Data

Antarctic Ice Sheet mass change since January 1979 (IMBIE)

Cumulative change in the mass of the Antarctic Ice Sheet each month from January 1979 to December 2023, from the IMBIE team's reconciliation of satellite surveys, with the one-sigma uncertainty. Negative values are a loss of ice.

Latest value

−4,779Gt

Antarctic Ice Sheet (West and East Antarctica and the Antarctic Peninsula), December 2023. Version 1.0.

Antarctic Ice Sheet mass change since January 1979 (IMBIE) (gigatonnes)

540 values from January 1979 to December 2023. The shaded band is the uncertainty range the producer gives.

Show as a table

Antarctic Ice Sheet mass change since January 1979 (IMBIE), every value
Period	Value (Gt)	Range	Status
1979-01	−5	−33 to 23	final
1979-02	−9	−49 to 30	final
1979-03	−14	−63 to 34	final
1979-04	−19	−75 to 37	final
1979-05	−24	−86 to 39	final
1979-06	−28	−97 to 40	final
1979-07	−33	−107 to 41	final
1979-08	−38	−117 to 41	final
1979-09	−42	−126 to 42	final
1979-10	−47	−135 to 41	final
1979-11	−52	−144 to 41	final
1979-12	−56	−153 to 40	final
1980-01	−58	−156 to 40	final
1980-02	−60	−159 to 39	final
1980-03	−62	−162 to 38	final
1980-04	−64	−164 to 37	final
1980-05	−66	−167 to 36	final
1980-06	−68	−170 to 35	final
1980-07	−69	−173 to 34	final
1980-08	−71	−175 to 33	final
1980-09	−73	−178 to 32	final
1980-10	−75	−181 to 31	final
1980-11	−77	−184 to 30	final
1980-12	−79	−186 to 29	final
1981-01	−79	−187 to 30	final
1981-02	−79	−188 to 30	final
1981-03	−79	−188 to 31	final
1981-04	−79	−189 to 32	final
1981-05	−79	−190 to 32	final
1981-06	−79	−190 to 33	final
1981-07	−79	−191 to 34	final
1981-08	−79	−192 to 34	final
1981-09	−79	−192 to 35	final
1981-10	−79	−193 to 36	final
1981-11	−79	−194 to 36	final
1981-12	−79	−194 to 37	final
1982-01	−81	−197 to 36	final
1982-02	−82	−199 to 34	final
1982-03	−84	−201 to 33	final
1982-04	−86	−204 to 32	final
1982-05	−88	−206 to 31	final
1982-06	−90	−209 to 30	final
1982-07	−91	−211 to 28	final
1982-08	−93	−213 to 27	final
1982-09	−95	−216 to 26	final
1982-10	−97	−218 to 25	final
1982-11	−99	−221 to 24	final
1982-12	−100	−223 to 22	final
1983-01	−102	−225 to 21	final
1983-02	−103	−227 to 21	final
1983-03	−104	−229 to 20	final
1983-04	−106	−231 to 19	final
1983-05	−107	−233 to 18	final
1983-06	−108	−234 to 18	final
1983-07	−110	−236 to 17	final
1983-08	−111	−238 to 16	final
1983-09	−112	−240 to 15	final
1983-10	−114	−242 to 14	final
1983-11	−115	−244 to 14	final
1983-12	−117	−246 to 13	final
1984-01	−115	−245 to 14	final
1984-02	−114	−244 to 16	final
1984-03	−113	−244 to 18	final
1984-04	−112	−243 to 20	final
1984-05	−110	−242 to 21	final
1984-06	−109	−242 to 23	final
1984-07	−108	−241 to 25	final
1984-08	−107	−240 to 27	final
1984-09	−106	−239 to 28	final
1984-10	−104	−239 to 30	final
1984-11	−103	−238 to 32	final
1984-12	−102	−237 to 33	final
1985-01	−101	−237 to 35	final
1985-02	−101	−237 to 36	final
1985-03	−100	−237 to 37	final
1985-04	−100	−237 to 38	final
1985-05	−99	−237 to 39	final
1985-06	−99	−237 to 40	final
