Twelve years of global observation of formaldehyde in the troposphere using GOME and SCIAMACHY sensors
Author:
De Smedt I.,Müller J.-F.,Stavrakou T.,van der A R.,Eskes H.,Van Roozendael M.
Abstract
Abstract. This work presents global tropospheric formaldehyde columns retrieved from near-UV radiance measurements performed by the GOME instrument onboard ERS-2 since 1995, and by SCIAMACHY, in operation on ENVISAT since the end of 2002. A special effort has been made to ensure the coherence and quality of the CH2O dataset covering the period 1996–2007. Optimised DOAS settings are proposed in order to reduce the impact of two important sources of error in the derivation of slant columns, namely, the polarisation anomaly affecting the SCIAMACHY spectra around 350 nm, and a major absorption band of the O4 collision complex centred near 360 nm. The air mass factors are determined from scattering weights generated using radiative transfer calculation taking into account the cloud fraction, the cloud height and the ground albedo. Vertical profile shapes of CH2O are provided by the global CTM IMAGES based on an up-to-date representation of emissions, atmospheric transport and photochemistry. A comprehensive error analysis is presented. This includes errors on the slant columns retrieval and errors on the air mass factors which are mainly due to uncertainties in the a priori profile and in the cloud properties. The major features of the retrieved formaldehyde column distribution are discussed and compared with previous CH2O datasets over the major emission regions.
Publisher
Copernicus GmbH
Reference71 articles.
1. Abbot, D. S., Palmer, P. I., Martin, R. V., Chance, K. V., Jacob, D. J., and Guenther, A.: Seasonal and interannual variability of North American isoprene emissions as determined by formaldehyde column measurements from space, Geophys. Res. Lett., 30, 17, 1886, https://doi.org/10.1029/2003GL017336, 2003. 2. Andreae, M. O. and Merlet, P.: Emission of trace gases and aerosols from biomass burning, Global Biogeochem. Cyc., 15, 955–966, 2001. 3. Bey, I., Jacob, D. J., Yantosca, R. M., Logan, J. A., Field, B. D., Fiore, A. M., Li, Q., Liu, H. Y., Mickley, L. J., and Schultz, M. G.: Global modeling of tropospheric chemistry with assimilated meteorology: Model description and evaluation, J. Geophys. Res., 106, D19, 23 073–23 096, https://doi.org/029/2001JD000807, 2001. 4. Boersma, K. F., Eskes, H. J., and Brinksma., E. J.: Error analysis for tropospheric NO2 retrieval from space, J. Geophys. Res., 109, D04311, https://doi.org/10.1029/2003JD003962, 2004. 5. Bogumil, K., Orphal, J., Voigt, S., Bovensmann, H., Fleischmann, O. C., Hartmann, M., Homann, T., Spietz, P., and Burrows, J. P.: Reference spectra of atmospheric trace gases measured with the SCIAMACHY PFM satellite spectrometer, in ESAMS '99 – European Symposium on atmospheric Measurements from Space, 2, 443–447, 1999.
Cited by
5 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
|
|