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| Titel |
Simultaneous retrieval of aerosol and surface optical properties from combined airborne- and ground-based direct and diffuse radiometric measurements |
| VerfasserIn |
C. K. Gatebe, O. Dubovik, M. D. King, A. Sinyuk |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 10, no. 6 ; Nr. 10, no. 6 (2010-03-25), S.2777-2794 |
| Datensatznummer |
250008256
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| Publikation (Nr.) |
 copernicus.org/acp-10-2777-2010.pdf |
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| Zusammenfassung |
| This paper presents a new method for simultaneously
retrieving aerosol and surface reflectance properties from combined airborne
and ground-based direct and diffuse radiometric measurements. The method is
based on the standard Aerosol Robotic Network (AERONET) method for
retrieving aerosol size distribution, complex index of refraction, and
single scattering albedo, but modified to retrieve aerosol properties in two
layers, below and above the aircraft, and parameters on surface optical
properties from combined datasets (Cloud Absorption Radiometer (CAR) and
AERONET data). A key advantage of this method is the inversion of all
available spectral and angular data at the same time, while accounting for
the influence of noise in the inversion procedure using statistical
optimization. The wide spectral (0.34–2.30 μm) and angular range
(180°) of the CAR instrument, combined with observations from an AERONET
sunphotometer, provide sufficient measurement constraints for characterizing
aerosol and surface properties with minimal assumptions. The robustness of
the method was tested on observations made during four different field
campaigns: (a) the Southern African Regional Science Initiative 2000 over
Mongu, Zambia, (b) the Intercontinental Transport Experiment-Phase B over
Mexico City, Mexico (c) Cloud and Land Surface Interaction Campaign over the
Atmospheric Radiation Measurement (ARM) Central Facility, Oklahoma, USA, and
(d) the Arctic Research of the Composition of the Troposphere from Aircraft
and Satellites (ARCTAS) over Elson Lagoon in Barrow, Alaska, USA. The four
areas are dominated by different surface characteristics and aerosol types,
and therefore provide good test cases for the new inversion method. |
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