1985-07	−98	−237 to 41	final
1985-08	−98	−237 to 42	final
1985-09	−97	−237 to 43	final
1985-10	−97	−237 to 44	final
1985-11	−96	−237 to 45	final
1985-12	−95	−237 to 46	final
1986-01	−101	−243 to 41	final
1986-02	−106	−248 to 37	final
1986-03	−111	−254 to 32	final
1986-04	−116	−259 to 27	final
1986-05	−121	−265 to 23	final
1986-06	−126	−271 to 18	final
1986-07	−131	−276 to 13	final
1986-08	−136	−282 to 9	final
1986-09	−142	−287 to 4	final
1986-10	−147	−293 to 0	final
1986-11	−152	−299 to −5	final
1986-12	−157	−304 to −10	final
1987-01	−168	−315 to −20	final
1987-02	−178	−327 to −30	final
1987-03	−189	−338 to −40	final
1987-04	−200	−349 to −51	final
1987-05	−210	−360 to −61	final
1987-06	−221	−371 to −71	final
1987-07	−232	−382 to −81	final
1987-08	−242	−393 to −91	final
1987-09	−253	−405 to −102	final
1987-10	−264	−416 to −112	final
1987-11	−275	−427 to −122	final
1987-12	−285	−438 to −132	final
1988-01	−297	−450 to −143	final
1988-02	−308	−462 to −154	final
1988-03	−319	−473 to −165	final
1988-04	−331	−485 to −176	final
1988-05	−342	−497 to −187	final
1988-06	−353	−509 to −198	final
1988-07	−365	−521 to −209	final
1988-08	−376	−532 to −220	final
1988-09	−387	−544 to −230	final
1988-10	−399	−556 to −241	final
1988-11	−410	−568 to −252	final
1988-12	−421	−580 to −263	final
1989-01	−431	−589 to −272	final
1989-02	−440	−599 to −281	final
1989-03	−450	−609 to −290	final
1989-04	−459	−619 to −299	final
1989-05	−469	−629 to −308	final
1989-06	−478	−639 to −317	final
1989-07	−487	−649 to −326	final
1989-08	−497	−659 to −335	final
1989-09	−506	−669 to −344	final
1989-10	−516	−678 to −353	final
1989-11	−525	−688 to −362	final
1989-12	−535	−698 to −371	final
1990-01	−541	−705 to −377	final
1990-02	−548	−712 to −383	final
1990-03	−554	−719 to −389	final
1990-04	−560	−726 to −395	final
1990-05	−567	−732 to −401	final
1990-06	−573	−739 to −407	final
1990-07	−580	−746 to −413	final
1990-08	−586	−753 to −419	final
1990-09	−593	−760 to −425	final
1990-10	−599	−767 to −431	final
1990-11	−605	−774 to −437	final
1990-12	−612	−780 to −443	final
1991-01	−612	−781 to −443	final
1991-02	−612	−782 to −443	final
1991-03	−612	−782 to −443	final
1991-04	−613	−783 to −442	final
1991-05	−613	−783 to −442	final
1991-06	−613	−784 to −442	final
1991-07	−613	−785 to −442	final
1991-08	−613	−785 to −441	final
1991-09	−614	−786 to −441	final
1991-10	−614	−786 to −441	final
1991-11	−614	−787 to −441	final
1991-12	−614	−788 to −441	final
1992-01	−612	−787 to −438	final
1992-02	−611	−786 to −435	final
1992-03	−609	−785 to −433	final
1992-04	−602	−782 to −423	final
1992-05	−596	−779 to −414	final
1992-06	−590	−775 to −404	final
1992-07	−584	−772 to −395	final
1992-08	−577	−769 to −386	final
1992-09	−571	−766 to −376	final
1992-10	−565	−763 to −367	final
1992-11	−559	−759 to −358	final
1992-12	−552	−756 to −349	final
1993-01	−553	−758 to −349	final
1993-02	−554	−760 to −348	final
1993-03	−555	−762 to −348	final
1993-04	−556	−764 to −348	final
1993-05	−557	−765 to −348	final
