Figure (IMAGE) Science China Press Caption The δ18O (A), CO2 concentration (B), dust particle (C) and DFe (D) concentrations over the past 110 kyr B.P.. The red stars represent the ice samples for this study. The data of δ18O, dust particle and DFe from NEEM ice core, CO2 data from Antarctic EDC ice core. Credit ©Science China Press Usage Restrictions Use with credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.