Dataset for article: 

Geyman, E.C., van Pelt, W., Maloof, A.C., Faste Aas, H., and Kohler, J., 2021. "Historical glacier change on Svalbard predicts doubling of mass loss by 2100." Nature. 

Dataset description: 

This dataset contains the digital elevation models (DEMs), elevation change maps, point clouds, orthophotos, and vector outlines of glacier extents based on the Norwegian Polar Institute's collection of 5,507 high-oblique aerial images captured over Svalbard in 1936/1938. The photographs were analyzed through structure-from-motion (SfM) photogrammetry to generate 3D models. We also provide an .xlsx spreadsheet containing glacier-by-glacier statistics of ice loss and climate fields. Note that all of the raster and point cloud files listed below have been georeferenced in Metashape using the ground control points (GCPs) illustrated in Main Text, Fig. 2e, but have not undergone the co-registration and bias-correction following the methods of Nuth & Kaab (2011), which was done on a glacier-by-glacier basis. However, the glacier change budgets in the .xlsx file [#5 below] do reflect the values from the glacier-by-glacier co-registered and bias-corrected DEMs. See below for descriptions of each dataset. 

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Svalbard-wide datasets [all georeferenced Svalbard-wide datasets are in the coordinate system UTM 33N]: 


1. Svalbard-wide 1936 DEM (20 m and 50 m resolution) [georeferenced .tif file] 


2. Svalbard-wide 1936 orthomosaic (20 m resolution) [georeferenced .tif file] 


3. Svalbard-wide dh (1936-2010) (20 m and 50 m resolution) [georeferenced .tif file] 


4. Shapefile of 1936 glacier extents [ESRI .shp file] 


5. Glacier-by-glacier statistics [.xlsx file] 

The climate fields were extracted from the downscaled NOR10 dataset (1 km resolution), from van Pelt et. al. (2019).

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Regional-datasets: 

Due to file size limitations, the high-resolution (5 m) datasets are split into the 8 regions illustrated in Main Text, Fig. 2d: 

Zone 1 - South Spitsbergen

Zone 2 - Barentsoya-Edgeoya

Zone 3 - Austfonna

Zone 4 - Vestfonna

Zone 5 - Northeast Spitsbergen

Zone 6 - Central Spitsbergen

Zone 7 - Northwest Spitsbergen

Zone 8 - North Spitsbergen


6. Regional 1936 DEMs (5 m resolution) [georeferenced .tif files] 


7. Regional dh (1936-2010) (5 m resolution) [georeferenced .tif files] 


8. Local 1936 orthomosaics (5 m resolution) [georeferenced .tif files] 


9. Unprocessed point clouds [.laz files] 

These files represent the raw 3D point clouds (x,y,z) generated in Agisoft Metashape for each of the 17 local models described in Extended Data Figure 3. 

10. Thumbnail-sized copies of the 5,507 historical aerial images (1936 and 1938) analyzed in this study, along with a .csv file labeling the approximate location of each photograph.