Sr‐Nd isotope composition and clay mineral assemblages in eolian dust from the central Philippine Sea over the last 600 kyr: Implications for the transport mechanism of Asian dust

• DOI: 10.1002/2014jd022025
• Publication Date: 2014-09-12T23:57:45Z
• Authors: Inah Seo; Yong Il Lee; Chan Min Yoo; Hyung Jeek Kim; Kiseong Hyeong
• Keywords: Mineral dust; Asian Dust; Westerlies; Deposition; Marine isotope stage

Abstract Dust transport to the tropical/subtropical northwestern Pacific over past 600 kyr was investigated using radiogenic isotopes ( 87 Sr/ 86 Sr and ε Nd ), together with clay mineral composition, of eolian dust preserved in a sediment core obtained from Philippine Sea (12°30′N, 134°60′E). These data revealed influence two prevailing sources, namely, Asian deserts nearby volcanic arcs (e.g., Luzon Arc), average contributions around 70% 30%, respectively, each. The composition resembled central (CADs; e.g., Taklimakan Desert) as north‐central Pacific, but published aerosol collected near study site during winter/spring have mineralogical signature originating East (EADs). indicate that relative contribution EAD increases northeasterly surface winds associated Winter Monsoon (EAWM) winter/spring, Prevailing Westerlies Trade Winds carry CADs is dominant agent overall budget site. results this contradict view direct by EAWM spring dominates annual flux northwest Pacific.