Abstract—

The climate change that has taken place in recent decades has significantly increased the threat of the occurrence and distribution of wildfires in northwestern Siberia. However, little is known about the spatial and temporal patterns of fires and their relationship with climate and vegetation in this area. As a result of processing Landsat satellite images for 1985–2017, it was determined that 10.5% of the Western Siberia forest tundra was exposed to fires. The maximum relative area of burned forests (23%) was found in larch and spruce–larch lichen woodlands. One geobotanical indicator of increased fire hazard is the dominance of synusiae of epigeic lichens in the vegetation cover. It is shown that most of the severely burned areas were distributed in the central part of the forest tundra within the largest gas fields. Our results have shown a positive significant correlation between square of areas burned and summer temperature regime (average and maximum summer temperatures) and a negative correlation between burned areas and the amount of summer precipitation. A dendrochronological analysis showed that the frequency of fires varied from 15 to 60 years (an average of about 30 years).

中文翻译：

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西西伯利亚森林苔原野火的时空分析

摘要-

近几十年来发生的气候变化大大增加了西伯利亚西北部野火发生和分布的威胁。但是，关于该地区火灾的时空分布及其与气候和植被的关系知之甚少。处理1985-2017年Landsat卫星图像的结果是，确定西伯利亚西部森林冻原的10.5％暴露于大火。在落叶松和云杉-落叶松地衣林地中发现了最大的相对森林烧毁面积（23％）。火灾危险性增加的一个地质植物学指标是植被覆盖中表层地衣突触的优势。结果表明，大多数严重燃烧的地区分布在最大的气田内的森林苔原的中部。我们的结果表明，燃烧面积的平方与夏季温度状况（平均和最高夏季温度）之间呈正相关，而燃烧面积与夏季降水量之间呈负相关。树木年代学分析表明，起火频率为15至60年（平均约30年）。