что такое книга памяти жертв политических репрессий
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что такое книга памяти жертв политических репрессий, Carbon record reveals evidence of extensive human fire use , Onset of extensive human fire use 50,000 y ago | PNAS, Carbon Record Reveals Evidence of Extensive Human Fire Use , Onset of extensive human fire use 50,000 y ago - PubMed, Scientists discover evidence of extensive human fire use , Scientists discover evidence of extensive human fire use , Onset of extensive human fire use 50,000 y ago.,Proceedings .
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This study, published in the Proceedings of the National Academy of Sciences, highlights the presence of charred plant remains — known as pyrogenic carbon — formed when vegetation burns but is not completely consumed by fire. The research reveals a notable increase in fire activity across East Asia approximately 50,000 years ago., Fire is a pivotal aspect of human involvement in the carbon cycle. However, the precise timing of the large-scale human fire use remains uncertain. Here, we report a pyrogenic carbon record of East Asian fire history over the past 300,000 y from the East China Sea. This record suggests a rapid incre …, The research reveals a notable increase in fire activity across East Asia approximately 50,000 years ago. This finding aligns with earlier reports of heightened fire activities in Europe, Southeast Asia, and the Papua New Guinea-Australia region respectively, suggesting a continental-scale intensification of fire use during this period., The widespread use of fire likely propelled cultural and technological advancements while significantly altering ecosystems and the carbon cycle, said Zhao Debo, the study's corresponding author. The discovery suggests that human impact on climate and vegetation commenced far earlier than current climate models recognize., Fire is a pivotal aspect of human involvement in the carbon cycle. However, the precise timing of the large-scale human fire use remains uncertain. Here, we report a pyrogenic carbon record of East Asian fire history over the past 300,000 y from the East China Sea. This record suggests a rapid increase in fire activity since approximately 50,000 y ago, indicating a decoupling from the monsoon , .