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A 1200-year record of forest fire history from macroscopic charcoal preserved in lake sediment, south-central Yukon Territory.

机译：育空地区中南部湖泊沉积物中保存的宏观木炭记录了1200年的森林火灾历史。

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High resolution analysis of macroscopic charcoal (CHAR) in a sediment core from Burnt Bowl Lake and stand-age information from tree rings were used to develop a fire history reconstruction spanning the last 1200 years in south-central Yukon Territory. Loss-on-ignition (LOI) and magnetic susceptibility were also examined to detect changes in allochthonous sediment inputs associated with past fire events. The CHAR record distinguished 20 fire events and indicates that fire frequency increased from ca. 800 to 1260 A.D., stabilized between ca. 1260 and 1600 A.D. and continued to increase from ca. 1600 A.D. to present. Periods of increasing fire frequency correspond to periods of low precipitation, associated with an intensification of the Aleutian Low pressure system, and increased temperatures during the Medieval Warm Period and following the Little Ice Age (LIA) suggesting that fire frequency in this region is controlled by climate. Post-LIA fire frequencies also reflect the influence of anthropogenic ignitions.

机译：高分辨率分析了Burnt Bowl Lake沉积物核心中的宏观木炭（CHAR），并使用年轮上的树龄信息来开发横跨育空地区中南部近1200年的火灾历史重建。还检查了失火（LOI）和磁化率，以检测与过去火灾相关的异源沉积物输入的变化。 CHAR记录区分了20起火警事件，并指出火警频率从ca开始增加。公元800至1260年，稳定在大约公元1260年和1600年，并且从大约到公元1600年为止。火灾频率增加的时期对应于降水减少的时期，这与阿留申低压系统的增强有关，并且在中世纪温暖时期和小冰期（LIA）之后温度升高，这表明该地区的火灾频率受气候。 LIA后的火灾频率也反映了人为点火的影响。

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作者
Marcantonio, Richard V. O.;
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作者单位

Carleton University (Canada).;

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授予单位 Carleton University (Canada).;
学科 Geology.; Paleontology.
学位 M.Sc.
年度 2007
页码 98 p.
总页数 98
原文格式 PDF
正文语种 eng
中图分类地质学;古生物学;
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8. Radiometric Ages of Rocks in South-Central Alaska and Western Yukon Territory. [R] . Dadisman, S. V. 1980

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A 1200-year record of forest fire history from macroscopic charcoal preserved in lake sediment, south-central Yukon Territory.

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