Iterative maximum a posteriori (IMAP)-DOAS for retrieval of strongly absorbing trace gases: Model studies for CH 4 and CO 2 retrieval from near infrared spectra of SCIAMACHY onboard ENVISAT

By Christian Frankenberg, Ulrich Platt, T. Wagner. 2004

186 citations recorded by the source corpus.

In the past, differential optical absorption spectroscopy (DOAS) has mostly been employed for atmospheric trace gas retrieval in the UV/Vis spectral region. New spectrometers such as SCIAMACHY onboard ENVISAT also provide near infrared channels and thus allow for the detection of greenhouse gases like CH_4, CO_2, or N_2O. However, modifications of the classical DOAS algorithm are necessary to account for the idiosyncrasies of this spectral region, i.e. the temperature and pressure dependence of the high resolution absorption lines. Furthermore, understanding the sensitivity of the measurement of these high resolution, strong absorption lines by means of a non-ideal device, i.e. having finite spectral resolution, is of special importance. This applies not only in the NIR, but can also prove to be an issue for the UV/Vis spectral region.

Subfields: Atmospheric Science, Global and Planetary Change, Spectroscopy

View Paper: https://www.semanticscholar.org/paper/d2f1ec66e07cb2c03cfa6b588839211f9e415b24

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Citations in the corpus

Space‐based near‐infrared CO2 measurements: Testing the Orbiting Carbon Observatory retrieval algorithm and validation concept using SCIAMACHY observations over Park Falls, Wisconsin (2006, background): “The feasibility and characterization of space-based CO2 measurements for existing and future missions has been extensively discussed in several publications [ Frankenberg et al., 2005; Mao and Kawa, 2004; Che´din et al., 2003a; Dufouret al., 2004; Kuang et al., 2002; O’Brien and Rayner, 2002; Buchw”
Disentangling chlorophyll fluorescence from atmospheric scattering effects in O2 A‐band spectra of reflected sun‐light (2011, methodology): “This can be done efficiently with, e.g., the IMAP‐DOAS approach [Frankenberg et al., 2005].”
The Orbiting Carbon Observatory (OCO-2): spectrometer performance evaluation using pre-launch direct sun measurements (2014, methodology): “There is a strong similarity between footprints but, in general, most features are below 0.5 %, similar to measurements from the GOSAT satellite as well as TCCON.”