Multi-proxies studies of high-resolution loess-paleosoil sequences in the arid northwest Chinese Loess Plateau (CLP) are the key access to revealing the variation characteristics and driving mechanism of Asian monsoon in orbital-suborbital timescale.However,few comparison and sensitivity analysis researches of the multi-proxies obtained from the same geological archive are available for us to refer to,which restricts us to better understand the characteristics and driving mechanism of rapid monsoon changes.In this study,we chose the upper 85 m of two parallel loess cores(35.630N,103.12°E) retrieved from Linxia City in Gansu Province to conduct high-resolution mean grain size,magnetic susceptibility (2-cm resolution) and geochemical elements scanning (1-cm resolution) analysis.Ten age control points are selected to match the loess/paleosol boundaries to the glacial/interglacial transitions to reconstruct chronosequence of Linxia loess core since the past 260 ka.Based on the analysis above,the results show that mean grain size and Zr/Rb exhibit significant glacial-interglacial fluctuations,matching well with marine isotope record over the last 260 ka and confirming the strong coupling between the winter monsoon and Northern Hemisphere ice volume.But mean grain size is relatively more sensitive than Zr/Rb in millennial timescales.Rb/Sr ratio and magnetic susceptibility can well document glacial-interglacial variations of summer monsoon.Nevertheless,summer monsoon can be more elaborately recorded by Rb/Sr ratio.The Aisa monsoon implied by mean grain size,Zr/Rb and Rb/Sr ratios exhibits obvious precessional signal,corresponding well with summer insolation at 65°N and speleothem delta~(18)O of Sanbao-Hulu caves,manifesting that summer solar insolation is one of the forcing factors of East Asian monsoon fluctuations.Compared with speleothem curve,mean grain size,Zr/Rb and Rb/Sr ratios can detect the same order of magnitude warm events during the last two glacial cycles.But the number of warm events recorded by mean grain sizes is more than that by Zr/Rb and Rb/Sr ratios,which can not be well correlated with each other.Significantly cooling Heinrich events implied by mean grain size and Zr/Rb ratio are well associated with obviously weakening events of summer monsoon recorded by speleothem.But the frequencies of cooling events are higher than that of marine records.Mismatches of abrupt climate changes in the various proxies are mainly caused by the sensitivity discrepancy among different indicators.In the future,we should conduct more high-resolution and sensitive loess proxies research to help us to better understand the characteristics (such as timing and amplitude) and to analyze the temporal and spatial discrepancy of rapid monsoon changes.