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藻类扩张刺激了来自南欧亚永久土泥炭地的氧化 (NO_x) 排放

Chunyan Liu^1,2, Hongyu Yue¹, Wei Zhang¹

¹State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China.

Global change biology

|June 7, 2024

概括

这项研究验证了在偏远的永久土泥炭地中对氧化 (NOx) 排放的离线测量技术. 调查结果显示,大量的氧化物排放受扩张的影响,影响了大气化学和辐射强迫.

科学领域:

大气化学和生物地球化学循环.
永久土生态系统动态和温室气体排放.
环境监测和分析技术验证.

背景情况:

氧化 (NOx) 对大气化学和辐射强迫至关重要.
由于测量的局限性,来自北极环极永久土地区的现场NOx排放仍未得到充分研究.
永久土融化和植被变化,如树扩张,可以改变土壤生物地质化学和排放.

研究的目的:

验证一种离线分析技术,用于测量永久土泥炭地中的NOx流量.
为了在现场量化欧亚大陆南部永久土地区的泥炭地NOx排放量.
评估扩张对氧化物排放和永久土热态的影响.

主要方法:

在线和离线NOx流量测量的比较,使用合成空气冲洗,稳定状态不透明腔法 (2018-2019).
现场NOx流量测量超过两年的永久土泥炭地,不同的微观地形 (洞穴和).
评估氧化物排放和永久土的热状态与 (Alnus sibirica) 的扩张和老化有关.

主要成果:

在线和离线NOx流量测量显示出良好的一致性,验证了远程应用的离线技术.
在永久土泥炭地观察到显著的NOx排放量,在岩微观地形学中更高的流量.
树的扩张大大增加了土壤矿物和NOx排放量,而较旧的树种群的排放量更大.
藻类扩张加剧了永久土的退化,增加了土壤温度和活性层厚度.

结论:

该研究提供了首次现场证据,证明北极环极永久土地区的氧化物排放.
经过验证的离线技术对于在没有电源的情况下进行远程测量是可行的.
藻类扩张是化永久土景观中NOx排放增加的重要驱动因素,影响区域空气质量和气候.
由于永久土融化和植被转移而导致的氧化物排放的变化对生态系统的生产力和辐射强迫有重大影响.

关键词:

在这里,我们可以看到Alder Alder.动态室是一个动态室.和空洞微观地形学氧化物氧化物泥炭地泥炭地泥炭地泥炭地永久土 (Permafrost) 是一个永久土.

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