1993-06	−557	−767 to −348	final
1993-07	−558	−769 to −347	final
1993-08	−559	−771 to −347	final
1993-09	−560	−773 to −347	final
1993-10	−561	−775 to −347	final
1993-11	−562	−776 to −347	final
1993-12	−562	−778 to −347	final
1994-01	−572	−788 to −356	final
1994-02	−581	−798 to −365	final
1994-03	−591	−808 to −374	final
1994-04	−600	−818 to −383	final
1994-05	−610	−829 to −391	final
1994-06	−620	−839 to −400	final
1994-07	−629	−849 to −409	final
1994-08	−639	−859 to −418	final
1994-09	−648	−869 to −427	final
1994-10	−658	−879 to −436	final
1994-11	−667	−889 to −445	final
1994-12	−677	−899 to −454	final
1995-01	−686	−909 to −463	final
1995-02	−695	−918 to −472	final
1995-03	−704	−928 to −480	final
1995-04	−713	−938 to −489	final
1995-05	−722	−947 to −497	final
1995-06	−731	−957 to −506	final
1995-07	−741	−967 to −514	final
1995-08	−750	−976 to −523	final
1995-09	−759	−986 to −532	final
1995-10	−768	−996 to −540	final
1995-11	−777	−1,005 to −549	final
1995-12	−786	−1,015 to −557	final
1996-01	−794	−1,023 to −564	final
1996-02	−801	−1,031 to −571	final
1996-03	−809	−1,039 to −578	final
1996-04	−816	−1,047 to −585	final
1996-05	−823	−1,055 to −592	final
1996-06	−831	−1,063 to −599	final
1996-07	−838	−1,071 to −605	final
1996-08	−846	−1,079 to −612	final
1996-09	−853	−1,087 to −619	final
1996-10	−861	−1,096 to −626	final
1996-11	−868	−1,104 to −633	final
1996-12	−876	−1,112 to −640	final
1997-01	−882	−1,119 to −645	final
1997-02	−888	−1,127 to −650	final
1997-03	−895	−1,134 to −655	final
1997-04	−901	−1,142 to −660	final
1997-05	−907	−1,149 to −665	final
1997-06	−914	−1,157 to −671	final
1997-07	−920	−1,164 to −676	final
1997-08	−926	−1,172 to −681	final
1997-09	−933	−1,179 to −686	final
1997-10	−939	−1,187 to −691	final
1997-11	−945	−1,194 to −696	final
1997-12	−952	−1,202 to −701	final
1998-01	−960	−1,210 to −709	final
1998-02	−967	−1,219 to −716	final
1998-03	−975	−1,228 to −723	final
1998-04	−983	−1,236 to −730	final
1998-05	−991	−1,245 to −737	final
1998-06	−999	−1,254 to −744	final
1998-07	−1,007	−1,262 to −751	final
1998-08	−1,014	−1,271 to −758	final
1998-09	−1,022	−1,280 to −765	final
1998-10	−1,030	−1,288 to −772	final
1998-11	−1,038	−1,297 to −779	final
1998-12	−1,046	−1,305 to −786	final
1999-01	−1,056	−1,316 to −796	final
1999-02	−1,066	−1,327 to −805	final
1999-03	−1,076	−1,338 to −814	final
1999-04	−1,086	−1,348 to −823	final
1999-05	−1,096	−1,359 to −833	final
1999-06	−1,106	−1,370 to −842	final
1999-07	−1,116	−1,380 to −851	final
1999-08	−1,126	−1,391 to −861	final
1999-09	−1,136	−1,402 to −870	final
1999-10	−1,146	−1,412 to −879	final
1999-11	−1,156	−1,423 to −889	final
1999-12	−1,166	−1,434 to −898	final
2000-01	−1,177	−1,445 to −908	final
2000-02	−1,188	−1,457 to −919	final
2000-03	−1,199	−1,468 to −929	final
2000-04	−1,210	−1,480 to −939	final
2000-05	−1,221	−1,492 to −950	final
2000-06	−1,232	−1,503 to −960	final
2000-07	−1,243	−1,515 to −971	final
2000-08	−1,254	−1,526 to −981	final
2000-09	−1,265	−1,538 to −991	final
