Data
Global glacier mass change since 1975 (WGMS)
Cumulative change in the mass of the world's glaciers since the start of hydrological year 1976 (late 1975), from the World Glacier Monitoring Service's annual estimates, with the one-sigma uncertainty. Negative values are a loss of ice.
Latest value
−9,583Gt
All glaciers worldwide, excluding the two ice sheets, 2025. Version 2026-02-10.
Global glacier mass change since 1975 (WGMS) (gigatonnes)
Show as a table
| Period | Value (Gt) | Range | Status |
|---|---|---|---|
| 1976 | 12 | −94 to 119 | final |
| 1977 | −28 | −179 to 123 | final |
| 1978 | −78 | −263 to 106 | final |
| 1979 | −164 | −377 to 48 | final |
| 1980 | −133 | −370 to 104 | final |
| 1981 | −72 | −332 to 188 | final |
| 1982 | −168 | −448 to 112 | final |
| 1983 | −53 | −352 to 246 | final |
| 1984 | −152 | −469 to 165 | final |
| 1985 | −186 | −519 to 148 | final |
| 1986 | −240 | −589 to 109 | final |
| 1987 | −159 | −522 to 205 | final |
| 1988 | −115 | −493 to 263 | final |
| 1989 | −232 | −624 to 159 | final |
| 1990 | −498 | −902 to −93 | final |
| 1991 | −598 | −1,015 to −181 | final |
| 1992 | −574 | −1,003 to −145 | final |
| 1993 | −758 | −1,198 to −317 | final |
| 1994 | −900 | −1,352 to −449 | final |
| 1995 | −1,108 | −1,571 to −646 | final |
| 1996 | −1,237 | −1,710 to −764 | final |
| 1997 | −1,556 | −2,040 to −1,073 | final |
| 1998 | −1,664 | −2,157 to −1,171 | final |
| 1999 | −1,925 | −2,428 to −1,423 | final |
| 2000 | −2,059 | −2,567 to −1,550 | final |
| 2001 | −2,235 | −2,749 to −1,722 | final |
| 2002 | −2,395 | −2,914 to −1,876 | final |
| 2003 | −2,623 | −3,147 to −2,099 | final |
| 2004 | −2,964 | −3,493 to −2,435 | final |
| 2005 | −3,290 | −3,825 to −2,756 | final |
| 2006 | −3,561 | −4,100 to −3,022 | final |
| 2007 | −3,847 | −4,391 to −3,303 | final |
| 2008 | −4,006 | −4,555 to −3,458 | final |
| 2009 | −4,316 | −4,870 to −3,763 | final |
| 2010 | −4,470 | −5,027 to −3,912 | final |
| 2011 | −4,823 | −5,385 to −4,261 | final |
| 2012 | −5,032 | −5,598 to −4,465 | final |
| 2013 | −5,260 | −5,831 to −4,690 | final |
| 2014 | −5,397 | −5,972 to −4,823 | final |
| 2015 | −5,680 | −6,259 to −5,101 | final |
| 2016 | −6,029 | −6,612 to −5,446 | final |
| 2017 | −6,276 | −6,863 to −5,689 | final |
| 2018 | −6,500 | −7,091 to −5,909 | final |
| 2019 | −6,934 | −7,529 to −6,339 | final |
| 2020 | −7,395 | −7,993 to −6,796 | final |
| 2021 | −7,701 | −8,304 to −7,098 | final |
| 2022 | −8,159 | −8,765 to −7,553 | final |
| 2023 | −8,714 | −9,325 to −8,104 | final |
| 2024 | −9,175 | −9,789 to −8,561 | final |
| 2025 | −9,583 | −10,201 to −8,966 | 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_cumsum column (cumulative 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_cumsum minus and plus gt_cumsum_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
- Baseline
- Zero at the start of hydrological year 1976 (October 1975 in the Northern Hemisphere, April 1975 in the Southern Hemisphere, January 1976 in the tropics).
- 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)