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Deriving Regional Snow Line Dynamics during the Ablation Seasons 1984-2018 in the Mid-latitude European Mountains

Hu, Zhongyang and Dietz, Andreas and Künzer, Claudia (2019) Deriving Regional Snow Line Dynamics during the Ablation Seasons 1984-2018 in the Mid-latitude European Mountains. Remote Sensing, 11 (933), pp. 1-21. Multidisciplinary Digital Publishing Institute (MDPI). DOI: 10.3390/rs11080933 ISSN 2072-4292

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Official URL: https://www.mdpi.com/2072-4292/11/8/933

Abstract

Snowmelt in the mid-latitude European mountains is undergoing significant spatiotemporal changes. Regional snow line elevation (RSLE) is an appropriate indicator for assessing snow cover variations in mountain areas. To derive regional snow line dynamics during the ablation seasons 1984–2018, the present study unprecedentedly introduced a readily applicable framework. The framework constitutes four steps: atmospheric and topographic correction, snow classification, RSLE retrieval, and regional snow line retreat curve (RSLRC) derivation. The developed framework has been successfully applied to 8641 satellite images acquired by Landsat, ASTER, and Sentinel-2. The results of the intra-annual regional snow line variations show that: (1) regional snow lines in the Alpine catchments preserve the longest; (2) RSLEs are lower in the northern Pyrenees than in the southern part; (3) regional snow lines persist the shortest in the Carpathian catchments; and (4) during the end of the ablation season 2018, intermediate snowfall events in the catchments Adda, Tagliamento, and Uzh are observed. In terms of the long-term inter-annual variations, significantly accelerating snow line recession is detected in the northern Pyrenean catchment Ariege. In the Alpine catchment Alpenrhein and Drac, RSLRCs are shifting towards lower accumulated air-temperature (AT) significantly, with the magnitude of −3.77 °C·a−1 (Alpenrhein) and −3.99 °C·a−1 (Drac).

Item URL in elib:https://elib.dlr.de/127420/
Document Type:Article
Title:Deriving Regional Snow Line Dynamics during the Ablation Seasons 1984-2018 in the Mid-latitude European Mountains
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hu, ZhongyangZhongyang.Hu (at) dlr.deUNSPECIFIED
Dietz, AndreasAndreas.Dietz (at) dlr.deUNSPECIFIED
Künzer, ClaudiaClaudia.Kuenzer (at) dlr.deUNSPECIFIED
Date:April 2019
Journal or Publication Title:Remote Sensing
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:No
Volume:11
DOI :10.3390/rs11080933
Page Range:pp. 1-21
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
ISSN:2072-4292
Status:Published
Keywords:snow line dynamics; European mountains; ablation season; regional snow line elevation (RSLE); regional snow line retreat curves (RSLRCs); M-estimation; Landsat; ASTER; Sentinel-2; 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 May 2019 09:36
Last Modified:21 Sep 2019 05:06

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