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Potential of Satellite-derived long-term Snow Cover Dynamics for Alpine Drought Monitoring

Köhler, Jonas and Dietz, Andreas and Jacob, Alexander and Bertoldi, Giacomo and Marin, Carlo and Zellner, Peter James and Alasawedah, Mohammad Hussein and Haslinger, Klaus and Mayer, Konrad (2022) Potential of Satellite-derived long-term Snow Cover Dynamics for Alpine Drought Monitoring. International Mountain Conference 2022, 11.-15. Sep. 2022, Innsbruck, Österreich.

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In the context of the hydrological drought in Northern Italy in 2022, we analyzed current and past snow line elevation (SLE) dynamics in nine catchments in the southern Alps. The SLE time series ranging from 1985 to July 2022 were derived from a total of 4500 multi-spectral Landsat satellite acquisitions on a catchment basis. The comparison of the SLE dynamics for the hydrological year 2021/22 with the long-term observations showed that the expected median SLE was exceeded by several hundred meters from January to March 2022. We linked these observations to products of the Alpine Drought Observatory (ADO) project, namely the Standardised Snowpack Index (SSPI) and river discharge in order to assess the relation between the location of the winter SLE, water storage in the snowpack (snow water equivalent, SWE), and river discharge in spring. We expect the winter SLE position derived from timely satellite imagery to have the potential for serving as an early warning indicator for upcoming hydrological droughts in the Alpine region for the spring season in the future. The presentation will give an overview of the satellite processing workflow, the SLE derivation and their long-term median statistics as well as an illustration of the 2022 SLE situation and the connection to the ADO parameters mentioned above.

Item URL in elib:https://elib.dlr.de/188574/
Document Type:Conference or Workshop Item (Speech)
Title:Potential of Satellite-derived long-term Snow Cover Dynamics for Alpine Drought Monitoring
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Köhler, JonasUNSPECIFIEDhttps://orcid.org/0000-0001-6086-2364UNSPECIFIED
Dietz, AndreasUNSPECIFIEDhttps://orcid.org/0000-0002-5733-7136UNSPECIFIED
Jacob, AlexanderUNSPECIFIEDhttps://orcid.org/0000-0003-4434-7244UNSPECIFIED
Bertoldi, GiacomoUNSPECIFIEDhttps://orcid.org/0000-0003-0397-8103UNSPECIFIED
Zellner, Peter JamesUNSPECIFIEDhttps://orcid.org/0000-0002-3394-9664UNSPECIFIED
Haslinger, KlausUNSPECIFIEDhttps://orcid.org/0000-0003-2237-9894UNSPECIFIED
Mayer, KonradUNSPECIFIEDhttps://orcid.org/0000-0002-8803-068XUNSPECIFIED
Date:14 September 2022
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:snow line elevation, remote sensing, drought forecasting, Landsat, Alps, climate change
Event Title:International Mountain Conference 2022
Event Location:Innsbruck, Österreich
Event Type:international Conference
Event Dates:11.-15. Sep. 2022
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Project Polar Monitor
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Land Surface Dynamics
Deposited By: Köhler, Jonas
Deposited On:07 Nov 2022 10:58
Last Modified:07 Nov 2022 10:58

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