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首页> 外文期刊>Science Advances >Extensive fires in southeastern Siberian permafrost linked to preceding Arctic Oscillation
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Extensive fires in southeastern Siberian permafrost linked to preceding Arctic Oscillation

机译：西伯利亚的广泛火灾，联系到北极振荡之前

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Carbon release through boreal fires could considerably accelerate Arctic warming; however, boreal fire occurrence mechanisms and dynamics remain largely unknown. Here, we analyze fire activity and relevant large-scale atmospheric conditions over southeastern Siberia, which has the largest burned area fraction in the circumboreal and high-level carbon emissions due to high-density peatlands. It is found that the annual burned area increased when a positive Arctic Oscillation (AO) takes place in early months of the year, despite peak fire season occurring 1 to 2 months later. A local high-pressure system linked to the AO drives a high-temperature anomaly in late winter, causing premature snowmelt. This causes earlier ground surface exposure and drier ground in spring due to enhanced evaporation, promoting fire spreading. Recently, southeastern Siberia has experienced warming and snow retreat; therefore, southeastern Siberia requires appropriate fire management strategies to prevent massive carbon release and accelerated global warming.
机译：碳释放通过北极火灾可能会加速北极变暖;然而，北方火灾发生机制和动态仍然很大程度上是未知的。在这里，我们分析了Southtextern Siberia的消防活动和相关的大型大气条件，由于高密度的泥炭块，在炭线和高水平的碳排放中具有最大的烧毁区域分数。结果发现，尽管火灾季节发生在一年的初期，年初北极振荡（AO）发生了阳性北极振荡（AO）。与AO相关的本地高压系统驱动了晚冬季的高温异常，导致过早的冰雪。由于增强蒸发，促进火蔓延，这导致弹簧的早期地面曝光和干燥接地。最近，西伯利亚东南部经历了变暖和雪地休息;因此，西伯利亚东南部需要适当的火灾管理策略，以防止大规模碳释放和加速全球变暖。

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