利用傅立叶变换红外光谱评估澳大利亚东南部高强度火灾事件的变化

IF 2.9 3区 农林科学 Q1 FORESTRY
Rebecca Ryan, Zoë Thomas, Ivan Simkovic, Pavel Dlapa, Martin Worthy, Robert Wasson, Ross Bradstock, Scott Mooney, Katharine Haynes, Anthony Dosseto
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引用次数: 0

摘要

背景随着火灾机制不断随气候变化而演变,了解火灾特征如何应对近期的变化对于预测未来的火灾事件至关重要。目的与方法利用傅立叶变换红外光谱(FTIR),我们评估了澳大利亚东南部(1)蓝山和(2)纳马吉国家公园在过去 3000 年中火灾强度的变化情况。主要结果较高的芳香族/脂肪族比率表明,这两个岩心地表沉积物中的高强度火灾频率有所增加。极端干旱期频率的增加,再加上植被的变化和殖民化后的人为点火,可能增加了过去约 200 年中高强度火灾的频率。结论FTIR 光谱法可用于沉积物中,推断出与之前的约 3000 年相比,过去 200 年中高强度火灾事件的频率有所增加。意义这些结果对于了解过去的火灾机制如何应对过去约 3000 年的气候、人类和植被变化非常重要,可用于为未来预测和管理策略模型提供信息。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Assessing changes in high-intensity fire events in south-eastern Australia using Fourier Transform Infra-red (FITR) spectroscopy
Background

As fire regimes continue to evolve in response to climate change, understanding how fire characteristics have responded to changes in the recent past is vital to inform predictions of future fire events.

Aims and methods

Using Fourier Transform Infrared (FTIR) spectroscopy, we assessed how fire intensity has changed in two fire-prone landscapes in south-eastern Australia: (1) the Blue Mountains; and (2) Namadgi National Park during the past 3000 years.

Key results

Higher aromatic/aliphatic ratios suggest increased high-intensity fire frequency in sediments at the surface of both cores. Increases in the frequency of extreme drought periods, coupled with the change in vegetation and anthropogenic ignitions following colonisation, could have increased the frequency of high-intensity fires in the past ~200 years.

Conclusions

FTIR spectroscopy can be used in sediment deposits to infer that the frequency of high-intensity fire events has increased in the past 200 years compared to the previous ~3000 years.

Implications

These results are important for understanding how past fire regimes have responded to climate, people and vegetation shifts in the past ~3000 years and can be used to inform models for future predictions and management strategies.

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来源期刊
CiteScore
5.50
自引率
9.70%
发文量
67
审稿时长
12-24 weeks
期刊介绍: International Journal of Wildland Fire publishes new and significant articles that advance basic and applied research concerning wildland fire. Published papers aim to assist in the understanding of the basic principles of fire as a process, its ecological impact at the stand level and the landscape level, modelling fire and its effects, as well as presenting information on how to effectively and efficiently manage fire. The journal has an international perspective, since wildland fire plays a major social, economic and ecological role around the globe. The International Journal of Wildland Fire is published on behalf of the International Association of Wildland Fire.
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