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| Titel |
NASA LaRC airborne high spectral resolution lidar aerosol measurements during MILAGRO: observations and validation |
| VerfasserIn |
R. R. Rogers, J. W. Hair, C. A. Hostetler, R. A. Ferrare, M. D. Obland, A. L. Cook, D. B. Harper, S. P. Burton, Y. Shinozuka, C. S. McNaughton, A. D. Clarke, J. Redemann, P. B. Russell, J. M. Livingston, L. I. Kleinman |
| 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. 14 ; Nr. 9, no. 14 (2009-07-22), S.4811-4826 |
| Datensatznummer |
250007516
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| Publikation (Nr.) |
 copernicus.org/acp-9-4811-2009.pdf |
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| Zusammenfassung |
| The NASA Langley Research Center (LaRC) airborne High Spectral Resolution
Lidar (HSRL) measures vertical profiles of aerosol extinction, backscatter,
and depolarization at both 532 nm and 1064 nm. In March of 2006 the HSRL
participated in the Megacity Initiative: Local and Global Research
Observations (MILAGRO) campaign along with several other suites of
instruments deployed on both aircraft and ground based platforms. This paper
presents high spatial and vertical resolution HSRL measurements of aerosol
extinction and optical depth from MILAGRO and comparisons of those
measurements with similar measurements from other sensors and model
predictions. HSRL measurements coincident with airborne in situ aerosol
scattering and absorption measurements from two different instrument suites
on the C-130 and G-1 aircraft, airborne aerosol optical depth (AOD)
and extinction measurements from an airborne tracking sunphotometer on the
J-31 aircraft, and AOD from a network of ground based Aerosol Robotic
Network (AERONET) sun photometers are presented as a validation of the HSRL
aerosol extinction and optical depth products. Regarding the extinction
validation, we find bias differences between HSRL and these instruments to
be less than 3% (0.01 km−1) at 532 nm, the wavelength at which the
HSRL technique is employed. The rms differences at 532 nm were less than
50% (0.015 km−1). To our knowledge this is the most comprehensive
validation of the HSRL measurement of aerosol extinction and optical depth
to date. The observed bias differences in ambient aerosol extinction between
HSRL and other measurements is within 15–20% at visible wavelengths,
found by previous studies to be the differences observed with current
state-of-the-art instrumentation (Schmid et al., 2006). |
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