Climatic changes and alluvial-sedimentation settings in southeastern Transbaikalia in the Middle-Late Holocene ( by the example of the Ilya floodplain )
V.B. Bazarovaa, L.M. Mokhova a , M.A. Klimin b , L.A. Orlova c , K.Yu. Bazarov a
a Pacific Institute of Geography, Far Eastern Branch of the RAS, 7 ul. Radio, Vladivostok, 690041 Russia
b Institute of Water and Ecological Problems, Far Eastern Branch of the RAS, 65 ul. Kim Yu Chena, Khabarovsk, 680000 Russia
c Institute of Geology and Mineralogy, Siberian Branch of the RAS, 3 prosp. Akad. Koptyuga, Novosibirsk, 630090 Russia
Keywords: Floodplain deposits; aridization; sedimentation; Middle-Late Holocene; southeastern Transbaikalia
Pages: 978-985
Abstract
Climatic changes in southeastern Transbaikalia in the Middle and Late Holocene and their influence on alluvial sedimentation environments are reconstructed from the results of study of the Ilya floodplain sediments (Alkhanai National Park). At the beginning of the Subboreal period, the regional climate became more arid, which led to a significant increase in steppe species communities in the landscapes. Intense climate aridization also took place at the beginning and at the end of the Subatlantic period of the Holocene. The alluvial-sedimentation rate increased during the weakening of aridization and decreased during cooling and the intensification of aridization. The obtained regional data are compared with data on the adjacent areas and the global climatic changes in the Northern Hemisphere.
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