The Rhone Glacier was smaller than today for most of the Holocene
The Rhone Glacier was smaller than today for most of the Holocene
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DOI：
10.1130/g32145.1
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发表时间：
2011-07-01
期刊：
影响因子：
5.8
通讯作者：
Alley, Richard B.
中科院分区：
文献类型：
--
作者：
Goehring, Brent M.;Schaefer, Joerg M.;Alley, Richard B.
我们提出了新的原位宇宙成因的C-14/Be-10天文钟的发展和应用，最近暴露的冰川前基岩的罗纳冰川，瑞士。结果表明，在全新世，冰川小于今天为6500 +/- 2000年，大于今天为4500 +/- 2000年。这一模式与阿尔卑斯山和斯堪的纳维亚半岛冰川的其他技术的有限数据相一致，但与新西兰南阿尔卑斯山的冰川相反，强调大型山地冰川对小气候变化的高度敏感性。C-14/Be-10精密计时器还显示，罗纳冰川下的磨损率随着冰速的增加而增加。
We present the development and application of the novel in situ cosmogenic C-14/Be-10 chronometer to recently exposed proglacial bedrock of the Rhone Glacier, Switzerland. Results show that during the Holocene, the glacier was smaller than today for 6500 +/- 2000 yr and larger than today for 4500 +/- 2000 yr. This pattern is consistent with limited data from other techniques for glaciers in the Alps and Scandinavia, but in contrast to glaciers from the Southern Alps of New Zealand, emphasizing the high sensitivity of large mountain glaciers to small climate changes. The C-14/Be-10 chronometer also shows that abrasion rates beneath the Rhone Glacier increased with ice speed.