气候变化领域集成服务门户(CCPortal): Rare earth elements from the Atlantic Sector

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.756834
	Rare earth elements from the Atlantic Sector
	Wegner; Anna; Gabrielli; Paolo; Wilhelms-Dick; Dorothee; Ruth; Urs; Kriews; Michael; De Deckker; Patrick; Barbante; Carlo; Cozzi; Giulio; Delmonte; Barbara; Fischer; Hubertus
发布日期	2012-02-02
数据集类型	dataset
英文简介	We present a Rare Earth Elements (REE) record at decadal resolution determined in the EPICA ice core drilled in Dronning Maud Land (EDML) in the Atlantic Sector of the East Antarctic Plateau, covering the transition from the last glacial age (LGA) to the early Holocene (26 600-7500 yr BP). Additionally, samples from potential source areas (PSAs) for Antarctic dust were analysed for their REE characteristics. The dust provenance is discussed by comparing the REE fingerprints in the ice core and the PSAs samples. We find a shift in REE composition at 15 200 yr BP in the ice core samples. Before 15 200 yr BP, the dust composition is very uniform and its provenance was likely to be dominated by a South American source. After 15 200 yr BP, multiple sources such as Australia and New Zealand become relatively more important, albeit South America is possibly still an important dust supplier. A similar change in the dust characteristics was observed in the EPICA Dome C ice core at around ~15 000 yr BP. A return to more glacial dust characteristics between ~8300 and ~7500 yr BP, as observed in the EPICA Dome C core, could not be observed in the EDML core. Consequently, the dust provenance at the two sites must have been different at that time.
空间范围	Median Latitude: -61.004250 * Median Longitude: 23.904503 * South-bound Latitude: -77.830000 * West-bound Longitude: -74.100000 * North-bound Latitude: -16.550000 * East-bound Longitude: 172.520000
时间范围	2001-01-10T00:00:00 - 2006-01-17T00:00:00
语种	英语
国家	国际
学科大类	气候变化
学科子类	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/226932
推荐引用方式 GB/T 7714	Wegner,Anna,Gabrielli,et al. Rare earth elements from the Atlantic Sector.2012-02-02.https://doi.org/10.1594/PANGAEA.756834.