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- W2372029400 abstract "The astronomical theory of climate has provided a very powerful means for developing accurate time-scales. Using orbital tuning methods, a millennial-resolution time scale of Dacan-1 core is established over the past 2'85 Ma for a 3200-meter-long logging curve of lake sediments in the Qaidam Basin, Western China. By analyzing multi-dimension spectra and singular spectrum of the logging curve and other climatic records from deep-sea ((δ~(18)O) curve of ODP677, ODP659?ODP758 sites and ice volume simulated curve) and Chinese loess deposits (grain size of the Baoji loess-soil sequence), a significant difference of periodic features is found between the Qaidam record and the deep-sea, the loess deposits. The climatic change reflected in the time-domain spectrum of the Qaidam record lagged those in the deep-sea and loess deposits by 3～4 ka. Furthermore, frequency-domain analyses and combination of singular spectrum illustrate that the signal of processional domain in the Qaidam record stronger than that in other deep-sea and loess records. This suggests that long-term climate change in the basin has been strongly influenced by variation of the processional-scale orbital insolation, as previously discovered in the low-latitude climatic regime. Deep-sea records and loess records have been strongly influenced by obliquity cycle change. It is pointed that the processional cycles in the logging curve over the past 2'85 Ma are quite different from those in deep-sea and loess deposits." @default.
- W2372029400 created "2016-06-24" @default.
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- W2372029400 date "2004-01-01" @default.
- W2372029400 modified "2023-09-23" @default.
- W2372029400 title "Paleoclimatic Change Derived from Natural Gamma-Logging Curve in Qaidam Basin and Its Relation to the Solar Insolation" @default.
- W2372029400 hasPublicationYear "2004" @default.
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