Major metallic elements (Al, Ca, and Fe) and size distribution of mineral particles in recent snow in inland Northeast Greenland

被引：0

作者：

Komuro, Yuki ^{[1
,2
]}

Nakazawa, Fumio ^{[1
,3
]}

Goto-azuma, Kumiko ^{[1
,3
]}

Hirabayashi, Motohiro ^{[1
]}

Shigeyama, Wataru ^{[3
]}

Fujita, Koji ^{[4
]}

Steffensen, Jorgen Peder ^{[5
]}

Dahl-jensen, Dorthe ^{[5
]}

机构：

[1] Natl Inst Polar Res, 10-3 Midori Cho, Tachikawa, Tokyo 1908518, Japan

[2] Lab Environm Res Mt Fuji, Shinjuku Ku, 2-5-5 Okubo, Tokyo 1690072, Japan

[3] Grad Univ Adv Studies SOKENDAI, Tachikawa, Tokyo 1908518, Japan

[4] Nagoya Univ, Grad Sch Environm Studies, Furo Cho,Chikusa Ku, Nagoya 4648601, Japan

[5] Univ Copenhagen, Niels Bohr Inst, Phys Ice Climate & Earth, Tagensvej 16, Copenhagen, Denmark

来源：

BULLETIN OF GLACIOLOGICAL RESEARCH | 2024年 / 42卷

关键词：

Greenland; Snow pit; Mineral particles; Metallic element; Size distribution; ICE CORE; DUST;

D O I：

10.5331/bgr.24A02

中图分类号：

P9 [自然地理学];

学科分类号：

0705 ; 070501 ;

摘要：

Rising temperatures and melting of snow and ice since 2000 CE may result in coastal soil regions in Greenland providing more mineral particles to the Greenland ice sheet than before. To examine seasonal variations of the concentrations and source regions of mineral particles in recent snow in inland Northeast Greenland, we analyzed the total (i.e., soluble and insoluble) concentrations of major metallic elements (Al. Ca, and Fe) and the size distributions of mineral particles in snow pit samples covering 2013-2017 at the East Greenland Ice Core Project site. The total concentrations of metallic elements showed clear seasonality with spring maxima, indicating that the mineral particle concentrations peaked in this season. Volcanic products from the 2014-2015 eruptions of B & aacute;r & eth;arbunga, Iceland, had little effect on the metallic element concentrations. The increased Ca/Al ratio, Ca solubility, and fine particle fraction (<= 5 mu m) in winter-spring indicated that the relative contributions of mineral particles originating from distant arid regions increased in those seasons. In summer-autumn, the Ca/Al ratio and Ca solubility decreased, and the coarse particle fraction (>5 mu m) increased, suggesting that the relative contributions from coastal soil regions in Greenland increased in those seasons.

引用

页码：49 / 60

页数：12