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University of Graz News Gletscherschwund

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Monday, 28 March 2022

Gletscherschwund

Die Pasterze im Jahr 2020 (Foto: Uni Graz/ Lieb)

Die Pasterze im Jahr 2020 (Foto: Uni Graz/ Lieb, Archiv)

Rettung der Pasterze wäre wirtschaftlich nicht leistbar, zeigt neue Studie.

An Österreichs größtem und bekanntestem Gletscher lässt sich der Klimawandel begreifen wie kaum wo anders. Die Pasterze hat in den letzten Jahrzehnten deutlich an Masse verloren, und mit dem Eis schwindet auch die touristische Attraktivität. Könnte man mit einer Schicht aus Kunstschnee den Gletscher retten? Dieses hypothetische Experiment haben ForscherInnen der Universität Graz durchgeführt.

„Anhand von Modellierungen haben wir festgestellt, dass genügend Wasser vorhanden wäre, um der Pasterze mit Kunstschnee eine Schutzschicht gegen das Abschmelzen zu verpassen“, berichtet Jakob Abermann, Forscher am Institut für Geographie und Raumforschung der Universität Graz und Hauptautor der Studie. Abgesehen von den ökologischen Konsequenzen wäre das Projekt aus wirtschaftlichen Gesichtspunkten allerdings nicht tragfähig. Die Ergebnisse zeigen, dass die Kosten für die Erhaltung schon jetzt um ein Vielfaches höher wären als alle bestehenden Tourismuseinnahmen zusammen. Mit den steigenden Temperaturen würde der Aufwand in naher Zukunft noch größer werden, da man noch mehr Schmelze kompensieren müsste. Abermann erklärt zur Motivation der Studie: „Wir möchten darauf hinweisen, dass wir hier nicht eine konkrete, umsetzbare Idee oder einen Auftrag verfolgen, sondern dass wir eine hervorragende Datengrundlage genützt haben, um prinzipiell die klimatologischen und ökonomischen Randbedingungen eingrenzen zu können“, erklärt Abermann zur Motivation der Studie.

An diesem Beispiel zeigt sich deutlich, wie schwer es wäre, die Folgen des Klimawandels auszugleichen. Studien des Wegener Centers für Klima und Globalen Wandel der Universität Graz zeigen, dass für eine Erhaltung unseres Lebensumfeldes eine Senkung des CO2-Ausstoßes um 90 Prozent notwendig wäre.

Publikation: „Too expensive to keep – bidding farewell to an iconic mountain glacier?” Regional Environmental Change, https://doi.org/10.1007/s10113-022-01912-4

created by Joachim Hirtenfellner

Related news

Electrifying: Researchers film the first moments on the way from light to electricity

Physicists at the University of Graz (Austria), in collaboration with colleagues from Marburg University and Forschungszentrum Jülich (Germany), have achieved a scientific breakthrough. For the first time, the generation of electrical energy from light has been filmed and described theoretically. This work is of far-reaching significance, not least for optimising sustainable energy production from photovoltaics. This is because it provides fundamental building blocks for understanding the physical processes that take place, for example, in organic solar cells. The paper was published in the journal Physical Review X, one of the world’s most prestigious physics journals.

University of Graz: Working together to make Styria a sustainable centre of learning

Round table calls for sustainable funding for the 2028–2030 performance agreement period between the five Styrian universities and the federal government.

How can we teach using YouTube and AI? The University of Graz is strengthening media education in schools

A journey through the blood vessels using VR headsets brings biology lessons to life. An interactive quiz brings physics to life. The YouTube video explains the First World War. Whilst mobile phones are increasingly being banned from the classroom, social media platforms, apps and AI are playing an ever-greater role in knowledge transfer at school. But how can teaching with media be made even more effective? What are the challenges in media-based teaching? At the University of Graz, researchers are discussing these issues at a conference being held in Austria for the first time.

Jurassic Sounds: Biologist reconstructs insect songs from 165 million years ago

It was apparently not just the roars of the dinosaurs that made up the soundscape of the animal world during the Jurassic period. Crickets and grasshoppers communicated through a variety of songs and high-pitched sounds, as Thorin Jonsson from the Institute of Biology at the University of Graz discovered together with colleagues from the universities of Lincoln, Bristol (UK), Beijing (China) and Tempe (USA). The findings on what are so far the oldest traces of sound on Earth have just been published in the journal PNAS.

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