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| Titel |
Multiple wavelengths retrieval of aerosol profiles from MAX-DOAS observations |
| VerfasserIn |
Shanshan Wang, Ka Lok Chan, Bin Zhou |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250140577
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| Publikation (Nr.) |
 EGU/EGU2017-3983.pdf |
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| Zusammenfassung |
| Since the MAX-DOAS method was applied to obtain the aerosol extinction profile, several
different retrieval algorithms has been proposed in last few years, in which most of them are
based on the Optimal-Estimation-Method (OEM). In this work, O4 absorptions of one clear
day during the second Cabauw Intercomparison campaign for Nitrogen Dioxide measuring
Instruments (CINDI-2) at Cabauw, Netherland was used to investigate the differences
between aerosol retrieval with single O4 absorption band and the combination of
multiple O4 bands. Firstly, aerosol retrieval based on the O4 absorption bands at 360
and 477 nm was carried out by HEIPRO (HEIdelberg PROfile) algorithm and 3M
(Munich Multiple wavelength MAX-DOAS inversion algorithm), respectively. These
two algorithms show high consistence in aerosol retrieval at single wavelength
band. Both of them can provide useful aerosol information, which can be further
validated by ancillary measurements, e.g. sun photometer, nephelometer and LIDAR.
However, the aerosol extinction profiles retrieved from different O4 absorption
bands show different vertical profile shapes. Therefore, we propose to combine
multiple O4 absorption bands to retrieve the aerosol profile. The retrieved results are
consistent with the single wavelength retrieval. The proposed inversion algorithm
can potentially retrieve the aerosol optical properties, e.g., Ångström exponent. |
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