2000-10	−1,276	−1,549 to −1,002	final
2000-11	−1,286	−1,561 to −1,012	final
2000-12	−1,297	−1,572 to −1,022	final
2001-01	−1,305	−1,580 to −1,029	final
2001-02	−1,312	−1,588 to −1,036	final
2001-03	−1,320	−1,596 to −1,043	final
2001-04	−1,327	−1,604 to −1,050	final
2001-05	−1,335	−1,612 to −1,057	final
2001-06	−1,342	−1,620 to −1,064	final
2001-07	−1,349	−1,628 to −1,071	final
2001-08	−1,357	−1,636 to −1,078	final
2001-09	−1,364	−1,644 to −1,085	final
2001-10	−1,372	−1,652 to −1,091	final
2001-11	−1,379	−1,660 to −1,098	final
2001-12	−1,387	−1,668 to −1,105	final
2002-01	−1,395	−1,677 to −1,113	final
2002-02	−1,403	−1,686 to −1,121	final
2002-03	−1,412	−1,695 to −1,129	final
2002-04	−1,420	−1,704 to −1,136	final
2002-05	−1,428	−1,714 to −1,143	final
2002-06	−1,437	−1,723 to −1,150	final
2002-07	−1,445	−1,733 to −1,158	final
2002-08	−1,453	−1,742 to −1,165	final
2002-09	−1,462	−1,751 to −1,172	final
2002-10	−1,470	−1,761 to −1,179	final
2002-11	−1,479	−1,770 to −1,187	final
2002-12	−1,487	−1,780 to −1,194	final
2003-01	−1,498	−1,792 to −1,205	final
2003-02	−1,510	−1,804 to −1,216	final
2003-03	−1,521	−1,816 to −1,227	final
2003-04	−1,532	−1,827 to −1,237	final
2003-05	−1,544	−1,839 to −1,248	final
2003-06	−1,555	−1,851 to −1,259	final
2003-07	−1,566	−1,863 to −1,270	final
2003-08	−1,578	−1,875 to −1,281	final
2003-09	−1,590	−1,888 to −1,292	final
2003-10	−1,602	−1,900 to −1,304	final
2003-11	−1,614	−1,913 to −1,316	final
2003-12	−1,626	−1,926 to −1,327	final
2004-01	−1,634	−1,934 to −1,335	final
2004-02	−1,643	−1,943 to −1,342	final
2004-03	−1,651	−1,951 to −1,350	final
2004-04	−1,659	−1,960 to −1,358	final
2004-05	−1,667	−1,969 to −1,365	final
2004-06	−1,675	−1,977 to −1,373	final
2004-07	−1,683	−1,986 to −1,381	final
2004-08	−1,691	−1,994 to −1,388	final
2004-09	−1,699	−2,003 to −1,396	final
2004-10	−1,708	−2,011 to −1,404	final
2004-11	−1,716	−2,020 to −1,411	final
2004-12	−1,724	−2,029 to −1,419	final
2005-01	−1,728	−2,033 to −1,422	final
2005-02	−1,731	−2,038 to −1,425	final
2005-03	−1,735	−2,042 to −1,428	final
2005-04	−1,739	−2,047 to −1,431	final
2005-05	−1,743	−2,051 to −1,434	final
2005-06	−1,746	−2,056 to −1,437	final
2005-07	−1,750	−2,060 to −1,440	final
2005-08	−1,754	−2,065 to −1,443	final
2005-09	−1,758	−2,069 to −1,446	final
2005-10	−1,761	−2,074 to −1,449	final
2005-11	−1,765	−2,078 to −1,452	final
2005-12	−1,769	−2,083 to −1,455	final
2006-01	−1,780	−2,094 to −1,465	final
2006-02	−1,790	−2,106 to −1,475	final
2006-03	−1,801	−2,117 to −1,485	final
2006-04	−1,812	−2,129 to −1,495	final
2006-05	−1,822	−2,140 to −1,504	final
2006-06	−1,833	−2,152 to −1,514	final
2006-07	−1,844	−2,163 to −1,524	final
2006-08	−1,855	−2,175 to −1,534	final
2006-09	−1,865	−2,186 to −1,544	final
2006-10	−1,876	−2,198 to −1,554	final
2006-11	−1,887	−2,209 to −1,564	final
2006-12	−1,898	−2,221 to −1,574	final
2007-01	−1,919	−2,243 to −1,594	final
2007-02	−1,940	−2,265 to −1,614	final
2007-03	−1,961	−2,287 to −1,634	final
2007-04	−1,982	−2,309 to −1,655	final
