globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2017.05.009
Scopus记录号: 2-s2.0-85019399066
论文题名:
Causes of dust size variability in central East Antarctica (Dome B): Atmospheric transport from expanded South American sources during Marine Isotope Stage 2
作者: Delmonte B.; Paleari C.I.; Andò S.; Garzanti E.; Andersson P.S.; Petit J.R.; Crosta X.; Narcisi B.; Baroni C.; Salvatore M.C.; Baccolo G.; Maggi V.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 168
起始页码: 55
结束页码: 68
语种: 英语
英文关键词: Antarctica ; Dust ; Ice cores ; Marine isotope stage 2 ; Micron-size particle Raman mineralogy ; Paleoclimatology ; Provenance ; Quaternary
Scopus关键词: Atmospheric movements ; Domes ; Glacial geology ; Isotopes ; Metamorphic rocks ; Minerals ; Screening ; Sea level ; Sorting ; Strontium ; Troposphere ; Underwater mineralogy ; Volcanic rocks ; Antarctica ; Ice core ; Marine isotope stages ; Micron-size particles ; Paleoclimatology ; Provenance ; Quaternary ; Dust ; atmospheric transport ; diatom ; dust ; eolian deposit ; ice core ; isotopic composition ; marine isotope stage ; mineralogy ; outwash ; paleoclimate ; provenance ; Quaternary ; sea level change ; source apportionment ; Southern Hemisphere ; troposphere ; Antarctic Peninsula ; Antarctica ; East Antarctica ; South America ; West Antarctica ; Bacillariophyta
英文摘要: We here investigate the spatial and temporal variability of eolian dust particle sorting recorded in the Dome B (77° 05′ S, 94° 55’ E) ice core, central East Antarctica, during Marine Isotope Stage (MIS) 2. We address the question whether such changes reflect variable transport pathways from a unique source area or rather a variable apportionment from diverse Southern Hemisphere sources transported at different elevation in the troposphere. The Sr-Nd radiogenic isotope composition of glacial dust samples as well as single-particle Raman mineralogy support the hypothesis of a single dust provenance both for coarse and fine mode dust events at Dome B. The southern South American provenance of glacial dust in Antarctica deduced from these results indicate a dust composition coherent with a mixture of volcanic material and minerals derived from metamorphic and plutonic rocks. Additionally, Dome B glacial samples contain aragonite particles along with diatom valves of marine benthic/epiphytic species and freshwater species living today in the northern Antarctic Peninsula and southern South America. These data suggest contribution from the exposed Patagonian continental shelf and glacial outwash plains of southern Patagonia at the time when sea level reached its minimum. Our results confirm that dust sorting is controlled by the relative intensity of the two main patterns of tropospheric dust transport onto the inner Plateau, i.e. fast low-level advection and long-range high-altitude transport including air subsidence over Antarctica. © 2017
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59196
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作者单位: Department of Earth and Environmental Sciences (DISAT), University Milano-Bicocca, Piazza della Scienza, Milano, Italy; Department of Geosciences, Swedish Museum of Natural History, Box 50 007, Stockholm, Sweden; Univ. Grenoble Alpes, CNRS, IRD, IGE, Grenoble, France; Environnements et Paléoenvironnements Océaniques et Continentaux (UMR EPOC 5805), University of Bordeaux, Allée Geoffroy St Hilaire, Pessac, France; ENEA, C.R. Casaccia, Roma, Italy; Dipartimento di Scienze Della Terra, University of Pisa, Via S. Maria N. 53, Pisa, Italy

Recommended Citation:
Delmonte B.,Paleari C.I.,Andò S.,et al. Causes of dust size variability in central East Antarctica (Dome B): Atmospheric transport from expanded South American sources during Marine Isotope Stage 2[J]. Quaternary Science Reviews,2017-01-01,168
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