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| Titel |
Large Asian dust layers continuously reached North America in April 2010 |
| VerfasserIn |
I. Uno, K. Eguchi, K. Yumimoto, Z. Liu, Y. Hara, N. Sugimoto, A. Shimizu, T. Takemura |
| 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. 14 ; Nr. 11, no. 14 (2011-07-25), S.7333-7341 |
| Datensatznummer |
250009949
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| Publikation (Nr.) |
 copernicus.org/acp-11-7333-2011.pdf |
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| Zusammenfassung |
| The NASA space-borne Mie-lidar system CALIPSO/CALIOP revealed that multiple
large Asian dust layers with a horizontal scale of 2000–3000 km reached
North America, occupying the full troposphere, in April 2010. This kind of
dust layer transport has not been reported before. Our analysis of CALIOP
data and global aerosol model results revealed that frequent dust emissions
occurred in northwestern China because of stronger-than-average near-surface
winds, and that strong stable westerly winds carried the Asian dust from
northwestern China to the central Pacific Ocean. A negative pressure anomaly
was located in the eastern Pacific Ocean, and the main dust transport path
was split into two branches: a northern path and a southern path over North
America. Northern-path dust was trapped and stagnant for a longer time than
southern path dust and finally subsided under a high-pressure system. Dust
along the southern path reached the central US. These complex conditions
resulted in a multi-layered structure of dust over North America. |
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