气候变化领域集成服务门户(CCPortal): Compositions of Dust and Sea Salts in the Dome C and Dome Fuji Ice Cores From Last Glacial Maximum to Early Holocene Based on Ice-Sublimation and Single-Particle Measurements

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DOI	10.1029/2019JD032208
	Compositions of Dust and Sea Salts in the Dome C and Dome Fuji Ice Cores From Last Glacial Maximum to Early Holocene Based on Ice-Sublimation and Single-Particle Measurements
	Oyabu I.; Iizuka Y.; Kawamura K.; Wolff E.; Severi M.; Ohgaito R.; Abe-Ouchi A.; Hansson M.
发表日期	2020
ISSN	2169897X
卷号	125 期号:4
英文摘要	We analyzed the chemical compositions of dust and sea-salt particles in the EPICA Dome C (EDC) ice core during 26–7 kyr BP using an ice-sublimation technique and compared the results with existing data of the Dome Fuji (DF) ice core. Combined with ion concentration data, our data suggested similar sea-salt fluxes in both cores and significantly lower dust flux in the EDC core. The differences in modal size and aspect ratio of dust particles between the two cores support the dominance of Patagonian source suggested by earlier works. The compositions of calcic dust showed major change at ~17 kyr BP, possibly reflecting a relative increase in dust transported via the upper troposphere. The calcium sulfate fraction was higher in the DF core than in the EDC core after ~17 kyr BP, suggesting that higher Patagonian dust contribution to the DF region. Abundant NaCl particles were found in the DF core in comparison with the EDC core from the LGM to early Holocene, possibly because of the high concentration of terrestrial dust in the DF core that reduced acid availability for sea-salt modification. During the Holocene, the lower NaCl fraction and Cl−/Na+ ratio in the EDC core suggested that most Cl− was lost to the atmosphere from snow at Dome C, while it was preserved at Dome Fuji as NaCl and solid solution. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	aerosol; Antarctica; dust; ice core; microparticles; sea salt
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186164
作者单位	National Institute of Polar Research, Research Organization of Information and Systems, Tokyo, Japan; Institute of Low Temperature Science, Hokkaido University, Sapporo, Japan; Department of Physical Geography, Stockholm University, Stockholm, Sweden; Department of Polar Science, The Graduate University of Advanced Studies (SOKENDAI), Tokyo, Japan; Japan Agency for Marine Science and Technology (JAMSTEC), Yokosuka, Japan; Department of Earth Sciences, University of Cambridge, Cambridge, United Kingdom; Department of Chemistry “Ugo Schiff”, University of Florence, Florence, Italy; Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan; Atmosphere Ocean Research Institute, University of Tokyo, Kashiwa, Japan
推荐引用方式 GB/T 7714	Oyabu I.,Iizuka Y.,Kawamura K.,et al. Compositions of Dust and Sea Salts in the Dome C and Dome Fuji Ice Cores From Last Glacial Maximum to Early Holocene Based on Ice-Sublimation and Single-Particle Measurements[J],2020,125(4).
APA	Oyabu I..,Iizuka Y..,Kawamura K..,Wolff E..,Severi M..,...&Hansson M..(2020).Compositions of Dust and Sea Salts in the Dome C and Dome Fuji Ice Cores From Last Glacial Maximum to Early Holocene Based on Ice-Sublimation and Single-Particle Measurements.Journal of Geophysical Research: Atmospheres,125(4).
MLA	Oyabu I.,et al."Compositions of Dust and Sea Salts in the Dome C and Dome Fuji Ice Cores From Last Glacial Maximum to Early Holocene Based on Ice-Sublimation and Single-Particle Measurements".Journal of Geophysical Research: Atmospheres 125.4(2020).