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- W1972506324 abstract "Abstract. The spatio-temporal changes in trace gas emissions and burnt biomass by paleofires in Chinese Loess Plateau over the last two glacial cycles have been reconstructed using vegetation (C3/C4) specific fire emission factors and black carbon records in three loess-paleosol sections. Results show that the average mass emission rate (AMER) of total trace gases (TTG) and burnt biomass by fires (BBF) in glacial periods are 1~2 times higher than in interglacial periods, and they display a clear southward decrease during both glacial and interglacial periods. This pattern reflects the combined control on paleofire emissions by climate-induced fire regimes and succession of vegetation types. The substantial increases in TTG-AMER and BBF during the late Holocene relative to the middle-to-early Holocene at Lingtai and Weinan support existing conclusion that increased anthropogenic fire activities have occurred in Middle and Southern Plateau during late Holocene. To assess the influence of paleofires on soil carbon stocks, the ratios of BBF to above-ground net primary productivity (ANPP), estimated by magnetic susceptibility-based paleorainfall and paleotemperature reconstruction, were calculated. In the Northern Plateau, the BBF/ANPP ratios during glacial periods are nearly 90%, about 2~3 times higher than during interglacial periods, suggesting paleofires may be the overwhelming force modulating the cycling of terrestrial organic carbon in the region. However, in Middle and Southern Plateau, the large decrease in BBF/ANPP ratios to around 20% and 10% respectively during glacial and interglacial periods suggests that paleofires have had a minor impact on carbon storage in these areas during both glacial and interglacial periods." @default.
- W1972506324 created "2016-06-24" @default.
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- W1972506324 date "2011-05-06" @default.
- W1972506324 modified "2023-09-24" @default.
- W1972506324 title "Paleofires and the dynamics of carbon cycling in Chinese Loess Plateau over the last two glacial cycles" @default.
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- W1972506324 doi "https://doi.org/10.5194/bgd-8-4459-2011" @default.
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