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深海沉积物剖面中CaCO_3含量变化与气候变迁密切相关,冰期时的高,间冰期时的低。若大陆上黄土地层中CaCO_3含量变化也有类似的性质,就更有利于气候长期变迁的海—陆对比以及探讨气候变迁的原因。本文根据陕西洛川黄土地层剖面中110多块样品的分析资料,用相关分析和方差分析,考察CaCO_3含量与黄土、古土壤形成环境的关系,并用频谱分析初步探讨约70万年来气候变迁的周期以及气候变迁的海—陆对比等问题。
The change of CaCO_3 content in the deep-sea sediment profile is closely related to climate change, high during glacial period and low during inter-glacial period. If the content of CaCO_3 in the loess strata in the mainland also has similar characteristics, it is more conducive to the sea-land contrast of the long-term climate change and the reasons for the climate change. Based on the analysis data of more than 110 samples from the loess stratum in Luochuan, Shaanxi Province, correlation analysis and analysis of variance were used to investigate the relationship between CaCO 3 content and the formation of loess and paleosol. The spectrum analysis was used to investigate the period of climate change about 700000 years As well as the sea-land contrast of climate change and other issues.