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| Titel |
Science verification of operational aerosol and cloud products for TROPOMI on Sentinel-5 precursor |
| VerfasserIn |
Luca Lelli, Sebastian Gimeno-Garcia, Abram Sanders, Maarten Sneep, Vladimir V. Rozanov, Alexander A. Kokhanovsky, Diego Loyola, John P. Burrows |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250134655
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| Publikation (Nr.) |
 EGU/EGU2016-15399.pdf |
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| Zusammenfassung |
| With the approaching launch of the Sentinel-5 precursor (S-5P) satellite, scheduled by mid
2016, one preparatory task of the L2 working group (composed by the Institute of
Environmental Physics IUP Bremen, the Royal Netherlands Meteorological Institute KNMI
De Bilt, and the German Aerospace Center DLR Oberpfaffenhofen) has been the assessment
of biases among aerosol and cloud products, that are going to be inferred by the respective
algorithms from measurements of the platform’s payload TROPOspheric Monitoring
Instrument (TROPOMI).
The instrument will measure terrestrial radiance with varying moderate spectral resolutions
from the ultraviolet throughout the shortwave infrared. Specifically, all the operational and
verification algorithms involved in this comparison exploit the sensitivity of molecular
oxygen absorption (the A-band, 755–775 nm, with a resolution of 0.54 nm) to changes in
optical and geometrical parameters of tropospheric scattering layers. Therefore,
aerosol layer height (ALH) and thickness (AOT), cloud top height (CTH), thickness
(COT) and albedo (CA) are the targeted properties. First, the verification of these
properties has been accomplished upon synchronisation of the respective forward
radiative transfer models for a variety of atmospheric scenarios. Then, biases against
independent techniques have been evaluated with real measurements of selected
GOME-2 orbits. Global seasonal bias assessment has been carried out for CTH, CA and
COT, whereas the verification of ALH and AOT is based on the analysis of the ash
plume emitted by the icelandic volcanic eruption Eyjafjallajökull in May 2010 and
selected dust scenes off the Saharan west coast sensed by SCIAMACHY in year 2009. |
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