Periodicity of Holocene climatic variations in the Huguangyan Maar Lake |
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Authors: | Jiaqi Liu Houyuan Lü J Negendank J Mingram Xiangjun Luo Wenyuan Wang Guoqiang Chu |
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Institution: | (1) Institute of Geology and Geophysics, Chinese Academy of Sciences, 100029 Beijing, China;(2) GeoForschungsZentrum Potsdam, D-14473 Potsdam, Germany |
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Abstract: | There exist five primary periods of 2 930, 1 140, 490, 250 and 220 a in the Holocene climatic variations in the Huguangyan
Maar Lake, according to the energy-spectrum and filter analyses of high-resolution time sequences (10–15 a) of the sediment
dry density. The peak values of the three temperature-decreasing periods with the 2 930 a cycle occur at about 7 300, 4 250
and 1 200 Cal. aBP. There are 7–8 temperature-decreasing periods with the 1 140 a cycle, and the climate fluctuation range
is largest in the early Holocene, and reduces gradually in the middle and late Holocene. The millennial-scale climatic change
in the Holocene may adjust the global water cycle and the thermohaline circulation intensity through the harmonic tones of
the earth’s precession cycle, which in turn influences the global climate change. |
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Keywords: | Maar Lake Holocene climatic periodicity |
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