气候变化领域集成服务门户(CCPortal): Glacially sourced dust as a potentially significant source of ice nucleating particles

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DOI	10.1038/s41561-019-0314-x
	Glacially sourced dust as a potentially significant source of ice nucleating particles
	Tobo Y.; Adachi K.; DeMott P.J.; Hill T.C.J.; Hamilton D.S.; Mahowald N.M.; Nagatsuka N.; Ohata S.; Uetake J.; Kondo Y.; Koike M.
发表日期	2019
ISSN	17520894
EISSN	1752-0908
页码	253-+
英文摘要	Aeolian dusts serve as ice nucleating particles in mixed-phase clouds, and thereby alter the cloud properties and lifetime. Glacial outwash plains are thought to be a major dust source in cold, high latitudes. Due to the recent rapid and widespread retreat of glaciers, high-latitude dust emissions are projected to increase, especially in the Arctic region, which is highly sensitive to climate change. However, the potential contribution of high-latitude dusts to ice nucleation in Arctic low-level clouds is not well acknowledged. Here we show that glacial outwash sediments in Svalbard (a proxy for glacially sourced dusts) have a remarkably high ice nucleating ability under conditions relevant for mixed-phase cloud formation, as compared with typical mineral dusts. The high ice nucleating ability of the sediments is probably governed by the presence of small amounts of organic matter (<1 wt% organic carbon) rather than mineral components. In addition, our results from intensive field measurements and model simulations indicate that the concentrations of atmospheric ice nucleating particles over the Svalbard region are expected to be enhanced in the summertime under the influence of dust emissions from Svalbard and its surroundings. We suggest that high-latitude dust sources have the potential to significantly influence glaciation of Arctic low-level clouds. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
WOS研究方向	Geology
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/95963
作者单位	National Institute of Polar Research, Tachikawa, Tokyo, Japan; Department of Polar Science, School of Multidisciplinary Sciences, SOKENDAI (The Graduate University for Advanced Studies), Tachikawa, Tokyo, Japan; Atmospheric Environment and Applied Meteorology Research Department, Meteorological Research Institute, Tsukuba, Ibaraki, Japan; Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States; Department of Earth and Atmospheric Sciences, Cornell University, Ithaca, NY, United States; Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo, Tokyo, Japan; Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, Aichi, Japan; Institute for Advanced Research, Nagoya University, Nagoya, Aichi, Japan
推荐引用方式 GB/T 7714	Tobo Y.,Adachi K.,DeMott P.J.,et al. Glacially sourced dust as a potentially significant source of ice nucleating particles[J],2019:253-+.
APA	Tobo Y..,Adachi K..,DeMott P.J..,Hill T.C.J..,Hamilton D.S..,...&Koike M..(2019).Glacially sourced dust as a potentially significant source of ice nucleating particles.Nature Geoscience,253-+.
MLA	Tobo Y.,et al."Glacially sourced dust as a potentially significant source of ice nucleating particles".Nature Geoscience (2019):253-+.