Hintereisferner glacier: A tale of human-induced climate change

Sustainable Development Goals (SDGs)

The Hintereisferner, a sentinel glacier nestled at the rear of the Tyrolean Ötztal in the Alps, has been monitored for more than 100 years. There are continuous records of the glacier’s mass balance dating back to 1952, and these records have been the focus of decades of climate research at the University of Innsbruck.

Scanning technology

What sets apart the research at Hintereisferner from other glacier studies is the technology used by scientists. Since 2016, a unique system – a terrestrial laser scanner – has been scanning the glacier’s surface daily, registering real-time elevation changes. This provides experts with a precise record of its volume fluctuations.

Glacier Loss Day

Annelies Voordendag, the lead glaciologist from Innsbruck, introduced a term that represents the balance of the glacier: “Glacier Loss Day” or GLD. This term symbolizes the day when the ice accumulated during winter begins to melt. “Tracking the volume and mass changes of a glacier in daily time steps allows a nearly instant evaluation of the state of a glacier in a particular year,” wrote the study authors. “We introduce the Glacier Loss Day (GLD) as being the day in the hydrological year on which the mass accumulated during winter is lost, and the glacier loses mass irrecoverably for the rest of the mass balance year.”

Snapshot of the glacier’s health

The researchers said it became clear early in the summer of 2022 that Glacier Loss Day would be reached very soon. They compared GLD to the Earth Overshoot Day, which marks the date when we use up more natural resources than the Earth can renew in a year. According to the experts, monitoring this Glacier Loss Day provides a snapshot of the Hintereisferner’s health each year. “The earlier the GLD is reached, the higher the probability of massive mass loss. The key to interpreting and using the GLD as a near-real-time gross but expressive indicator for a glacier’s state of ‘illness’ is to record its progressing volume and mass loss during an ablation season at a daily resolution,” explained the researchers.

Extreme negative balances

In 2022, the GLD for the Hintereisferner was recorded as early as June 23rd. By contrast, the Glacier Loss Day in the preceding two years was not reached until mid-August. Even during years with extreme negative balances, like 2003 and 2018, this date was not recorded until July’s end. The premature Glacier Loss Day indicates that the Hintereisferner spends a larger portion of the year losing mass rather than staying balanced or gaining.

Anthropogenic climate change

“These are clear signals of anthropogenic climate change. The consequences of our greenhouse gas emissions are already hitting us hard today,” said glaciologist Rainer Prinz. The repercussions of human-induced greenhouse gas emissions are manifesting now, and the trend only seems to escalate. The team’s study paints a grim future – projecting that in a span of 10 to 20 years, only half of the Hintereisferner will remain. “These are clear climate change signals that are due to anthropogenic global warming and the consequences of our greenhouse gas emissions, which are already fully affecting us today,” wrote the study authors. The research is published in the journal The Cryosphere.

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SDGs, Targets, and Indicators

1. SDG 13: Climate Action

   • Target 13.1: Strengthen resilience and adaptive capacity to climate-related hazards and natural disasters
   • Target 13.2: Integrate climate change measures into national policies, strategies, and planning
   • Target 13.3: Improve education, awareness-raising, and human and institutional capacity on climate change mitigation, adaptation, impact reduction, and early warning
   • Target 13.4: Implement the commitment undertaken by developed countries to mobilize financial resources to support developing countries in their efforts to mitigate climate change and adapt to its impacts
   • Target 13.5: Promote mechanisms for raising capacity for effective climate change-related planning and management in least developed countries and small island developing states

   The article highlights the impact of anthropogenic climate change on the Hintereisferner glacier. The melting of the glacier is a clear signal of climate change, indicating the need for climate action.

2. SDG 15: Life on Land

   • Target 15.1: By 2020, ensure the conservation, restoration, and sustainable use of terrestrial and inland freshwater ecosystems and their services
   • Target 15.2: By 2020, promote the implementation of sustainable management of all types of forests, halt deforestation, restore degraded forests, and substantially increase afforestation and reforestation globally
   • Target 15.5: Take urgent and significant action to reduce the degradation of natural habitats, halt the loss of biodiversity, and protect and prevent the extinction of threatened species

   The melting of glaciers like Hintereisferner contributes to the degradation of natural habitats and the loss of biodiversity. The article emphasizes the need to address these issues through sustainable land management.

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Source: earth.com

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