Data
Global glacier mass change each year (WGMS)
Change in the mass of the world's glaciers in each hydrological year since 1976, from the World Glacier Monitoring Service's annual estimates, with the one-sigma uncertainty. Negative values are a loss of ice.
Latest value
−408Gt
All glaciers worldwide, excluding the two ice sheets, 2025. Version 2026-02-10.
Global glacier mass change each year (WGMS) (gigatonnes)
Show as a table
| Period | Value (Gt) | Range | Status |
|---|---|---|---|
| 1976 | 12 | −94 to 119 | final |
| 1977 | −41 | −147 to 66 | final |
| 1978 | −50 | −156 to 56 | final |
| 1979 | −86 | −192 to 20 | final |
| 1980 | 31 | −74 to 136 | final |
| 1981 | 61 | −44 to 167 | final |
| 1982 | −96 | −201 to 9 | final |
| 1983 | 115 | 10 to 220 | final |
| 1984 | −99 | −203 to 5 | final |
| 1985 | −34 | −137 to 70 | final |
| 1986 | −54 | −157 to 49 | final |
| 1987 | 81 | −22 to 184 | final |
| 1988 | 43 | −59 to 146 | final |
| 1989 | −117 | −219 to −15 | final |
| 1990 | −265 | −367 to −164 | final |
| 1991 | −100 | −202 to 1 | final |
| 1992 | 24 | −77 to 125 | final |
| 1993 | −184 | −284 to −83 | final |
| 1994 | −143 | −243 to −43 | final |
| 1995 | −208 | −308 to −108 | final |
| 1996 | −128 | −227 to −30 | final |
| 1997 | −320 | −419 to −221 | final |
| 1998 | −108 | −206 to −9 | final |
| 1999 | −261 | −359 to −163 | final |
| 2000 | −133 | −208 to −59 | final |
| 2001 | −176 | −249 to −104 | final |
| 2002 | −160 | −235 to −85 | final |
| 2003 | −227 | −301 to −154 | final |
| 2004 | −342 | −415 to −268 | final |
| 2005 | −326 | −399 to −253 | final |
| 2006 | −271 | −343 to −198 | final |
| 2007 | −286 | −358 to −214 | final |
| 2008 | −159 | −231 to −88 | final |
| 2009 | −310 | −381 to −239 | final |
| 2010 | −153 | −224 to −82 | final |
| 2011 | −353 | −424 to −283 | final |
| 2012 | −208 | −278 to −138 | final |
| 2013 | −229 | −298 to −159 | final |
| 2014 | −137 | −206 to −68 | final |
| 2015 | −283 | −352 to −214 | final |
| 2016 | −349 | −417 to −280 | final |
| 2017 | −247 | −315 to −179 | final |
| 2018 | −224 | −292 to −155 | final |
| 2019 | −434 | −502 to −366 | final |
| 2020 | −461 | −529 to −393 | final |
| 2021 | −307 | −374 to −239 | final |
| 2022 | −458 | −525 to −390 | final |
| 2023 | −555 | −624 to −487 | final |
| 2024 | −461 | −528 to −393 | final |
| 2025 | −408 | −475 to −341 | final |
Where it comes from
- Producer
- World Glacier Monitoring Service (WGMS), University of Zurich · Annual mass-change estimates for the world's glaciers (version 2026-02-10)
- Version
- 2026-02-10
- Fetched
- 2026-10-05 (automatically), 53,589,520 bytes
- Fingerprint
- sha256 b88c2355650142160594c96dcb800e3fb58d82abbebd0ab2d976a458153e2eccETag "331b610-64b93f5a76d99" · Last-Modified Tue, 24 Feb 2026 15:58:33 GMT
- Copies
- No Wayback copy recorded yet.Our copy of the exact file
- Cite the producer
- WGMS (2026): Annual mass-change estimates for the world's glaciers. Individual glacier time series and gridded data products. Digital media. https://doi.org/10.5904/wgms-amce-2026-02-10 Dussaillant, I., Hugonnet, R., Huss, M., Berthier, E., Bannwart, J., Paul, F., and Zemp, M. (2025): Annual mass change of the world's glaciers from 1976 to 2024 by temporal downscaling of satellite data with in-situ observations. Earth System Science Data 17(5): 1977–2006. https://doi.org/10.5194/essd-17-1977-2025
What was done to it
Read global.csv from wgms-amce-2026-02-10.zip (hydrological years 1976 to 2025) and published the gt column (glacier mass change in Gt) as printed.
Code: pipeline/src/envdash/transforms/ice/wgms_amce.py · code sha256 ee23473d77b7f2d7… · inputs b88c23556501…
Lower and upper are gt minus and plus gt_sigma, which the release README defines as the 1-sigma uncertainty (exact decimal arithmetic).
Code: pipeline/src/envdash/transforms/ice/wgms_amce.py · code sha256 ee23473d77b7f2d7… · inputs b88c23556501…
Checked that gt_cumsum and mmsle_cumsum are the running sums of gt and mmsle (within rounding), and that mmsle has the opposite sign of gt, so that positive mm is a rise in sea level.
Code: pipeline/src/envdash/transforms/ice/wgms_amce.py · code sha256 ee23473d77b7f2d7… · inputs b88c23556501…
What it covers
- Geography
- All glaciers worldwide, excluding the two ice sheets
- Basis
- All glaciers outside the Greenland and Antarctic ice sheets (Randolph Glacier Inventory 6.0 outlines), from satellite elevation changes downscaled to single years with field measurements. Hydrological years, labelled by the year they end: from 1 October in the Northern Hemisphere, 1 April in the Southern Hemisphere and 1 January in the tropics.
- Unit
- gigatonnes (Gt)