Geochemically Defined Mean Position of the Intertropical Convergence Zone in the Central Pacific SCIE SCOPUS

Cited 2 time in WEB OF SCIENCE Cited 3 time in Scopus
Title
Geochemically Defined Mean Position of the Intertropical Convergence Zone in the Central Pacific
Author(s)
Seo, Inah; Kim, Mun Gi; Yoo, Chan Min; Hyeong, Ki Seong
KIOST Author(s)
Yoo, Chan Min(유찬민)Hyeong, Ki Seong(형기성)
Alternative Author(s)
유찬민; 형기성
Publication Year
2021-10
Abstract
The Intertropical Convergence Zone (ITCZ) is a band of vigorous convection and high precipitation formed by the confluence of southeasterly and northeasterly trade winds, and acts as a barrier to cross-equatorial dust transport. We investigate the provenance of dust in the surface sediments of 16 cores collected along a 131.5 degrees W transect from the equator to 16 degrees N in the central Pacific. The results reveal well-defined Asian dust signals north of 7 degrees N and mixed Asian-South American source signals south of 6 degrees N. We propose the southernmost latitude with an intact Asian source signal (7 degrees N) as the present-day mean ITCZ position in terms of dust provenance in the central Pacific. This geochemically defined mean ITCZ position reflects differences in thermal and dust fluxes between hemispheres and can be used as a reference for quantitatively assessing ITCZ displacement in the sedimentary down-core records back to ca. 14 Ma.
ISSN
0094-8276
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/42146
DOI
10.1029/2021GL094432
Bibliographic Citation
GEOPHYSICAL RESEARCH LETTERS, v.48, no.19, 2021
Publisher
AMER GEOPHYSICAL UNION
Keywords
Intertropical Convergence Zone; eolian dust; neodymium isotopes; rare earth elements; elemental composition; sediment provenance
Type
Article
Language
English
Document Type
Article
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