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Mega‐pulses and megacycles in East Asian monsoon variations recorded in Chinese loess‐red clay magnetic susceptibility
Author(s) -
Xiong Shangfa,
Jiang Wenying,
Liu Tungsheng
Publication year - 2006
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 - 10.1029/2006gl027842
Subject(s) - loess , geology , monsoon , loess plateau , east asian monsoon , plateau (mathematics) , east asia , diachronous , climatology , paleontology , tectonics , china , soil science , mathematical analysis , mathematics , law , political science
Three mega‐pulses (first order variations) and four megacycles (second order variations) in loess‐red clay magnetic susceptibility are identified in a loess section in the central Chinese Loess Plateau, implying pulsed fluctuations in East Asian monsoon intensity on tectonic timescales. Comparisons of the loess record with the mineral flux from ODP Site 758 and the diatom record in Lake Baikal core BDP‐98 suggests that the loess‐red clay magnetic susceptibility may represent a continental‐scale signal of climate change. It is apparent that the stepwise‐diachronous rise of the Tibetan Plateau and its resulting climatic influence may be the main cause of the observed monsoon pulses.