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| Titel |
Dual-wavelength aerosol vertical profile measurements by MAX-DOAS at Tsukuba, Japan |
| VerfasserIn |
H. Irie, Y. Kanaya, H. Akimoto, H. Iwabuchi, A. Shimizu, K. Aoki |
| 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 ; 9, no. 8 ; Nr. 9, no. 8 (2009-04-24), S.2741-2749 |
| Datensatznummer |
250007210
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| Publikation (Nr.) |
 copernicus.org/acp-9-2741-2009.pdf |
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| Zusammenfassung |
| We present vertical profiles of the aerosol extinction coefficient retrieved
from ground-based Multi-Axis Differential Optical Absorption Spectroscopy
(MAX-DOAS) measurements at Tsukuba, Japan (36.1° N, 140.1° E),
from November 2006 to March 2007. Retrievals utilizing absorption by the oxygen
collision complex O4 are first made at two wavelengths, 354 and 476 nm.
A robust assessment of the MAX-DOAS aerosol data is then made using
coincident lidar measurements throughout the period. Agreement between
aerosol extinction coefficients measured by MAX-DOAS and the lidar tends to
be better at the longer wavelength and at lower altitudes. At 476 nm, the
best agreement, to within 30%, is found at altitudes of 0–1 km,
confirming results from a literature assessment for a two-month measurement
period. These findings are supported by comparisons between aerosol optical
depths derived from MAX-DOAS and sky radiometer measurements and are further
explained by differences in the altitude-dependent measurement sensitivity
to the aerosol extinction coefficient between 354 and 476 nm. Thus,
uncertainty in MAX-DOAS aerosol measurements is well quantified and
characterized, providing a basis for quantitative studies using MAX-DOAS
measurements. |
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