The elemental carbon record in Weinan loess section since the last 21 ka |
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Authors: | Ying Yang Chengde Shen Weixi Yi Yanmin Sun Dongsheng Liu |
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Institution: | (1) Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 510640 Guangzhou, China;(2) Xi’an State Key Laboratory of Loess and Quaternary Geology, Chinese Academy of Sciences, 710061 Xi’an, China;(3) Institute of Geology and Geophysics Chinese Academy of Sciences, 100029 Beijing, China |
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Abstract: | We studied the records of elemental carbon (EC) of the last 21 ka in the Weinan loess section, Shanxi Province. The variations
of EC abundance and δ13CEC value along with depth (or age) were presented. There are four large peaks of EC abundance around the following years: 20.16
ka, 17.76 ka, 11.97 ka and 4.49 ka. Climatic situation was changed rapidly during these periods. The peaks around 11.97 ka
and 20.16 ka are particularly sharp, occurring over intervals of tens to hundreds of years, which could represent short-duration
intense events. δ13CEC values in the upper 4 m of the Weinan loess section vary between −11.71‰ and −21.34‰, which suggests that the vegetation
pattern of the last 21 ka on the Loess Plateau is C4-dominated grasses. |
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Keywords: | elemental carbon fire history Weinan loess section δ 13C paleoenvironment |
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