气候变化领域集成服务门户(CCPortal): Stable water isotope record from block profiles in the ice tunnel at Chli Titlis glacier, Switzerland

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.885082
	Stable water isotope record from block profiles in the ice tunnel at Chli Titlis glacier, Switzerland
	Bohleber; Pascal; Hoffmann; Helene; Kerch; Johanna; Sold; Leo; Fischer; Andrea
发布日期	2018-01-16
数据集类型	dataset
英文简介	Cold glaciers at the highest locations of the European Alps have been investigated by drilling ice cores to retrieve their stratigraphic climate records. Findings like the Oetztal ice man have demonstrated that small ice bodies at summit locations of comparatively lower altitudes may also contain old ice if locally frozen to the underlying bedrock. In this case, constraining the maximum age of their lowermost ice part may help to identify past periods with minimum ice extent in the Alps. However, with recent warming and consequent glacier mass loss, these sites may not preserve their unique climate information for much longer. Designed as a case study for investigating the maximum age of cold-based summit glaciers in the Alps, we utilized here an existing ice cave at Chli Titlis (3030 m), Central Switzerland. The cave offers direct access to the glacier stratigraphy without the logistical effort required in ice core drilling. In addition, a pionieering exploration had already demonstrated stagnant cold ice conditions at Chli Titlis, albeit more than 25 years ago. Our englacial temperature measurements and the analysis of the isotopic and physical properties of ice blocks sampled at three locations within the ice cave show that cold ice still exists fairly unchanged today. State-of-the-art micro-radiocarbon analysis constrains the maximum age of the ice at Chli Titlis to about 5000 years before present. By this means, the approach presented here will contribute to a future systematic investigation of cold-based summit glaciers, also in the Eastern Alps.
空间范围	Latitude: 46.770850 * Longitude: 8.423460
时间范围	2014-01-01T00:00:00 - 2015-08-01T00:00:00
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/215268
推荐引用方式 GB/T 7714	Bohleber,Pascal,Hoffmann,et al. Stable water isotope record from block profiles in the ice tunnel at Chli Titlis glacier, Switzerland.2018-01-16.https://doi.org/10.1594/PANGAEA.885082.