2007-05	−2,003	−2,331 to −1,675	final
2007-06	−2,024	−2,353 to −1,695	final
2007-07	−2,045	−2,375 to −1,715	final
2007-08	−2,066	−2,397 to −1,735	final
2007-09	−2,087	−2,419 to −1,755	final
2007-10	−2,108	−2,441 to −1,775	final
2007-11	−2,129	−2,463 to −1,795	final
2007-12	−2,150	−2,485 to −1,816	final
2008-01	−2,167	−2,502 to −1,831	final
2008-02	−2,183	−2,519 to −1,847	final
2008-03	−2,199	−2,536 to −1,863	final
2008-04	−2,216	−2,553 to −1,878	final
2008-05	−2,232	−2,569 to −1,894	final
2008-06	−2,248	−2,586 to −1,910	final
2008-07	−2,264	−2,603 to −1,926	final
2008-08	−2,281	−2,620 to −1,941	final
2008-09	−2,297	−2,637 to −1,957	final
2008-10	−2,313	−2,654 to −1,973	final
2008-11	−2,330	−2,671 to −1,989	final
2008-12	−2,346	−2,688 to −2,004	final
2009-01	−2,361	−2,703 to −2,019	final
2009-02	−2,376	−2,719 to −2,034	final
2009-03	−2,391	−2,734 to −2,049	final
2009-04	−2,407	−2,750 to −2,064	final
2009-05	−2,422	−2,765 to −2,078	final
2009-06	−2,437	−2,781 to −2,093	final
2009-07	−2,452	−2,796 to −2,108	final
2009-08	−2,467	−2,812 to −2,123	final
2009-09	−2,482	−2,827 to −2,138	final
2009-10	−2,497	−2,843 to −2,152	final
2009-11	−2,513	−2,858 to −2,167	final
2009-12	−2,528	−2,874 to −2,182	final
2010-01	−2,546	−2,893 to −2,200	final
2010-02	−2,565	−2,912 to −2,219	final
2010-03	−2,584	−2,931 to −2,237	final
2010-04	−2,603	−2,950 to −2,255	final
2010-05	−2,621	−2,969 to −2,274	final
2010-06	−2,640	−2,988 to −2,292	final
2010-07	−2,659	−3,007 to −2,310	final
2010-08	−2,678	−3,027 to −2,329	final
2010-09	−2,696	−3,046 to −2,347	final
2010-10	−2,715	−3,065 to −2,365	final
2010-11	−2,734	−3,084 to −2,384	final
2010-12	−2,752	−3,103 to −2,402	final
2011-01	−2,769	−3,121 to −2,418	final
2011-02	−2,786	−3,138 to −2,435	final
2011-03	−2,803	−3,156 to −2,451	final
2011-04	−2,820	−3,173 to −2,468	final
2011-05	−2,837	−3,191 to −2,484	final
2011-06	−2,854	−3,208 to −2,501	final
2011-07	−2,871	−3,226 to −2,517	final
2011-08	−2,888	−3,243 to −2,533	final
2011-09	−2,905	−3,261 to −2,550	final
2011-10	−2,922	−3,278 to −2,566	final
2011-11	−2,939	−3,296 to −2,583	final
2011-12	−2,956	−3,313 to −2,599	final
2012-01	−2,976	−3,333 to −2,618	final
2012-02	−2,995	−3,353 to −2,637	final
2012-03	−3,015	−3,374 to −2,657	final
2012-04	−3,035	−3,394 to −2,676	final
2012-05	−3,054	−3,414 to −2,695	final
2012-06	−3,074	−3,434 to −2,714	final
2012-07	−3,094	−3,454 to −2,733	final
2012-08	−3,113	−3,474 to −2,752	final
2012-09	−3,133	−3,494 to −2,771	final
2012-10	−3,152	−3,515 to −2,790	final
2012-11	−3,172	−3,535 to −2,809	final
2012-12	−3,192	−3,555 to −2,829	final
2013-01	−3,215	−3,578 to −2,851	final
2013-02	−3,237	−3,602 to −2,873	final
2013-03	−3,260	−3,625 to −2,896	final
2013-04	−3,283	−3,648 to −2,918	final
2013-05	−3,306	−3,671 to −2,941	final
2013-06	−3,329	−3,695 to −2,963	final
2013-07	−3,352	−3,718 to −2,985	final
2013-08	−3,374	−3,741 to −3,008	final
2013-09	−3,397	−3,765 to −3,030	final
2013-10	−3,420	−3,788 to −3,053	final
2013-11	−3,443	−3,811 to −3,075	final
