Provenance of Asian Dust Delivered to the Philippine Sea and Its Transport Pathways: Isotopic and Mineralogical Evidences

DC Field Value Language
dc.contributor.author 서인아 -
dc.contributor.author 이용일 -
dc.contributor.author 유찬민 -
dc.contributor.author 김형직 -
dc.contributor.author 형기성 -
dc.date.accessioned 2020-07-16T01:53:39Z -
dc.date.available 2020-07-16T01:53:39Z -
dc.date.created 2020-02-11 -
dc.date.issued 2014-12-31 -
dc.identifier.uri https://sciwatch.kiost.ac.kr/handle/2020.kiost/25685 -
dc.description.abstract Most dust studies using deep-sea sediment archives from the North Pacific have focused on understanding the mass flux variation of Asian dust in terms of long-term climate variability, but have not considered specific transport pathways or dust source regions (e.g., central/East Asian deserts versus northern Chinese deserts). To characterize the provenance and transport pathways of eolian dust deposited in the western tropical/subtropical Pacific, and to investigate changes over the late Quaternary, we used the clay mineral assemblage, together with the 143Nd/144Nd and 87Sr/86Sr composition of the inorganic silicate fractions of a deep-sea sediment core retrieved from the Palau-Kyushu Ridge in the Philippine Sea. The analyzed attributes of the core resemble those of 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 has the mineralogical signature of dust originating from the East Asian deserts (EADs e.g., the Chinese Loess Plateau and nearby deserts). 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 have been the dominant transport agent for the last 600 kyr. The results of thidust source regions (e.g., central/East Asian deserts versus northern Chinese deserts). To characterize the provenance and transport pathways of eolian dust deposited in the western tropical/subtropical Pacific, and to investigate changes over the late Quaternary, we used the clay mineral assemblage, together with the 143Nd/144Nd and 87Sr/86Sr composition of the inorganic silicate fractions of a deep-sea sediment core retrieved from the Palau-Kyushu Ridge in the Philippine Sea. The analyzed attributes of the core resemble those of 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 has the mineralogical signature of dust originating from the East Asian deserts (EADs e.g., the Chinese Loess Plateau and nearby deserts). 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 have been the dominant transport agent for the last 600 kyr. The results of thi -
dc.description.uri 1 -
dc.language English -
dc.publisher American Geophysical Union -
dc.relation.isPartOf AGU Fall Meeting -
dc.title Provenance of Asian Dust Delivered to the Philippine Sea and Its Transport Pathways: Isotopic and Mineralogical Evidences -
dc.type Conference -
dc.citation.conferencePlace US -
dc.citation.endPage 1 -
dc.citation.startPage 1 -
dc.citation.title AGU Fall Meeting -
dc.identifier.bibliographicCitation AGU Fall Meeting, pp.1 -
dc.description.journalClass 1 -
Appears in Collections:
Marine Resources Research Division > Global Ocean Research Center > 2. Conference Papers
Marine Resources Research Division > Deep-sea Mineral Resources Research Center > 2. Conference Papers
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