This webpage gives an overview of the METOP/IASI CH4 data product (De Wachter et al., 2017) developed at BIRA-IASB.
The IASI CH4 product is developed with the ASIMUT-ALVL algorithm. ASIMUT-ALVL is a radiative transfer and inversion software developed at BIRA-IASB, designed for simulating atmospheric radiances and inversions in planetary atmospheres (Vandaele et al., 2006). The ASIMUT-ALVL code has a specific interface dealing with the IASI instrument characteristics. The retrieval is based on the optimal estimation method (Rodgers, 2000).
Figure 1 : Monthly mean maps of the BIRA-IASB IASI tropospheric CH4 column between 4 and 17 km for the year 2014.
De Wachter, E., Kumps, N., Vandaele, A. C., Langerock, B., and De Mazière, M.: Retrieval and validation of MetOp/IASI methane, Atmos. Meas. Tech., 10, 4623-4638, https://doi.org/10.5194/amt-10-4623-2017, 2017.
Maes, Kwinten, Sophie Vandenbussche, Lars Klüser, Nicolas Kumps, and Martine de Mazière. 2016. “Vertical Profiling of Volcanic Ash from the 2011 Puyehue Cordón Caulle Eruption Using IASI.” Ed. Alexander A Kokhanovsky and Prasad S Thenkabail. Remote Sensing 8 (2).
Rodgers C.D.: Inverse methods for atmospheric sounding. Theory and practice, World scientific, Singapore, 90-98, 2000.
Vandaele, A.C., M. Kruglanski, and M. De Maziere, Modelling and retrieval of Atmospheric spectra using ASIMUT in Proc. of the First ‘Atmospheric Science Conference’, ESRIN, Frascati, Italy, 8 – 12 May 2006 (ESA SP-628, July 2006).
Vandenbussche, S., Kochenova, S., Vandaele, A. C. , Kumps, N. , De Mazière, M., Retrieval Of Desert Dust Aerosol Vertical Profiles From Iasi Measurements In The Tir Atmospheric Window,
Atmos. Meas. Tech. 6, 2577-2591, 2013.