2013-12	−3,466	−3,834 to −3,097	final
2014-01	−3,488	−3,857 to −3,119	final
2014-02	−3,510	−3,880 to −3,141	final
2014-03	−3,533	−3,903 to −3,163	final
2014-04	−3,555	−3,926 to −3,184	final
2014-05	−3,577	−3,949 to −3,206	final
2014-06	−3,600	−3,971 to −3,228	final
2014-07	−3,622	−3,994 to −3,250	final
2014-08	−3,644	−4,017 to −3,271	final
2014-09	−3,666	−4,040 to −3,293	final
2014-10	−3,689	−4,063 to −3,315	final
2014-11	−3,711	−4,085 to −3,337	final
2014-12	−3,733	−4,108 to −3,358	final
2015-01	−3,747	−4,123 to −3,372	final
2015-02	−3,761	−4,137 to −3,385	final
2015-03	−3,775	−4,151 to −3,398	final
2015-04	−3,789	−4,166 to −3,412	final
2015-05	−3,803	−4,180 to −3,425	final
2015-06	−3,816	−4,194 to −3,439	final
2015-07	−3,830	−4,209 to −3,452	final
2015-08	−3,844	−4,223 to −3,465	final
2015-09	−3,858	−4,238 to −3,479	final
2015-10	−3,872	−4,252 to −3,492	final
2015-11	−3,886	−4,267 to −3,506	final
2015-12	−3,900	−4,281 to −3,519	final
2016-01	−3,908	−4,290 to −3,526	final
2016-02	−3,916	−4,298 to −3,534	final
2016-03	−3,924	−4,307 to −3,541	final
2016-04	−3,932	−4,316 to −3,549	final
2016-05	−3,940	−4,324 to −3,556	final
2016-06	−3,948	−4,333 to −3,563	final
2016-07	−3,956	−4,342 to −3,571	final
2016-08	−3,964	−4,350 to −3,578	final
2016-09	−3,972	−4,359 to −3,586	final
2016-10	−3,980	−4,367 to −3,593	final
2016-11	−3,988	−4,376 to −3,600	final
2016-12	−3,996	−4,385 to −3,608	final
2017-01	−4,009	−4,398 to −3,620	final
2017-02	−4,022	−4,412 to −3,633	final
2017-03	−4,035	−4,426 to −3,645	final
2017-04	−4,049	−4,439 to −3,658	final
2017-05	−4,062	−4,453 to −3,670	final
2017-06	−4,075	−4,467 to −3,683	final
2017-07	−4,088	−4,480 to −3,695	final
2017-08	−4,101	−4,494 to −3,707	final
2017-09	−4,114	−4,508 to −3,720	final
2017-10	−4,127	−4,522 to −3,732	final
2017-11	−4,140	−4,535 to −3,745	final
2017-12	−4,153	−4,549 to −3,757	final
2018-01	−4,171	−4,567 to −3,775	final
2018-02	−4,189	−4,586 to −3,792	final
2018-03	−4,207	−4,604 to −3,809	final
2018-04	−4,225	−4,623 to −3,826	final
2018-05	−4,243	−4,641 to −3,844	final
2018-06	−4,260	−4,660 to −3,861	final
2018-07	−4,278	−4,678 to −3,878	final
2018-08	−4,296	−4,697 to −3,896	final
2018-09	−4,314	−4,715 to −3,913	final
2018-10	−4,332	−4,734 to −3,930	final
2018-11	−4,350	−4,752 to −3,948	final
2018-12	−4,368	−4,771 to −3,965	final
2019-01	−4,382	−4,786 to −3,979	final
2019-02	−4,397	−4,801 to −3,993	final
2019-03	−4,411	−4,816 to −4,007	final
2019-04	−4,426	−4,832 to −4,021	final
2019-05	−4,441	−4,847 to −4,035	final
2019-06	−4,456	−4,863 to −4,049	final
2019-07	−4,470	−4,878 to −4,063	final
2019-08	−4,485	−4,894 to −4,076	final
2019-09	−4,500	−4,909 to −4,090	final
2019-10	−4,515	−4,925 to −4,104	final
2019-11	−4,529	−4,940 to −4,118	final
2019-12	−4,544	−4,956 to −4,132	final
2020-01	−4,555	−4,967 to −4,142	final
2020-02	−4,565	−4,978 to −4,152	final
2020-03	−4,576	−4,990 to −4,162	final
2020-04	−4,586	−5,001 to −4,172	final
2020-05	−4,597	−5,012 to −4,181	final
2020-06	−4,607	−5,023 to −4,191	final
