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| Titel |
The optical and physical properties of atmospheric aerosols over the Indian Antarctic stations during southern hemispheric summer of the International Polar Year 2007–2008 |
| VerfasserIn |
Jai Prakash Chaubey, K. Krishna Moorthy, S. Suresh Babu, Vijayakumar S. Nair |
| 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 ; 29, no. 1 ; Nr. 29, no. 1 (2011-01-11), S.109-121 |
| Datensatznummer |
250016952
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| Publikation (Nr.) |
 copernicus.org/angeo-29-109-2011.pdf |
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| Zusammenfassung |
| The properties of background aerosols and their dependence on
meteorological, geographical and human influence are examined using measured
spectral aerosol optical depth (AOD), total mass concentration (MT) and
derived number size distribution (NSD) over two distinct coastal locations
of Antarctica; Maitri (70° S, 12° E, 123 m m.s.l.) and Larsemann Hills
(LH; 69° S, 77° E, 48 m m.s.l.) during southern hemispheric summer of
2007–2008 as a part of the 27th Indian Scientific Expedition to
Antarctica (ISEA) during International Polar Year (IPY). Our investigations
showed comparable values for the mean columnar AOD at 500 nm over Maitri (0.034±0.005)
and LH (0.032±0.006) indicating good spatial
homogeneity in the columnar aerosol properties over the coastal Antarctica.
Estimation of Angstrom exponent α showed accumulation mode dominance
at Maitri (α~1.2±0.3) and coarse mode dominance at LH
(0.7±0.2). On the other hand, mass concentration (MT) of ambient
aerosols showed relatively high values (≈8.25±2.87 μg m−3)
at Maitri in comparison to LH (6.03±1.33 μg m−3). |
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