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| The Upper Grindelwald Glacier in 1835 Painting by Thomas Fearnley (National Gallery, Oslo) |
Two institutions, Euro-Climhist and the World Glacier Monitoring Service (WGMS) collaborated on this effort. Euro-Climhist, housed at the University of Bern, compiles historical climate and weather data, including information on glaciers. The WGMS, based at the University of Zurich, collects and shares standardised glacier data.
In late 2021, Euro-Climhist and WGMS joined forces to preserve and share historical glacier images as part of the Euro-Climhist database. The paintings, photos and maps of the Grindelwald glaciers and Mont Blanc’s Mer de Glace will expand insights into past glacier fluctuations, helping researchers and the public to understand historical climate events and facilitating the assessment of current and future climate trends.
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| The Mer de Glace and its extent in the c17 (green) and c19 (red) Reconstruction by S Nussbaumer and R Wolf |
Historical glacier images play a crucial role in understanding interactions between glaciers and climate before the days of systematic measurements. Drawings, paintings, prints, and early photographs can document glacier levels dating back to the 16th century, with some help from meticulous analysis and interpretation of image quality.
The 300 or so images of the Grindelwald and the Mer de Glace glaciers, both well studied since the eighteenth century and before, have been enriched with metadata such as the artist’s name, descriptions and dates. Images are categorised into five types: drawings, oil paintings, prints, photographs, or maps, each varying in accuracy. Drawings and photographs are considered most precise, while oil paintings and prints offer valuable insights despite some imprecision.
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| First known depiction of Lower Grindelwald Glacier Before 1642, by Joseph Plepp and Matthäus Merian (Swiss National Library) |
The project's pilot team consisted of researchers from the University of Zurich and the University of Bern, blending natural science, art, and environmental history perspectives. The initial series of integrated glacier images showcases the potential of historical images for understanding past climate trends. While the project focused on the Grindelwald glaciers and the Mer de Glace, more images from various regions could provide further insights.
The initiative was supported by MeteoSwiss, the national weather agency, within the framework of Switzerland’s affiliation to the Global Climate Observing System (GCOS), which gathers high-quality climate observations worldwide.
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| The Lower Grindelwald Glacier in July 1826 By Samuel Birmann (Kunstmuseum Basel) |
The sensitivity of glaciers to climate fluctuations makes them vital indicators for climate change. Fluctuations in temperature and precipitation directly influence glacier size and mass. The alpine glaciers are shrinking fast due to warming temperatures and less snowfall, with this trend accelerating in recent years.
References
Translated and summarised from the MeteoSuisse blog, “Historische Gletscherbilder ermöglichen Rekonstruktion von vergangenen Gletscherständen”, 18 August 2023.
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