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 SCIE SCOPUS

Cited 18 time in WEB OF SCIENCE Cited 24 time in Scopus
Title
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
Author(s)
Seo, Inah; Lee, Yong Il; Yoo, Chan Min; Kim, Hyung Jeek; Hyeong, Kiseong
KIOST Author(s)
Yoo, Chan Min(유찬민)Kim, Hyung Jeek(김형직)Hyeong, Kiseong(형기성)
Publication Year
2014-10
Abstract
Dust transport to the tropical/subtropical northwestern Pacific over the past 600 kyr was investigated using radiogenic isotopes (Sr-87/Sr-86 and eNd), together with the clay mineral composition, of eolian dust preserved in a sediment core obtained from the Philippine Sea (12 degrees 30'N, 134 degrees 60'E). These data revealed the influence of two prevailing dust sources, namely, the Asian deserts and nearby volcanic arcs (e.g., the Luzon Arc), with average contributions of around 70% and 30%, respectively, from each. The clay mineral composition of the core resembled dust from the central Asian deserts (CADs; e. g., the Taklimakan Desert) as in the north-central Pacific, but published aerosol data collected near the study site during winter/spring have the mineralogical signature of dust originating from the East Asian deserts (EADs). These data indicate that the relative contribution of EAD dust increases with the northeasterly surface winds associated with the East Asian Winter Monsoon (EAWM) during winter/spring, but the Prevailing Westerlies and Trade Winds that carry dust from the CADs is the dominant transport agent in the overall dust budget of the study site. The results of this study contradict the prevailing view that direct dust transport by the EAWM winds in spring dominates the annual flux of eolian dust in the northwest Pacific.
ISSN
0148-0227
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/2693
DOI
10.1002/2014JD022025
Bibliographic Citation
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, v.119, no.19, pp.11492 - 11504, 2014
Publisher
AMER GEOPHYSICAL UNION
Type
Article
Language
English
Document Type
Article
Publisher
AMER GEOPHYSICAL UNION
Related Researcher
Research Interests

Particle flux,Carbon cycle,Climate Change,입자 플럭스,탄소순환,기후변화

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