Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001pabei..19..445y&link_type=abstract
Progress in Astronomy, Vol. 19, No. 4, p. 445 - 456 (2001)
Astronomy and Astrophysics
Astronomy
Milankovitch Astronomical Theory Of Paleoclimate, Quaternary Glacial Epoch, Climatic Changes
Scientific paper
The recent progress on studies of the Quaternary glacial-interglacial epoch which relates to the Milankovitch astronomical theory of paleoclimate is presented. The different large glacial-interglacial changes with cycles of 100 - 120, ≍40 and 20 thousands years are found in the data of global ice volume, which is implied by the data of oxygen isotope ratio in the deep sea. The similar period terms above in glacial-interglacial climate changes are also documented by complementary climate records derived from different data of geology, such as the deep sea sediments, the records of polar ice core's δ18O from Vostok and the central Greenland, the magnetic susceptibility data of loess profile in China and so on. According to the Milankovitch astronomical theory of paleoclimate, the varitions in the geometry of the Earth's orbital elements are the fundamental source of the succession of Quaternary ice age. Hence, it is the global effect that caused by the climatic variations. Milankovitch astronomical theory of paleoclimate is basically reliable. However, the deficiency in this theory and the possible external mechanism of the glacial-interglacial changes with cycles of 100 - 120 thousands years are introduced and discussed.
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