An airborne amplitude-modulated 1.57 μm differential laser absorption spectrometer: simultaneous measurement of partial column-averaged dry air mixing ratio of CO<sub>2</sub> and target range
-
Published:2013-02-19
Issue:2
Volume:6
Page:387-396
-
ISSN:1867-8548
-
Container-title:Atmospheric Measurement Techniques
-
language:en
-
Short-container-title:Atmos. Meas. Tech.
Author:
Sakaizawa D., Kawakami S., Nakajima M., Tanaka T., Morino I.ORCID, Uchino O.
Abstract
Abstract. Simultaneous measurements of the partial column-averaged dry air mixing ratio of CO2 (XCO2) and target range were demonstrated using airborne amplitude-modulated 1.57 μm differential laser absorption spectrometer (LAS). The LAS system is useful for discriminating between ground and cloud return signals and has a demonstrated ability to suppress the impact of integrated aerosol signals on atmospheric CO2 measurements. A high correlation coefficient (R) of 0.987 between XCO2 observed by LAS and XCO2 calculated from in situ measurements was obtained. The averaged difference in XCO2 obtained from LAS and validation data was within 1.5 ppm for all spiral measurements. An interesting vertical profile was observed for both XCO2LAS and XCO2val, in which lower altitude CO2 decreases compared to higher altitude CO2 attributed to the photosynthesis over grassland in the summer. In the case of an urban area where there are boundary-layer enhanced CO2 and aerosol in the winter, the difference of XCO2LAS to XCO2val is a negative bias of 1.5 ppm, and XCO2LAS is in agreement with XCO2val within the measurement precision of 2.4 ppm (1 SD).
Publisher
Copernicus GmbH
Subject
Atmospheric Science
Reference32 articles.
1. Abshire, J. B., Riris, H., Allan, G. R., Weaver, C. J., Mao, J., Sun, X., Hasselbrack, W. E., Kawa, S. R., and Biraud, S.: Pulsed airborne lidar measurement of atmospheric CO2 column absorption, Tellus B, 52, 770–783, https://doi.org/10.1111/j.1600-0889.2010.00502.x, 2010. 2. Amediek, A., Fix, A., Wirth, M., and Ehret, G.: Development of an OPO system at 1.57 μm for integrated path DIAL measurement of atmospheric carbon dioxide, Appl. Phys. B, 92, 295–302, https://doi.org/10.1007/s00340-008-3075-6, 2008. 3. Baker, D. F., Kawa, S. R., Rayner, P. J., Browell, E. V., Menzies, R. T., and Abshire, J. B.: CO2 Flux Inversion Error Analyses for Future Active Space CO2 Missions like ASCENDS, AGU General Assembly, 5–9 December 2011, AGU2011-AC34C-02, San Francisco, USA, 2011. 4. Browell, E. V., Dobler, J., Kooi, S. A., Choi, Y., Harrison, F. W., Moore, B., and Zaccheo, T. S.: Airborne Validation of Laser Remote Measurements of Atmospheric Carbon Dioxide, AGU General Assembly, 5–9 December 2011, AGU2011-A34C-04, San Francisco, USA, 2011. 5. Devi, V. M., Benner, D. C., Brown, L. R., Miller, C. E., and Toth, R. A.: Line mixing and speed dependence in CO2 at 6227.9 cm−1: constrained multispectrum analysis of intensities and line shapes in the 30013 ← 00001 band, J. Mol. Spectrosc., 245, 52–80, https://doi.org/10.1016/j.jms.2007.05.015, 2007.
Cited by
16 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|