| Title | Provenance of mineral dust deposited on Antarctica over the last sixty years by strontium isotopic analysis of snow from Dome C |
|---|---|
| Publication Type | Articolo su Rivista peer-reviewed |
| Year of Publication | 2024 |
| Authors | Vecchio, Maria Alessia, Costas-Rodríguez Marta, Caiazzo Laura, Bruschi Federica, Hobin Kasper, Vanhaecke Frank, and Grotti Marco |
| Journal | Atmospheric Environment |
| Volume | 338 |
| Pagination | 120850 |
| Date Published | Jan-12-2024 |
| Keywords | Antarctic plateau, antarctica, Isotope ratio, isotopic analysis, Jurassic, Mine dust, mineral dust, Miocene, Small variations, Snow samples, Strontium isotopes, Surface snow, Temporal trends |
| Abstract | The strontium (Sr) concentration and 87Sr/86Sr isotope ratio have been determined in 132 snow pit samples collected at Dome C, on the East Antarctic Plateau, corresponding to the period 1958–2019, and in 12 surface snow samples collected at the same site in 2016–2017. The average Sr concentration was 8.1 ± 5.7 pg g−1 (mean ± SD) in snow pit samples and 10.1 ± 8.0 pg g−1 (mean ± SD) in surface snow, without any significant temporal trend. The 87Sr/86Sr isotope ratio showed small variations (<0.15%), with an average 87Sr/86Sr value of 0.7094 ± 0.0010 (mean ± SD) in snow pit and 0.7103 ± 0.0004 (mean ± SD) in surface snow samples. These results seem to suggest that no change in the source(s) of mineral dust has occurred throughout the period investigated. Comparison of the 87Sr/86Sr isotope ratio of the snow samples with those of potential source areas suggests that the mineral dust reaching the East Antarctic plateau over the last decades is of a mixed origin, with a contribution from Patagonia and one or more other source(s) having a more radiogenic Sr isotopic signature, with a major fraction coming from South Australia. © 2024 The Authors |
| Notes | cited By 0 |
| URL | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85205365462&doi=10.1016%2fj.atmosenv.2024.120850&partnerID=40&md5=1c25f300f00ae935b99e9ba793c4505e |
| DOI | 10.1016/j.atmosenv.2024.120850 |
| Short Title | Atmospheric Environment |
| Citation Key | 12724 |
