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影响苏格兰热带和毛毯沼泽地区野火严重程度的因素
Noemi A L Naszarkowski1, Thomas Cornulier2, Sarah J Woodin3
1School of Biological Sciences, University of Aberdeen, St. Machar Drive, Aberdeen AB24 3UU, UK; The James Hutton Institute, Craigiebuckler, Aberdeen AB15 8QH, UK.
The Science of the total environment
|April 28, 2024
概括
苏格兰热带和沼泽地的野火严重程度受息地类型和地形的影响. 更干燥的条件和特定的天气模式,如高蒸汽压力赤字,增加火灾严重性风险.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 遥感 遥感 遥感 遥感
背景情况:
- 温带热带和毛毯沼泽是罕见的生态系统,面临着日益增加的野火风险.
- 火灾的严重程度,衡量燃料消耗,显著影响生态系统的恢复.
- 了解影响火灾严重性的因素对于有效的野火管理至关重要.
研究的目的:
- 评估影响苏格兰热带和毛毯沼泽地的野火严重程度的因素.
- 评估加拿大火灾天气指数系统 (CFWIS) 在预测火灾严重性的有效性.
- 为了确定关键的环境和天气变量驱动火灾的严重性.
主要方法:
- 在92个野火地点 (2015-2021) 中利用遥感测量烧伤严重程度 (差异化正常化烧伤比率).
- 采用通用添加剂混合模型来分析地形,息地湿度,CFWIS组件和天气数据对火灾严重性的影响.
- 研究了各种天气变量的预测能力,包括降雨量,温度和蒸汽压力缺陷 (VPD).
主要成果:
- 相比于湿地和毛毯沼泽,干燥的热地经历了更高的火灾严重性.
- 地形因素 (坡度,高度,面向南的方面) 与火灾严重程度有积极的相关性.
- 蒸汽压力缺陷 (VPD) 成为最重要的天气变量,在预测严重性方面表现优于CFWIS组件. 干旱代码 (DC) 在CFWIS组件中显示出最高的预测效果.
结论:
- 湿地地和毛毯沼泽地的野火通常严重程度较低,但情况正在发生变化.
- 更温暖,更干燥的天气,特别是高的VPD,增加了严重的火灾的风险.
- 这些严重的火灾对重要的泥炭地碳储量构成重大威胁,需要采取适应性管理策略.
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