Swiss glaciers 1850–2100

Vadret Prievlus

IceIce lost since 1850This glacier

Past extents come from the Swiss Glacier Inventories of 1850, 1931, 1973 and 2016. Future extents are illustrative: each glacier’s projected area (OGGM, median of CMIP6 climate models) is removed from its lowest ice upward. About the scenarios.

Inventory 0.203km² Area in 2016 · ±0% compared with 2016
Area 20160.20km²478th largest
Elevation2,794–3,594mmedian 3,101 m
Length0.7kmfaces north-east
Area since 1850−43%0.36 km² in 1850
Thinning 1985–2022−25maverage surface lowering
Ice left in 210021%of 2020 volume, SSP2-4.5

Vadret Prievlus is one of 1,400 glaciers in Switzerland, covering 0.20 km² in the canton of Graubünden. Its ice spans 2,794 to 3,594 m and faces north-east. Its meltwater drains to the Inn and on to the Black Sea. In 1850, at the end of the Little Ice Age, it covered 0.36 km²; by 2016 it had lost 43% of that area. Between 1985 and 2022 its surface dropped by 25 m on average. With strong climate protection (SSP1-2.6), about 59% of its 2020 ice would remain in 2100. With very high emissions (SSP5-8.5) it would be gone around 2078. Its meltwater is projected to peak around 2037.

Future

What remains in 2100

SSP1-2.6 · low emissions59%62% left in 2050
SSP2-4.5 · intermediate emissions21%63% left in 2050
SSP3-7.0 · high emissionsGoneIce gone around 2095
SSP5-8.5 · very high emissionsGoneIce gone around 2078
SSP1-2.6SSP2-4.5SSP3-7.0SSP5-8.5
0%25%50%75%100%2020204020602080210059%21%0%0%
Ice volume as a share of 2020, median of 14 climate models; shaded: middle two-thirds of models. OGGM v1.6.

Meltwater

Million m³ of water per year, 11-year mean

00.51.01.520102030205020702090
Water leaving the glacier area each year: ice melt, snowmelt and rain. It rises while the glacier melts faster, then falls as the ice runs out: “peak water”.
Measured

The record

Thinning since 1985

Average change in surface height, from comparing elevation models made from maps, aerial images and laser scans.

−30 m−20 m−10 m0 m1990200020102020−25 m
GLAMOS Swiss Glacier Volume Change, release 2025.
Profile

Facts

Area over time

18500.357 km²19310.277 km²19730.226 km²20160.203 km²2050 · SSP2-4.50.139 km²2100 · SSP2-4.50.060 km²

Past areas are the ice body this glacier belonged to at the time. Projections: OGGM median, SSP2-4.5.

SGI id
E22-06
Canton
Graubünden
River
Inn → Black Sea
Basin
Inn
Location
46.4020° N, 9.9100° E · swisstopo map
Elevation
2,794–3,594 m, median 3,101 m
Slope, aspect
37°, north-east
Debris cover
0.01 km² (5% of the area)
Inventory image
2016
Ice volume (model)
≈ 0.007 km³ in 2020 (OGGM)
RGI ids
RGI60-11.02065, RGI60-11.02084
Nearby

More in the Inn basin

All glaciers in this basin →

Sources

Sources

  1. Linsbauer et al. (2021). The new Swiss Glacier Inventory SGI2016. Frontiers in Earth Science 9. doi.org/10.3389/feart.2021.704189
  2. Mannerfelt et al. (2022). Halving of Swiss glacier volume since 1931 observed from terrestrial image photogrammetry. The Cryosphere 16. doi.org/10.5194/tc-16-3249-2022
  3. GLAMOS – Glacier Monitoring Switzerland. www.glamos.ch
  4. Zekollari et al. (2024). Twenty-first century global glacier evolution under CMIP6 scenarios and the role of glacier-specific observations. The Cryosphere 18 (OGGM v1.6 projections). tc.copernicus.org/articles/18/5045/2024/

Relief: swisstopo swissALTIRegio. 1850 and 1973 outlines: Maisch et al. (2000), Müller et al. (1976), Paul (2004). Length, mass balance and volume change: GLAMOS releases 2025. All sources and methods.

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