干旱区生态环境知识资源中心(Arid): Variations in mineralogy of dust in an ice core obtained from northwestern Greenland over the past 100 years

Arid

DOI	10.5194/cp-17-1341-2021
	Variations in mineralogy of dust in an ice core obtained from northwestern Greenland over the past 100 years
	Nagatsuka, Naoko; Goto-Azuma, Kumiko; Tsushima, Akane; Fujita, Koji; Matoba, Sumito; Onuma, Yukihiko; Dallmayr, Remi; Kadota, Moe; Hirabayashi, Motohiro; Ogata, Jun; Ogawa-Tsukagawa, Yoshimi; Kitamura, Kyotaro; Minowa, Masahiro; Komuro, Yuki; Motoyama, Hideaki; Aoki, Teruo
通讯作者	Nagatsuka, N (corresponding author), Natl Inst Polar Res, Tokyo 1908518, Japan.
来源期刊	CLIMATE OF THE PAST
ISSN	1814-9324
EISSN	1814-9332
出版年	2021
卷号	17 期号:3 页码:1341-1362
英文摘要	Our study is the first to demonstrate a high-temporal-resolution record of mineral composition in a Greenland ice core over the past 100 years. To reconstruct past variations in the sources and transportation processes of mineral dust in northwestern Greenland, we analysed the morphology and mineralogical composition of dust in the SIGMA-D ice core from 1915 to 2013 using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). The results revealed that the ice core dust consisted mainly of silicate minerals and that the composition varied substantially on multi-decadal and inter-decadal scales, suggesting that the ice core minerals originated from different geological sources in different periods during the past 100 years. The multi-decadal variation trend differed among mineral types. Kaolinite, which generally formed in warm and humid climatic zones, was abundant in colder periods (1950-2004), whereas mica, chlorite, feldspars, mafic minerals, and quartz, which formed in arid, high-latitude, and local areas, were abundant in warmer periods (1915-1949 and 2005-2013). Comparison to Greenland surface temperature records indicates that multi-decadal variation in the relative abundance of these minerals was likely affected by local temperature changes in Greenland. Trajectory analysis shows that the minerals were transported mainly from the western coast of Greenland in the two warming periods, which was likely due to an increase in dust sourced from local icefree areas as a result of shorter snow/ice cover duration in the Greenland coastal region during the melt season caused by recent warming. Meanwhile, ancient deposits in northern Canada, which were formed in past warmer climates, seem to be the best candidate during the colder period (1950-2004). Our results suggest that SEM-EDS analysis can detect variations in ice core dust sources during recent periods of low dust concentration.
类型	Article
语种	英语
开放获取类型	gold, Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000665504500002
WOS关键词	MODEL INTERCOMPARISON PROJECT ; SIZE DISTRIBUTION ; CLAY-MINERALS ; LAND-SURFACE ; SOUTH-POLE ; SOIL DUST ; CLIMATE ; SUMMIT ; SNOW ; TRACERS
WOS类目	Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
WOS研究方向	Geology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368018
作者单位	[Nagatsuka, Naoko; Goto-Azuma, Kumiko; Hirabayashi, Motohiro; Ogata, Jun; Ogawa-Tsukagawa, Yoshimi; Kitamura, Kyotaro; Komuro, Yuki; Motoyama, Hideaki; Aoki, Teruo] Natl Inst Polar Res, Tokyo 1908518, Japan; [Goto-Azuma, Kumiko; Motoyama, Hideaki; Aoki, Teruo] Grad Univ Adv Studies, Dept Polar Sci, SOKENDAI, Tokyo 1908518, Japan; [Tsushima, Akane] Chiba Univ, Grad Sch Sci, Kashiwa, Chiba 2770882, Japan; [Fujita, Koji; Minowa, Masahiro] Nagoya Univ, Grad Sch Environm Studies, Nagoya, Aichi 4648601, Japan; [Matoba, Sumito; Kadota, Moe] Hokkaido Univ, Inst Low Temp Sci, Sapporo, Hokkaido 0600819, Japan; [Onuma, Yukihiko] Univ Tokyo, Inst Ind Sci, Kashiwa, Chiba 2778574, Japan; [Dallmayr, Remi] Alfred Wegener Inst, Alten Hafen 26, D-27568 Bremerhaven, Germany; [Kadota, Moe] Hokkaido Univ, Grad Sch Environm Sci, Sapporo, Hokkaido 0600810, Japan
推荐引用方式 GB/T 7714	Nagatsuka, Naoko,Goto-Azuma, Kumiko,Tsushima, Akane,et al. Variations in mineralogy of dust in an ice core obtained from northwestern Greenland over the past 100 years[J],2021,17(3):1341-1362.
APA	Nagatsuka, Naoko.,Goto-Azuma, Kumiko.,Tsushima, Akane.,Fujita, Koji.,Matoba, Sumito.,...&Aoki, Teruo.(2021).Variations in mineralogy of dust in an ice core obtained from northwestern Greenland over the past 100 years.CLIMATE OF THE PAST,17(3),1341-1362.
MLA	Nagatsuka, Naoko,et al."Variations in mineralogy of dust in an ice core obtained from northwestern Greenland over the past 100 years".CLIMATE OF THE PAST 17.3(2021):1341-1362.