Dust-climate couplings over the past 800,000 years from the EPICA Dome C ice core

摘要: Dust can affect the radiative balance of atmosphere by absorbing or reflecting incoming solar radiation; it also be a source micronutrients, such as iron, to ocean. It has been suggested that production, transport and deposition dust is influenced climatic changes on glacial-interglacial timescales. Here we present high-resolution record aeolian from EPICA Dome C ice core in East Antarctica, which provides an undisturbed climate sequence over past eight cycles. We find there significant correlation between flux temperature records during glacial periods absent interglacial periods. Our data suggest increasingly correlated with Antarctic becomes colder. interpret this progressive coupling climates lower latitudes. Limited atmospheric time sources lifetime are main factors controlling high input. propose observed approximately 25-fold increase all attributed strengthening South American sources, together longer for particles upper troposphere resulting reduced hydrological cycle ages.