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| Titel |
Retrieval of aerosol properties for fine/coarse mode aerosol mixtures from PARASOL observations |
| VerfasserIn |
S. Wang, X. Gu, T. Yu, J. Gao |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250059066
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| Zusammenfassung |
| The retrieval of aerosol properties for fine/coarse mode mixtures over urban areas is the most
challenge objective in satellite remote sensing of aerosols. In this study a new aerosol
retrieval algorithm using PARASOL observations is proposed. The spectral multi-angle
unpolarized (total) radiances are used for the preliminary choice of possible AODs and
aerosol models based on the spectral reflectance shape invariance assumption. Then the fine
mode AOD derived from polarized measurements is used to finally constrain the previous
results, yielding the total AOD and fine mode volume weighting (FMVW). Case studies are
conducted in Beijing and evaluated using the coincident AERONET measurements. The
results show a significant correlation of 0.92 and a high Gfrac (fraction of accurate retrievals)
of 82%. Analysis on the retrieval accuracy illustrates that the algorithm capability
depends significantly on the data quality index, as the AOD retrieval accuracy is
obvious lower for the data with QI < 0.75. The other error source for the aerosol
retrieval comes from the discrepancy in the pre-assumed and the true aerosol models. |
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