首页> 外文期刊>Quaternary Research: An Interdisciplinary Journal >A latest Pleistocene and Holocene glacial history and paleoclimate reconstruction at Three Sisters and Broken Top Volcanoes, Oregon, USA
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A latest Pleistocene and Holocene glacial history and paleoclimate reconstruction at Three Sisters and Broken Top Volcanoes, Oregon, USA

机译:美国俄勒冈州三姐妹山和断顶火山的最新更新世和全新世冰川历史和古气候重建

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摘要

At least three sets of moraines mark distinct glacial stands since the last glacial maximum (LGM) in the Three Sisters region of the Oregon Cascade Range. The oldest stand predates 8.1 ka (defined here as post-LGM), followed by a second between similar to 2 and 8 ka (Neoglacial) and a third from the Little Ice Age (LIA) advance of the last 300 years. The post-LGM equilibrium line altitudes were 260 100 m lower than that of modern glaciers, requiring 23 +/- 9% increased winter snowfall and 1.4 +/- 0.5 degrees C cooler summer temperatures than at present. The LIA advance had equilibrium line altitudes 110 40 in lower than at present, implying 10 +/- 4% greater winter snowfall and 0.6 +/- 0.2 degrees C cooler surnmer temperatures. (c) 2008 University of Washington. All rights reserved.
机译:自从俄勒冈喀斯喀特山脉三姐妹峰地区的最后一次冰期最大值(LGM)以来,至少有三组冰rain标志着明显的冰原。最古老的林分早于8.1 ka(此处定义为LGM后),其后第二分类似于2ka至8 ka(冰期),第三分则来自最近300年的小冰期(LIA)。 LGM后的平衡线高度比现代冰川低260 100 m,这要求冬季降雪增加23 +/- 9%,夏季温度要比目前低1.4 +/- 0.5摄氏度。 LIA前进的平衡线高度比现在的低110 40,这意味着冬季降雪量增加了10 +/- 4%,冲浪者温度降低了0.6 +/- 0.2摄氏度。 (c)2008年华盛顿大学。版权所有。

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