Spectroscopic measurements of a CO2 absorption line in an open vertical path using an airborne lidar
- 18 November 2013
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 103 (21), 214102
- https://doi.org/10.1063/1.4832616
Abstract
We used an airborne pulsed integrated path differential absorption lidar to make spectroscopic measurements of the pressure-induced line broadening and line center shift of atmospheric carbon dioxide at the 1572.335 nm absorption line. We scanned the lidar wavelength over 13 GHz (110 pm) and measured the absorption lineshape at 30 discrete wavelengths in the vertical column between the aircraft and ground. A comparison of our measured absorption lineshape to calculations based on HIgh-resolution TRANsmission molecular absorption database shows excellent agreement with the peak optical depth accurate to within 0.3%. Additionally, we measure changes in the line center position to within 5.2 MHz of calculations and the absorption linewidth to within 0.6% of calculations. These measurements highlight the high precision of our technique, which can be applied to suitable absorption lines of any atmospheric gas.Keywords
This publication has 25 references indexed in Scilit:
- An airborne amplitude-modulated 1.57 μm differential laser absorption spectrometer: simultaneous measurement of partial column-averaged dry air mixing ratio of CO2 and target rangeAtmospheric Chemistry and Physics, 2013
- Preliminary validation of column-averaged volume mixing ratios of carbon dioxide and methane retrieved from GOSAT short-wavelength infrared spectraAtmospheric Chemistry and Physics, 2011
- An improved tropospheric NO2 column retrieval algorithm for the Ozone Monitoring InstrumentPublished by Copernicus GmbH ,2011
- Pulsed airborne lidar measurements of atmospheric CO2 column absorptionTellus B: Chemical and Physical Meteorology, 2010
- Influence of line mixing on the retrievals of atmospheric CO2 from spectra in the 1.6 and 2.1 μm regionsAtmospheric Chemistry and Physics, 2009
- The HITRAN 2008 molecular spectroscopic databaseJournal of Quantitative Spectroscopy and Radiative Transfer, 2009
- Measurement of Pressure-Induced Broadening and Shift Coefficients of Carbon Dioxide Absorption Lines around 1.6 µm for using Differential Absorption LidarJapanese Journal of Applied Physics, 2008
- Evidence of systematic errors in SCIAMACHY-observed CO2 due to aerosolsAtmospheric Chemistry and Physics, 2005
- Optical heterodyne measurement of pulsed lasers: Toward high-precision pulsed spectroscopyPhysical Review A, 1992
- Pressure Shift and Broadening of Spectral LinesPhysical Review B, 1932