Long-term climato-limnological cycles found in a 3.5-million-year continental record
作者： Kenji Kashiwaya , Hideo Sakai , Masayuki Ryugo , Masae Horii , Takayoshi Kawai
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摘要: Analysis of physical properties in long sediment cores (BDP96) from Academician Ridge Lake Baikal indicates that major climato-limnological changes during the past 3.5 Myr occurred at about 2.5–2.8, 1.7–1.9, and 0.9–1.2 Ma, which were close to times geomagnetic polarity reversals (Matuyama/Gauss, Olduvai, Jaramillo + Matuyama/Brunhes). The principal oscillation has a long-term period nearly 1,000 kyr, corresponds periodicity fluctuation solar insolation. It also seems be related field intensity. Other 400 kyr Milankovitch parameters eccentricity. These results suggest insolation closely environmental variations deep continental interior.
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