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DLR IASI Dust Retrieval Mineral dust optical depth at 10µm is retrieved over land and ocean from singular vector decomposition based dust information together with dust component extinction spectra from laboratory measurements. With the information of dust component contribution to observed extinction spectra dust optical depth is transferred to 0.5µm. As thermal infrared spectral variability information is used in the retrieval, it is sensitive to dust particles only. The singular vector decomposition based approach allows for dust AOD retrieval also over desert surfaces with highly variable surface emissivity. As only observations of the 8-12µm range are used, the retrieval is independent of solar illumination, thus yielding dust observations twice daily. A pixel-wise retrieval error, which can be used as quality flag, is calculated and brought about with the dust observations. Effective radius estimates are experimental and not validated
The above information was last updated on 19.Juni 2012 Contact: Thomas Holzer-Popp | |||||||||||||||||||||||||||||||||||||||||||||||||||