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| Titel |
Signatures of Rossby wave modulations in aerosol optical depth over the central Himalayan region |
| VerfasserIn |
D. V. Phanikumar, K. Niranjan Kumar, K. K. Shukla, H. Joshi, M. Venkat Ratnam, M. Naja, K. Reddy |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 32, no. 2 ; Nr. 32, no. 2 (2014-02-21), S.175-180 |
| Datensatznummer |
250121030
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| Publikation (Nr.) |
 copernicus.org/angeo-32-175-2014.pdf |
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| Zusammenfassung |
| Long-period modulations are shown in aerosol optical depth measured by the
Microtops II Sun photometer over a high-altitude site the central Himalayan
region (Nainital, 29.4° N, 79.5° E, 1958 m a.m.s.l.)
for the first time. Fourier analysis of aerosol optical depth showed dominant
25–45 day oscillations observed in MODerate-resolution Imaging Spectro
radiometer data. Further, a Hovmiller diagram showed westward (northward)
propagation at a different longitude (latitude), confirming that the
modulations are associated with Rossby waves. It is also shown that the
Rossby wave amplitude causes an additional warming of 4.16 ±
0.98 W m−2 over the observational site. Hence, the present study
illustrates the importance of wave-induced aerosol dynamics and the
corresponding radiative effects. |
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