气候变化领域集成服务门户(CCPortal): Chemistry record of icecore BER11C95

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DOI	https://doi.org/10.1594/PANGAEA.400910
	Chemistry record of icecore BER11C95_25
	Ruth; Urs; Wagenbach; Dietmar; Oerter; Hans
发布日期	2004-05-28
数据集类型	dataset
英文简介	A 181 m deep ice core drilled in 1994/95 on the south dome of Berkner Island, Antarctica, was analyzed for stable isotopes, major ions and microparticle concentrations. Samples for ion chromatography were prepared by using a novel technique of filling decontaminated sample from a device for continuous ice-core melting directly into the sample vials. The core was dated through identification of volcanic horizons and interpolative layer counting. The core, together with a similar core from the north dome, reveals a 1000 year history of relatively stable climate. Temporal variations in the two cores deviate from each other owing to changing patterns of regional-scale circulation; the best correspondence between them is found for MSA-. delta18O, accumulation rate and a sea-salt proxy show only negligible correlation, which suggests a complex meteorological setting. Increasing annual accumulation is observed for the last 100 years. A period of increased sea-salt concentrations started around AD 1405, as has also been observed in other cores. Microparticle concentrations are on average 1220 particles (>=1.0 ?m diameter)/mL; they are enhanced from AD 1200 to 1350, possibly because of a higher atmospheric mineral dust load or because local volcanic activity was stronger than previously thought. Microparticles and NH4+show marked but multiple and very irregular sub-annual peaks; long-term stacking of 1 year data intervals yields seasonal maxima in austral spring or mid-summer, respectively. Post-depositional redistribution was observed for MSA, NO3- and F- at volcanic horizons.
空间范围	Latitude: -79.614160 * Longitude: -45.724330
时间范围	1995-02-08T00:00:00 - 1995-02-08T00:00:00
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/213986
推荐引用方式 GB/T 7714	Ruth,Urs,Wagenbach,et al. Chemistry record of icecore BER11C95_25.2004-05-28.https://doi.org/10.1594/PANGAEA.400910.