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| Titel |
The impact of channel effect on Asian dust transport dynamics: a case in southeastern Asia |
| VerfasserIn |
C.-Y. Lin, Y.-F. Sheng, W.-N. Chen, Z. Wang, C.-H. Kuo, W.-C. Chen, T. Yang |
| 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 ; 12, no. 1 ; Nr. 12, no. 1 (2012-01-05), S.271-285 |
| Datensatznummer |
250010434
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| Publikation (Nr.) |
 copernicus.org/acp-12-271-2012.pdf |
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| Zusammenfassung |
| A super heavy dust event was identified with unprecedented PM10 in terms of
speed and concentration in the southeastern Asia. The average concentration
was observed exceeding the value of 1000 μg m−3 for the duration
lasting more than 10 h, with the highest value reached
1724 μg m−3 in northern Taiwan on 21 March 2010. We found that this case
exhibited an uneven and intriguing spatial distribution of PM10
concentration and transport speed between eastern and western Taiwan. Higher
values were observed in the western and northern areas. The peak
concentrations can vary up to 5-fold between western and eastern Taiwan, and
ten-fold between the northern tip and southern tip of Taiwan, only about
400 km apart. A high resolution, 10 km, numerical study by Weather Research
Forecast (WRF) and WRF-chem models revealed that this intriguing spatial
distribution of the Asian dust transport was resulting from a strong
coupling effect of the geographic channel effect and blocking of the
easterly from the Pacific Ocean. We are confident that this coupling effect
can be revealed only by applying a high resolution numerical study in other
similar regions. |
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