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Title: Fires, vegetation, and human - The history of critical transitions during the last 1000 years in Northeastern Mongolia
Authors: Słowiński, Michał
Obremska, Milena
Avirmed, Dashtseren
Woszczyk, Michał
Adiya, Saruulzaya
Łuców, Dominika
Mroczkowska, Agnieszka
Hałaś, Agnieszka
Szczuciński, Witold
Kruk, Andrzej
Lamentowicz, Mariusz
Stańczak, Joanna
Rudaya, Natalia
Keywords: climate change
human impact
vegetation change
climate reconstruction
peat accumulation
Issue Date: Sep-2022
Citation: Science of the Total Environment 2022, vol. 838: 155660.
Abstract: Fires are natural phenomena that impact human behaviors, vegetation, and landscape functions. However, the long-term history of fire, especially in the permafrost marginal zone of Central Asia (Mongolia), is poorly understood. This paper presents the results of radiocarbon and short-lived radionuclides (210Pb and 137Cs) dating, pollen, geochemical, charcoal, and statistical analyses (Kohonen's artificial neural network) of sediment core obtained from Northern Mongolia (the Khentii Mountains region). Therefore, we present the first high-resolution fire history from Northern Mongolia covering the last 1000 years, based on a multiproxy analysis of peat archive data. The results revealed that most of the fires in the region were likely initiated by natural factors, which were probably related to heatwaves causing prolonged droughts. We have demonstrated the link between enhanced fires and “dzud”, a local climatic phenomenon. The number of livestock, which has been increasing for several decades, and the observed climatic changes are superimposed to cause “dzud”, a deadly combination of droughts and snowy winter, which affects fire intensity. We observed that the study area has a sensitive ecosystem that reacts quickly to climate change. In terms of changes in the vegetation, the reconstruction reflected climate variations during the last millennium, the degradation of permafrost and occurrence of fires. However, more sites with good chronologies are needed to thoroughly understand the spatial relationships between changing climate, permafrost degradation, and vegetation change, which ultimately affect the nomadic societies in the region of Central and Northern Mongolia.
Sponsorship: National Science Centre, Poland (Grant no.: 2017/01/X/ST10/01216 and 2018/31/B/ST10/02498); Polish-Mongolian Joint Research Project – “Environmental changes in the Northern Mongolia under recent and past climate variability”. Russian Science Foundation (Grant No. 20-17-00110)
DOI: 10.1016/j.scitotenv.2022.155660
Appears in Collections:Artykuły naukowe (WNGiG)

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