气候变化领域集成服务门户(CCPortal): Pb and Ba concentrations and Pb isotope ratios in EPICA Dome C ice 2-217 ky BP

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.767617
	Pb and Ba concentrations and Pb isotope ratios in EPICA Dome C ice 2-217 ky BP
	Vallelonga; Paul T; Gabrielli; Paolo; Balliana; E; Wegner; Anna; Delmonte; Barbara; Turetta; Clara; Burton; G; Vanhaecke; Frank; Rosman; K J R; Hong; Sungmin; Boutron; Claude F; Cescon; Paolo; Barbante; Carlo
发布日期	2011-09-01
数据集类型	dataset
英文简介	A record of Pb isotopic compositions and Pb and Ba concentrations are presented for the EPICA Dome C ice core covering the past 220 ky, indicating the characteristics of dust and volcanic Pb deposition in central East Antarctica. Lead isotopic compositions are also reported in a suite of soil and loess samples from the Southern Hemisphere (Australia, Southern Africa, Southern South America, New Zealand, Antarctica) in order to evaluate the provenance of dust present in Antarctic ice. Lead isotopic compositions in Dome C ice support the contention that Southern South America was an important source of dust in Antarctica during the last two glacial maxima, and furthermore suggest occasional dust contributions from local Antarctic sources. The isotopic signature of Pb in Antarctic ice is altered by the presence of volcanic Pb, inhibiting the evaluation of glacial–interglacial changes in dust sources and the evaluation of Australia as a source of dust to Antarctica. Consequently, an accurate evaluation of the predominant source(s) of Antarctic dust can only be obtained from glacial maxima, when dust-Pb concentrations were greatest. These data confirm that volcanic Pb is present throughout Antarctica and is emitted in a physical phase that is free from Ba, while dust Pb is transported within a matrix containing Ba and other crustal elements.
空间范围	Latitude: -75.100000 * Longitude: 123.350000
时间范围	1993-01-01T00:00:00 - 2004-12-31T00:00:00
语种	英语
国家	国际
学科大类	气候变化
学科子类	冰冻圈
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/213813
推荐引用方式 GB/T 7714	Vallelonga,Paul T,Gabrielli,et al. Pb and Ba concentrations and Pb isotope ratios in EPICA Dome C ice 2-217 ky BP.2011-09-01.https://doi.org/10.1594/PANGAEA.767617.