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Updated: Sep 18, 2025

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在动态全球植被模型LPJ-GUESS中模拟闪电诱导的树木死亡率
Andreas Krause1, Konstantin Gregor1, Benjamin F Meyer1
1Technical University of Munich, TUM School of Life Sciences, Freising, Germany.
Global change biology
|June 24, 2025
概括
雷击每年会杀死数百万棵树,对森林生态系统和碳循环产生重大影响. 将其纳入生态系统模型对于准确的未来预测至关重要.
科学领域:
- 森林生态 森林生态
- 气候科学 气候科学
- 生态系统建模 生态系统建模
背景情况:
- 闪电是森林生态系统的重大干扰,特别是在热带森林造成大树的死亡.
- 当前的生态系统模型没有考虑因雷击引起的树木死亡率.
- 了解闪电的影响对于准确的森林动态和碳循环预测至关重要.
研究的目的:
- 在LPJ-GUESS动态全球植被模型中实施和评估闪电死亡率模块.
- 探索闪电对森林生态系统的局部和全球影响.
- 评估雷电在全球树木死亡率和死亡生物质中的作用.
主要方法:
- 开发了LPJ-GUESS的随机闪电死亡率模块,这取决于云对地面闪电密度和森林结构.
- 使用来自巴拿马森林遗址的数据对该模块进行校准和验证.
- 将模型应用于全球热带和温带森林,使用替代闪电密度数据集.
主要成果:
- 该模型准确地模拟了巴拿马森林中闪电引起的树木死亡率.
- 全球模拟显示,每年闪电会杀死3.01亿至3.04亿棵树,每年造成0.21至0.30GtC的死亡生物质.
- 如果没有闪电,森林生物质将比现在高出1.3%-1.7%,而非洲热带森林的死亡率最高.
结论:
- 闪电在全球森林生态系统和碳循环中发挥着重要作用.
- 为了改进模型,需要更多关于不同森林类型中闪电引起的树木死亡率的数据.
- 将闪电死亡率纳入生态系统模型对于可靠的未来植被和碳循环预测至关重要,特别是随着闪电活动的增加.
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