북서태평양에 운반되는 광물입자의 기원지 및 황사의 운반기작에 관한 고찰

Title
북서태평양에 운반되는 광물입자의 기원지 및 황사의 운반기작에 관한 고찰
Alternative Title
Provenance of mineral dust delivered to the Northwest Pacific and its implication for the transport mechanism of Asian dust: Isotopic and Clay Mineralogical Evidence
Author(s)
서인아; 이용일; 형기성; 유찬민; 김형직
KIOST Author(s)
Hyeong, Kiseong(형기성)Yoo, Chan Min(유찬민)Kim, Hyung Jeek(김형직)
Publication Year
2015-11-12
Abstract
The arid and semi-arid regions in the Central-East Asia have supplied a tremendous amount of dust, namely Asian Dust, to nearby continent and the North Pacific Ocean. To date, most studies using pelagic eolian sediment 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. To characterize the provenance and transport pathways of the Asian Dust deposited in the western tropical/subtropical Pacific and to investigate its changes over the late Quaternary, source regions of mineral dust were investigated with the clay mineral assemblage and the 143Nd/144Nd and 87Sr/86Sr composition of the eolian fractions of deep-sea sediment core retrieved from the Palau-Kyushu Ridge (12°30′N, 134°60′E, 3,728 m water depth) in the Philippine Sea, deposited for the last 600 kyr. The analyzed attributes of the eolian sediment resemble those of dust from the Central Asian deserts (CADs e.g., Taklimakan and nearby deserts) 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 associc 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. To characterize the provenance and transport pathways of the Asian Dust deposited in the western tropical/subtropical Pacific and to investigate its changes over the late Quaternary, source regions of mineral dust were investigated with the clay mineral assemblage and the 143Nd/144Nd and 87Sr/86Sr composition of the eolian fractions of deep-sea sediment core retrieved from the Palau-Kyushu Ridge (12°30′N, 134°60′E, 3,728 m water depth) in the Philippine Sea, deposited for the last 600 kyr. The analyzed attributes of the eolian sediment resemble those of dust from the Central Asian deserts (CADs e.g., Taklimakan and nearby deserts) 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 associ
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/25072
Bibliographic Citation
International Conference on Asian Marine Geology, pp.1, 2015
Publisher
한국지질자원연구원/한국해양과학기술원
Type
Conference
Language
English
Publisher
한국지질자원연구원/한국해양과학기술원
Related Researcher
Research Interests

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

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