Spatial distributions of soluble salts in surface snow of East Antarctica
To better understand how sea salt reacts in surface snow of Antarctica, we collected and identified non-volatile particles in surface snow along a traverse in East Antarctica. Samples were obtained during summer 2012/2013 from coastal to inland regions within 69°S to 80°S and 39°E to 45°E, a total d...
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Veröffentlicht in: | Tellus. Series B, Chemical and physical meteorology Chemical and physical meteorology, 2016-01, Vol.68 (1), p.29285-12 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | To better understand how sea salt reacts in surface snow of Antarctica, we collected and identified non-volatile particles in surface snow along a traverse in East Antarctica. Samples were obtained during summer 2012/2013 from coastal to inland regions within 69°S to 80°S and 39°E to 45°E, a total distance exceeding 800 km. The spatial resolution of samples is about one sample per latitude between 1500 and 3800 m altitude. Here, we obtain the atomic ratios of Na, S and Cl, and calculate the masses of sodium sulphate and sodium chloride. The results show that, even in the coast snow sample (69°S), sea salt is highly modified by acid (HNO
3
or H
2
SO
4
). The fraction of sea salt that reacts with acid increases in the region from 70°S to 74°S below 3000 m a.s.l., where some NaCl remains. At the higher altitudes (above 3300 m a.s.l.) in the inland region (74°S to 80°S), the reaction uses almost all of the available NaCl. |
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ISSN: | 0280-6509 1600-0889 |
DOI: | 10.3402/tellusb.v68.29285 |