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Snow moving to higher elevations: Analyzing three decades of snowline dynamics in the Alps

Hu, Zhongyang and Dietz, Andreas and Zhao, Alcide and Uereyen, Soner and Zhang, He and Wang, Michael and Mederer, Peter and Kuenzer, Claudia (2020) Snow moving to higher elevations: Analyzing three decades of snowline dynamics in the Alps. Geophysical Research Letters, 47, pp. 1-11. Wiley. DOI: 10.1029/2019GL085742 ISSN 0094-8276

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Official URL: https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2019GL085742

Abstract

In the Alps, snow cover dynamics can be monitored using Earth observation (EO). However, low revisit frequency and cloud cover pose a challenge to long‐term time series analysis using high spatial resolution EO images. In this study, we applied the random forest regression to model regional snowline elevations (RSEs). In this manner, daily snowline dynamics and their long‐term trends can be derived, despite the aforementioned challenges. Of the six investigated Alpine catchments between 1984 and 2018, a significant increasing trend of RSEs is shown in four catchments in the early ablation seasons (between 5.38 ± 2.64 and 11.29 ± 4.79 m·a−1) and five catchments in the middle ablation seasons (between 4.17 ± 2.62 and 8.76 ± 4.42 m·a−1). On average, the random forest regression models can explain 75% of the RSE variations. Furthermore, air temperature was found influential in snow persistence especially during middle and late ablation seasons.

Item URL in elib:https://elib.dlr.de/135406/
Document Type:Article
Title:Snow moving to higher elevations: Analyzing three decades of snowline dynamics in the Alps
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Hu, ZhongyangZhongyang.Hu (at) dlr.deUNSPECIFIED
Dietz, Andreasandreas.dietz (at) dlr.deUNSPECIFIED
Zhao, AlcideSchool of GeoSciences, University of Edinburgh, Edinburgh, UKUNSPECIFIED
Uereyen, Sonersoner.uereyen (at) dlr.dehttps://orcid.org/0000-0003-3733-0049
Zhang, HeCollege of Engineering, Mathematics and Physical Sciences, University Exeter, Exeter, UK, ofUNSPECIFIED
Wang, MichaelInstitute of Geography and Geology, University of Wuerzburg, Wuerzburg, GermanyUNSPECIFIED
Mederer, PeterPeter.Mederer (at) dlr.deUNSPECIFIED
Kuenzer, Claudiaclaudia.kuenzer (at) dlr.deUNSPECIFIED
Date:16 May 2020
Journal or Publication Title:Geophysical Research Letters
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:47
DOI :10.1029/2019GL085742
Page Range:pp. 1-11
Publisher:Wiley
ISSN:0094-8276
Status:Published
Keywords:Snow Cover, Alps, Snow line, climate change, Landsat, time series
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Remote sensing and geoscience
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Land Surface Dynamics
Deposited By: Dietz, Andreas
Deposited On:21 Jul 2020 11:06
Last Modified:21 Jul 2020 11:06

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