气候变化领域集成服务门户(CCPortal): Dust and calcium record in calculated for ice core EPICA Dome C

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DOI	https://doi.org/10.1594/PANGAEA.779311
	Dust and calcium record in calculated for ice core EPICA Dome C
	Lambert; Fabrice; Bigler; Matthias; Steffensen; Jørgen Peder; Hutterli; Manuel A; Fischer; Hubertus
发布日期	2012-04-14
数据集类型	dataset
英文简介	Ice core data from Antarctica provide detailed insights into the characteristics of past climate, atmospheric circulation, as well as changes in the aerosol load of the atmosphere. We present high-resolution records of soluble calcium (Ca2+), non-sea-salt soluble calcium (nssCa2+), and particulate mineral dust aerosol from the East Antarctic Plateau at a depth resolution of 1 cm, spanning the past 800 000 years. Despite the fact that all three parameters are largely dust-derived, the ratio of nssCa2+ to particulate dust is dependent on the particulate dust concentration itself. We used principal component analysis to extract the joint climatic signal and produce a common high-resolution record of dust flux. This new record is used to identify Antarctic warming events during the past eight glacial periods. The phasing of dust flux and CO2 changes during glacial-interglacial transitions reveals that iron fertilization of the Southern Ocean during the past nine glacial terminations was not the dominant factor in the deglacial rise of CO2 concentrations. Rapid changes in dust flux during glacial terminations and Antarctic warming events point to a rapid response of the southern westerly wind belt in the region of southern South American dust sources on changing climate conditions. The clear lead of these dust changes on temperature rise suggests that an atmospheric reorganization occurred in the Southern Hemisphere before the Southern Ocean warmed significantly.
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	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/226926
推荐引用方式 GB/T 7714	Lambert,Fabrice,Bigler,et al. Dust and calcium record in calculated for ice core EPICA Dome C.2012-04-14.https://doi.org/10.1594/PANGAEA.779311.