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| Titel |
Horizontal variability of aerosol optical depth observed during the ARCTAS airborne experiment |
| VerfasserIn |
Y. Shinozuka, J. Redemann |
| 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 ; 11, no. 16 ; Nr. 11, no. 16 (2011-08-19), S.8489-8495 |
| Datensatznummer |
250010017
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| Publikation (Nr.) |
 copernicus.org/acp-11-8489-2011.pdf |
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| Zusammenfassung |
| We present statistics on the horizontal variability of aerosol optical depth
(AOD) directly measured from the NASA P-3 aircraft. Our measurements during
two contrasting phases (in Alaska and Canada) of the ARCTAS mission arguably
constrain the variability in most aerosol environments common over the
globe. In the Canada phase, which features local emissions, 499 nm AOD has a
median relative standard deviation (stdrel, med) of 19 % and 9 % and
an autocorrelation (r) of 0.37 and 0.71 over 20 km and 6 km horizontal
segments, respectively. In the Alaska phase, which features long-range
transport, the variability is considerably lower (stdrel, med = 3 %, r = 0.92 even over 35.2 km). Compared to the magnitude of AOD, its wavelength
dependence varies less in the Canada phase, more in the Alaska phase. We
translate these findings from straight-line flight tracks into grid boxes
and points, to help interpretation and design of satellite remote sensing,
suborbital observations and transport modeling. |
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