FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W25029912> ?p ?o ?g. }

• W25029912 abstract "The study of climate necessarily involves the collection and processing of large amounts of data gathered from polar ice cores which are an excellent way of finding how the climate has changed. In this context, I provide the longest records of crustal elements, metals, metalloids, rare earth elements, lead isotopes and mercury taking advantage of the 3270m EPICA/Dome C ice core located in East Antarctica. These elements have been studied in various sections of the EPICA/Dome C deep ice core from 263 ky to 671 ky BP. For crustal elements, metals, metalloids, rare earth elements and mercury, the analyses were performed by Inductively Coupled Plasma Sector Field Mass Spectrometry whilst the analyses of lead isotopes were performed by Thermal Ionization Mass Spectrometry and the analyses of mercury species (methylmercury and inorganic mercury) by Inductively Coupled Plasma Time of Flight Sector Field Mass Spectrometry, in clean room conditions. The study of crustal trace elements (V, Cr, Mn, Fe, Co, Rb, Ba and U) allowed to document large natural variations in the occurrence of several crust derived elements in Antarctic ice from 263 to 671 ky BP. I show that the concentrations were highly variable, with low values during warm periods (interglacials) and much higher values during the coldest stages (glacial maxima). The advection of crustal trace elements to the East Antarctic plateau is found to occur when a well-defined critical δD value (~ - 430‰) was reached. For the first time, the rare earth elements (REE) were analyzed in a deep ice core. The REE of continental origin windblown to the East Antarctica have been studied for their geographical provenance during this time period. In this way, crustal trace elements provenance in glacial and interglacials epochs has been identified through the rare earth elements signature and sediments from Potential Source Areas (PSA) of the Southern Hemisphere. During less pronounced glacial maxima (MIS 12.2, 12.4 and 14.2) at Dome C in East Antarctica, REE show that dust materials come from at 50% to Australia and at 50% to Cordoba province whilst during more pronounced glacial maxima (MIS 8.2, MIS 10.2, 10.4 and 16.2) they come from at 90 to 80% to Cordoba province and at 10 to 20% to Australia. Moreover, Antarctic dust during interglacial periods consist of a mixture of South America (South Argentina, Central Argentina and perhaps Patagonia), the Transantarctic Mountains (Koettkitz glacier) and Australian materials. Metals and Metalloids concentrations have been performed from 263 to 671 ky BP in order to examine the long-term variability, from which important information about the contribution of various sources and the transport patterns can be inferred. The concentrations were highly variable with low values during warm periods and high values during cold periods. However, the maximum amplitude of the variations markedly differs from one element to another. In particular, lead isotopes data provide an important contribution to the developing understanding of the variation of continental dust compositions present across Antarctica. Finally, for the first time, total mercury, methylmercury and inorganic mercury have been measured in a deep ice core. It can be observed that concentration values varied considerably, with low values during interglacials and higher values during the coldest periods. The determination aimed at determining possible variations in oceanic paleoproductivity and Hg deposition processed over 671 ky BP." @default.
• W25029912 created "2016-06-24" @default.
• W25029912 creator A5053568192 @default.
• W25029912 date "2007-12-14" @default.
• W25029912 modified "2023-09-23" @default.
• W25029912 title "Past natural changes in Trace elements, Rare Earth Elements (REE), mercury and lead isotopes in the EPICA/Dome C ice core (East Antarctica) from 263,000 to 671,000 yrs BP" @default.
• W25029912 cites W11113531 @default.
• W25029912 cites W1487925322 @default.
• W25029912 cites W1498216505 @default.
• W25029912 cites W1499431037 @default.
• W25029912 cites W1502853825 @default.
• W25029912 cites W1512802592 @default.
• W25029912 cites W1523074846 @default.
• W25029912 cites W1525172795 @default.
• W25029912 cites W1525866156 @default.
• W25029912 cites W1548418097 @default.
• W25029912 cites W1557510474 @default.
• W25029912 cites W1561461955 @default.
• W25029912 cites W1573522038 @default.
• W25029912 cites W1596673349 @default.
• W25029912 cites W1601283439 @default.
• W25029912 cites W1624806571 @default.
• W25029912 cites W1678731863 @default.
• W25029912 cites W1880555926 @default.
• W25029912 cites W1930220432 @default.
• W25029912 cites W1951861833 @default.
• W25029912 cites W1964387217 @default.
• W25029912 cites W1965888965 @default.
• W25029912 cites W1966372204 @default.
• W25029912 cites W1967749923 @default.
• W25029912 cites W1968284293 @default.
• W25029912 cites W1968346323 @default.
• W25029912 cites W1970009412 @default.
• W25029912 cites W1970414329 @default.
• W25029912 cites W1971341362 @default.
• W25029912 cites W1974271494 @default.
• W25029912 cites W1976550006 @default.
• W25029912 cites W1976679675 @default.
• W25029912 cites W1977113371 @default.
• W25029912 cites W1977457396 @default.
• W25029912 cites W1978556416 @default.
• W25029912 cites W1980413864 @default.
• W25029912 cites W1981910844 @default.
• W25029912 cites W1982908157 @default.
• W25029912 cites W1985250047 @default.
• W25029912 cites W1986693275 @default.
• W25029912 cites W1987969549 @default.
• W25029912 cites W1988039549 @default.
• W25029912 cites W1988332288 @default.
• W25029912 cites W1988477217 @default.
• W25029912 cites W1988742016 @default.
• W25029912 cites W1988890686 @default.
• W25029912 cites W1989487187 @default.
• W25029912 cites W1989521300 @default.
• W25029912 cites W1990517334 @default.
• W25029912 cites W1991215505 @default.
• W25029912 cites W1991538617 @default.
• W25029912 cites W1991608935 @default.
• W25029912 cites W1991752675 @default.
• W25029912 cites W1991841036 @default.
• W25029912 cites W1992217512 @default.
• W25029912 cites W1992641015 @default.
• W25029912 cites W1995457309 @default.
• W25029912 cites W1995458045 @default.
• W25029912 cites W1995505609 @default.
• W25029912 cites W1995729749 @default.
• W25029912 cites W1997337776 @default.
• W25029912 cites W1998949482 @default.
• W25029912 cites W1999149960 @default.
• W25029912 cites W2000616616 @default.
• W25029912 cites W2000971658 @default.
• W25029912 cites W2002371829 @default.
• W25029912 cites W2003210399 @default.
• W25029912 cites W2003400096 @default.
• W25029912 cites W2003576263 @default.
• W25029912 cites W2005907598 @default.
• W25029912 cites W2006480128 @default.
• W25029912 cites W2006977193 @default.
• W25029912 cites W2008265054 @default.
• W25029912 cites W2008760455 @default.
• W25029912 cites W2008875043 @default.
• W25029912 cites W2010504509 @default.
• W25029912 cites W2010827259 @default.
• W25029912 cites W2010841002 @default.
• W25029912 cites W2011160554 @default.
• W25029912 cites W2011470785 @default.
• W25029912 cites W2012655165 @default.
• W25029912 cites W2015623464 @default.
• W25029912 cites W2017770423 @default.
• W25029912 cites W2018102524 @default.
• W25029912 cites W2021949139 @default.
• W25029912 cites W2022387278 @default.
• W25029912 cites W2023151743 @default.
• W25029912 cites W2023511823 @default.
• W25029912 cites W2024906777 @default.
• W25029912 cites W2027221879 @default.
• W25029912 cites W2027648597 @default.
• W25029912 cites W2029361786 @default.
• W25029912 cites W2029411340 @default.
• W25029912 cites W2029763967 @default.

• next