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Periodic variations of grain size in Pleistocene sediments in Lake Biwa and Earth‐orbital cycles
Author(s) -
Yamamoto Atsuyuki,
Kashiwaya Kenji,
Fukuyama Kaoru
Publication year - 1985
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl012i009p00585
Subject(s) - milankovitch cycles , geology , pleistocene , insolation , paleoclimatology , northern hemisphere , grain size , southern hemisphere , sima , variation (astronomy) , paleontology , oceanography , climatology , climate change , geomorphology , glacial period , physics , astrophysics
A time sequence of grain size distributions from the Pleistocene sediments in Lake Biwa, located in the central part of Japan (35° N, 136° E), has dominant periodicities of 41,000, 23,000, and 19,000 years which are very close to those predicted from the astronomical theory of paleoclimate introduced by Milankovitch. The time variation of the grain size is very similar to that of insolation of caloric summer in the Northern Hemisphere.