A Sediment Magnetic Record in the North Pacific Across the Mid-Pleistocene Transition and its Implication on Asian Dust Evolution

Eolian dust deposited in the North Pacific is an important archive of evolutionary history Asian interior source regions and climate system. Here, we present a ∼1 Myr sediment magnetic record from central to characterize eolian properties since middle Pleistocene. For studied sediments, components are mainly identified as biogenic magnetite detrital minerals (dust volcanic origins) based on coercivity analysis, microscopic observations, sedimentological information. The component characterized by high (>100 mT) shows long-term increase concentration Ma. In particular, considerable at ∼0.8–0.7 Ma compared inorganic silicate fraction, indicative mineral enrichment fraction. At same time, distribution also decreases, which can be attributed ferrimagnetic contribution. As sediments primarily wind-blown particles, such implies change materials after ∼0.8 Ma, could explained reorganization atmospheric circulation and/or regional aridification across mid-Pleistocene transition. property areas likely synchronized similarity trend signals.