Prominent features in isotopic, chemical and dust stratigraphies from coastal East Antarctic ice sheet (Eastern Wilkes Land)
| Autor: | Claudio Scarchilli, Virginia Ciardini, Heejin Hwang, Barbara Stenni, Jacopo Gabrieli, Rita Traversi, Silvia Becagli, Biancamaria Narcisi, Roberto Udisti, I. Crotti, Massimo Frezzotti, Giuliano Dreossi, Mirko Severi, E. Selmo, Sang-Bum Hong, Laura Caiazzo, Yeongcheol Han, Giovanni Baccolo, Jung-Ho Kang, Andrea Spolaor, Soon Do Hur, Barbara Delmonte, Marco Proposito, Fabio Giardi, Carlo Barbante, Michele Bertò |
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| Přispěvatelé: | Caiazzo, L., Baccolo, G., Barbante, C., Becagli, S., Berto, M., Ciardini, V., Crotti, I., Delmonte, B., Dreossi, G., Frezzotti, M., Gabrieli, J., Giardi, F., Han, Y., Hong, S. -B., Hur, S. D., Hwang, H., Kang, J. -H., Narcisi, B., Proposito, M., Scarchilli, C., Selmo, E., Severi, M., Spolaor, A., Stenni, B., Traversi, R., Udisti, R., Caiazzo, L, Baccolo, G, Barbante, C, Becagli, S, Bertò, M, Ciardini, V, Crotti, I, Delmonte, B, Dreossi, G, Frezzotti, M, Gabrieli, J, Giardi, F, Han, Y, Hong, S, Hur, S, Hwang, H, Kang, J, Narcisi, B, Proposito, M, Scarchilli, C, Selmo, E, Severi, M, Spolaor, A, Stenni, B, Traversi, R, Udisti, R |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Snow pit
Environmental Engineering 010504 meteorology & atmospheric sciences Chemical composition Dating East Antarctica GV7 Seasonal pattern Chemistry (all) Environmental Chemistry Health Toxicology and Mutagenesis GEO/04 - GEOGRAFIA FISICA E GEOMORFOLOGIA Antarctic ice sheet Antarctic Regions Mineral dust Oxygen Isotopes 010502 geochemistry & geophysics 01 natural sciences Isotopes of oxygen Snow Ice Cover Oxygen Isotope Precipitation Aerosol 0105 earth and related environmental sciences Aerosols Antarctic Region Pacific Ocean Sulfur Compounds Firn Public Health Environmental and Occupational Health Australia Dust General Medicine General Chemistry Sea spray Pollution Oceanography Settore GEO/08 - Geochimica e Vulcanologia Environmental science Physical geography Seasons Season Environmental Monitoring |
| Zdroj: | Chemosphere 176 (2017): 273–287. doi:10.1016/j.chemosphere.2017.02.115 info:cnr-pdr/source/autori:Caiazzo, L.; Baccolo, G.; Barbante, C.; Becagli, S.; Bertò, M.; Ciardini, V.; Crotti, I.; Delmonte, B.; Dreossi, G.; Frezzotti, M.; Gabrieli, J.; Giardi, F.; Han, Y.; Hong, S. B.; Hur, S. D.; Hwang, H.; Kang, J. H.; Narcisi, B.; Proposito, M.; Scarchilli, C.; Selmo, E.; Severi, M.; Spolaor, A.; ; Stenni, B.; Traversi, R.; Udisti, R./titolo:Prominent features in isotopic, chemical and dust stratigraphies from coastal East Antarctic ice sheet (Eastern Wilkes Land)/doi:10.1016%2Fj.chemosphere.2017.02.115/rivista:Chemosphere/anno:2017/pagina_da:273/pagina_a:287/intervallo_pagine:273–287/volume:176 |
| DOI: | 10.1016/j.chemosphere.2017.02.115 |
| Popis: | In this work we present the isotopic, chemical and dust stratigraphies of two snow pits sampled in 2013/14at GV7 (coastal East Antarctica: 70°41′ S - 158°51′ E, 1950 m a.s.l.). A large number of chemical species are measured aiming to study their potentiality as environmental changes markers. Seasonal cluster backward trajectories analysis was performed and compared with chemical marker stratigraphies. Sea spray aerosol is delivered to the sampling site together with snow precipitation especially in autumn-winter by air masses arising from Western Pacific Ocean sector. Dust show maximum concentration in spring when the air masses arising from Ross Sea sector mobilize mineral dust from ice-free areas of the Transantarctic mountains. The clear seasonal pattern of sulfur oxidized compounds allows the dating of the snow-pit and the calculation of the mean accumulation rate, which is 242±71mm w.e. for the period 2008–2013. Methanesulfonic acid and NO3− do not show any concentration decreasing trend as depth increases, also considering a 12m firn core record. Therefore these two compounds are not affected by post-depositional processes at this site and can be considered reliable markers for past environmental changes reconstruction. The rBC snow-pit record shows the highest values in summer 2012 likely related to large biomass burning even occurred in Australia in this summer. The undisturbed accumulation rate for this site is demonstrated by the agreement between the chemical stratigraphies and the annual accumulation rate of the two snow-pits analysed in Italian and Korean laboratories. |
| Databáze: | OpenAIRE |
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