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西伯利亚的野火-烟雾-降雨相互作用:来自区域模型研究的见解
Igor B Konovalov1, Nikolai A Golovushkin1, Matthias Beekmann2
1A.V. Gaponov-Grekhov Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod, Russia.
The Science of the total environment
|August 16, 2024
概括
西伯利亚野火烟雾影响地区降水,产生反循环,使泰加地区的火灾加剧27%,但在原地区减少了14%的排放.
科学领域:
- 大气科学 大气科学
- 环境科学 环境科学
- 气候科学 气候科学
背景情况:
- 西伯利亚的野火释放出大量的烟雾气溶,影响天气,并可能产生火灾天气反循环.
- 目前对西伯利亚烟雾天气相互作用和火灾天气反的理解仍然有限.
- 西伯利亚作为一个主要的全球碳汇的作用,需要了解这些过程,以预测气候变化.
研究的目的:
- 为了研究烟雾气溶和西伯利亚的天气模式之间的复杂相互作用.
- 量化烟雾引起的降雨变化和野火排放之间的反机制.
- 通过结合这些反循环来改进气候变化模型.
主要方法:
- 使用CHIMERE和WRF模型对西伯利亚地区进行合的气象化学模拟.
- 建模场景考虑了气溶-辐射相互作用 (ARI) 和气溶-云相互作用 (ACI) 联合和单独.
- 模拟结果与卫星检索的排放和降水数据的验证.
主要成果:
- 在西伯利亚山林中,烟雾诱导的降水抑制产生了积极的反,增加了27% (±7%) 的生物质燃烧 (BB) 气溶排放量.
- 在原地区,气溶相互作用 (ACI和ARI) 增加了火点上的降水量,导致负反循环,使BB气溶排放量减少了14% (±6%).
- 证据表明,在西伯利亚的烟雾改变降雨和野火排放之间存在显著的反.
结论:
- 烟雾引起的降水变化对西伯利亚的野火排放有很大影响,对冲的反效应在泰加和原.
- 准确地纳入这些烟雾-天气-火灾反机制对于区域和全球气候变化预测至关重要.
- 需要进一步的研究才能充分理解和建模西伯利亚的这些关键相互作用.
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