Fire and vegetation dynamics in northwest Siberia during the last 60 years based on high-resolution remote sensing

doi:10.5194/bg-18-207-2021

GSTDTAP > 资源环境科学

DOI	10.5194/bg-18-207-2021
	Fire and vegetation dynamics in northwest Siberia during the last 60 years based on high-resolution remote sensing
	admin
	2021-02-01
出版年	2021
国家	欧洲
领域	气候变化 ; 资源环境
英文摘要	The rapidly warming Arctic undergoes transitions that can influence global carbon balance. One of the key processes is the shift towards vegetation types with higher biomass underlining a stronger carbon sink. The shift is predicted by bioclimatic models based on abiotic climatic factors, but it is not always confirmed with observations. Recent studies highlight the role of disturbances in the shift. Here we use high-resolution remote sensing to study the process of transition from tundra to forest and its connection to wildfires in the 20 000 km2 area in northwest Siberia. Overall, 40 % of the study area was burned during a 60-year period. Three-quarters of the burned areas were dry tundra. About 10 % of the study area experienced two–three fires with an interval of 15–60 years suggesting a shorter fire return interval than that reported earlier for the northern areas of central Siberia (130–350 years). Based on our results, the shift in vegetation (within the 60-year period) occurred in 40 %–85 % of the burned territories. All fire-affected territories were flat; therefore no effect of topography was detected. Oppositely, in the undisturbed areas, a transition of vegetation was observed only in 6 %–15 % of the territories, characterized by steeper topographic slopes. Our results suggest a strong role of disturbances in the tree advance in northwest Siberia.
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来源平台	European Geosciences Union
引用统计
文献类型	科技报告
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/314111
专题	资源环境科学气候变化
推荐引用方式 GB/T 7714	admin. Fire and vegetation dynamics in northwest Siberia during the last 60 years based on high-resolution remote sensing,2021.