冰川波动录情况安第斯的历史记

发布时间：2025-05-07 02:12:25 来源：瓮天之见网 作者：综合

摘要：安第斯冰川是动情过去和现在气候趋势的灵敏指示器。而过去200年冰川大小的历史剧减达消退到了前所未有的程度。这个结果与同一模型对整个世界的记录估计是接近的。

Nature：安第斯冰川波动情况的安第历史记录

摘要：安第斯冰川是过去和现在气候趋势的灵敏指示器。预测估计，斯冰热带安第斯山脉中气温要升高4º–5ºC，川波Jomelli等人发表了有关玻利维亚安第斯山中Telata冰川动态的一个详细的铍-10冰川年代表，

生物探索推荐英文原文

Irregular tropical glacier retreat over the Holocene epoch driven by progressive warming

The causes and timing of tropical glacier fluctuations during the Holocene epoch (10,000 years ago to present) are poorly understood. Yet constraining their sensitivity to changes in climate1 is important, as these glaciers are both sensitive indicators of climate change and serve as water reservoirs for highland regions2. Studies have so far documented extra-tropical glacier fluctuations3, 4, but in the tropics, glacier–climate relationships are insufficiently understood. Here we present a 10Be chronology for the past 11,000 years (11 kyr), using 57 moraines from the Bolivian Telata glacier (in the Cordillera Real mountain range). This chronology indicates that Telata glacier retreated irregularly. A rapid and strong melting from the maximum extent occurred from 10.8 ± 0.9 to 8.5 ± 0.4 kyr ago, followed by a slower retreat until the Little Ice Age, about 200 years ago. A dramatic increase in the rate of retreat occurred over the twentieth century. A glacier–climate model indicates that, relative to modern climate, annual mean temperature for the Telata glacier region was −3.3 ± 0.8 °C cooler at 11 kyr ago and remained −2.1 ± 0.8 °C cooler until the end of the Little Ice Age. We suggest that long-term warming of the eastern tropical Pacific and increased atmospheric temperature in response to enhanced austral summer insolation were the main drivers for the long-term Holocene retreat of glaciers in the southern tropics.

Subject terms:Climate science   Environmental science   Geology and geophysics    Earth science

Pictured: a, Location of the high Zongo valley. b, Local map showing the study sites: 1, the Telata glacier; 2, the location of the Zongo glacier; filled triangles, summits. c, Map of the Telata glacier, showing dated and undated Holocene moraines

Pictured: The colour shading shows temperature in °C (a) or temperature difference (b–d).

原文链接：https://www.nature.com/nature/journal/v474/n7350/full/nature10150.html

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