmospheric temperature profile uncertainties. Candidate wavelengths for lower-troposphere measurements are identified in the CO<sub>2</sub> bands centered near 1.57, 1.60, and 2.06 μm.
© 2003 Optical Society of America
(010.0010) Atmospheric and oceanic optics : Atmospheric and oceanic optics
(010.1280) Atmospheric and oceanic optics : Atmospheric composition
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(280.3420) Remote sensing and sensors : Laser sensors
(300.6340) Spectroscopy : Spectroscopy, infrared
Robert T. Menzies and David M. Tratt, "Differential Laser Absorption Spectrometry for Global Profiling of Tropospheric Carbon Dioxide: Selection of Optimum Sounding Frequencies for High-Precision Measurements," Appl. Opt. 42, 6569-6577 (2003)