CCPortal
DOI10.5194/tc-13-1147-2019
Saharan dust events in the European Alps: Role in snowmelt and geochemical characterization
Di Mauro B.; Garzonio R.; Rossini M.; Filippa G.; Pogliotti P.; Galvagno M.; Morra Di Cella U.; Migliavacca M.; Baccolo G.; Clemenza M.; Delmonte B.; Maggi V.; Dumont M.; Tuzet F.; Lafaysse M.; Morin S.; Cremonese E.; Colombo R.
发表日期2019
ISSN19940416
EISSN13
起始页码1147
结束页码1165
卷号13期号:4
英文摘要The input of mineral dust from arid regions impacts snow optical properties. The induced albedo reduction generally alters the melting dynamics of the snowpack, resulting in earlier snowmelt. In this paper, we evaluate the impact of dust depositions on the melting dynamics of snowpack at a high-elevation site (2160 m) in the European Alps (Torgnon, Aosta Valley, Italy) during three hydrological years (2013-2016). These years were characterized by several Saharan dust events that deposited significant amounts of mineral dust in the European Alps. We quantify the shortening of the snow season due to dust deposition by comparing observed snow depths and those simulated with the Crocus model accounting, or not, for the impact of impurities. The model was run and tested using meteorological data from an automated weather station. We propose the use of repeated digital images for tracking dust deposition and resurfacing in the snowpack. The good agreement between model prediction and digital images allowed us to propose the use of an RGB index (i.e. snow darkening index - SDI) for monitoring dust on snow using images from a digital camera. We also present a geochemical characterization of dust reaching the Alpine chain during spring in 2014. Elements found in dust were classified as a function of their origin and compared with Saharan sources. A strong enrichment in Fe was observed in snow containing Saharan dust. In our case study, the comparison between modelling results and observations showed that impurities deposited in snow anticipated the disappearance of snow up to 38 d a out of a total 7 months of typical snow duration. This happened for the season 2015-2016 that was characterized by a strong dust deposition event. During the other seasons considered here (2013-2014 and 2014-2015), the snow melt-out date was 18 and 11 d earlier, respectively. We conclude that the effect of the Saharan dust is expected to reduce snow cover duration through the snow-albedo feedback. This process is known to have a series of further hydrological and phenological feedback effects that should be characterized in future research. © Author(s) 2019.
学科领域albedo; atmospheric deposition; climate variation; dust storm; geochemical survey; mineral dust; snow cover; snowmelt; snowpack; tracking; Alps; Italy; Valle d'Aosta; Crocus
语种英语
scopus关键词albedo; atmospheric deposition; climate variation; dust storm; geochemical survey; mineral dust; snow cover; snowmelt; snowpack; tracking; Alps; Italy; Valle d'Aosta; Crocus
来源期刊The Cryosphere
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/118897
作者单位Earth and Environmental Sciences Department, University of Milano-Bicocca, Milan, 20126, Italy; Environmental Protection Agency of Aosta Valley, Aosta, Italy; Max Planck Institute for Biogeochemistry, Jena, Germany; National Institute of Nuclear Physics (INFN), University of Milano-Bicocca, Milan, 20126, Italy; Department of Physics Giuseppe Occhialini, University of Milano-Bicocca, Milan, 20126, Italy; Université Grenoble Alpes, Université de Toulouse, Météo-France, CNRS, CNRM, Centre d'Etudes de la Neige, Grenoble, France; UGA/CNRS, Institut des Géosciences de l'Environnement (IGE), SaintMartin d'Hères, France
推荐引用方式
GB/T 7714
Di Mauro B.,Garzonio R.,Rossini M.,et al. Saharan dust events in the European Alps: Role in snowmelt and geochemical characterization[J],2019,13(4).
APA Di Mauro B..,Garzonio R..,Rossini M..,Filippa G..,Pogliotti P..,...&Colombo R..(2019).Saharan dust events in the European Alps: Role in snowmelt and geochemical characterization.The Cryosphere,13(4).
MLA Di Mauro B.,et al."Saharan dust events in the European Alps: Role in snowmelt and geochemical characterization".The Cryosphere 13.4(2019).
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Di Mauro B.]的文章
[Garzonio R.]的文章
[Rossini M.]的文章
百度学术
百度学术中相似的文章
[Di Mauro B.]的文章
[Garzonio R.]的文章
[Rossini M.]的文章
必应学术
必应学术中相似的文章
[Di Mauro B.]的文章
[Garzonio R.]的文章
[Rossini M.]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。