2020-07	−4,618	−5,035 to −4,201	final
2020-08	−4,628	−5,046 to −4,211	final
2020-09	−4,639	−5,057 to −4,221	final
2020-10	−4,650	−5,068 to −4,231	final
2020-11	−4,660	−5,080 to −4,240	final
2020-12	−4,671	−5,091 to −4,250	final
2021-01	−4,679	−5,103 to −4,256	final
2021-02	−4,688	−5,115 to −4,261	final
2021-03	−4,697	−5,126 to −4,267	final
2021-04	−4,705	−5,138 to −4,272	final
2021-05	−4,714	−5,150 to −4,278	final
2021-06	−4,722	−5,162 to −4,283	final
2021-07	−4,731	−5,173 to −4,289	final
2021-08	−4,740	−5,185 to −4,294	final
2021-09	−4,748	−5,197 to −4,300	final
2021-10	−4,757	−5,208 to −4,306	final
2021-11	−4,766	−5,220 to −4,311	final
2021-12	−4,774	−5,232 to −4,317	final
2022-01	−4,779	−5,241 to −4,318	final
2022-02	−4,784	−5,250 to −4,319	final
2022-03	−4,789	−5,259 to −4,319	final
2022-04	−4,789	−5,264 to −4,315	final
2022-05	−4,790	−5,269 to −4,311	final
2022-06	−4,790	−5,274 to −4,307	final
2022-07	−4,781	−5,266 to −4,296	final
2022-08	−4,772	−5,258 to −4,285	final
2022-09	−4,763	−5,250 to −4,275	final
2022-10	−4,753	−5,243 to −4,264	final
2022-11	−4,744	−5,235 to −4,253	final
2022-12	−4,735	−5,227 to −4,242	final
2023-01	−4,739	−5,233 to −4,244	final
2023-02	−4,742	−5,238 to −4,246	final
2023-03	−4,746	−5,244 to −4,248	final
2023-04	−4,750	−5,249 to −4,250	final
2023-05	−4,753	−5,255 to −4,252	final
2023-06	−4,757	−5,260 to −4,254	final
2023-07	−4,761	−5,265 to −4,256	final
2023-08	−4,765	−5,271 to −4,258	final
2023-09	−4,768	−5,276 to −4,260	final
2023-10	−4,772	−5,282 to −4,262	final
2023-11	−4,776	−5,287 to −4,264	final
2023-12	−4,779	−5,293 to −4,266	final

IMBIE: Otosaka et al. (2026), Mass balance of the Greenland and Antarctic Ice Sheets from the 1970s to 2023 (Version 1.0), NERC EDS UK Polar Data Centre, doi:10.5285/128c5e33-5224-4197-82f0-19dcc95b80a0; Otosaka et al. (2026), Scientific Data 13, 1301, doi:10.1038/s41597-026-08088-0. Contains public sector information licensed under the Open Government Licence v3.0. Open Government Licence v3.0.

Where it comes from

Producer: IMBIE Team (led from Northumbria University); archived by the NERC EDS UK Polar Data Centre · Mass balance of the Greenland and Antarctic ice sheets from the 1970s to 2023 (IMBIE 2026)
Version: 1.0
File: https://ramadda.data.bas.ac.uk/repository/entry/get/imbie3_antarctica_Gt_partitioned.csv?entryid=synth%3A128c5e33-5224-4197-82f0-19dcc95b80a0%3AL2ltYmllM19hbnRhcmN0aWNhX0d0X3BhcnRpdGlvbmVkLmNzdg%3D%3D
Fetched: 2026-10-05 (automatically), 83,257 bytes
Fingerprint: sha256 cdb5f37c703af3fb36ccbf89f6ca0ba8b444817cb48ff34cc77ca7a9d9a525b2 · Last-Modified Mon, 06 Jul 2026 10:07:40 GMT
Copies: No Wayback copy recorded yet.Our copy of the exact file
Cite the producer: Otosaka, I., Shepherd, A., Amory, C., Horwath, M., King, M., Nowicki, S., Payne, A., Rignot, E., Sørensen, L., Schlegel, N., Simon, K., Smith, B., Sutterley, T., van den Broeke, M., Velicogna, I., A, G., Agosta, C., Ditmar, P., Döhne, T., … Wouters, B. (2026). Mass balance of the Greenland and Antarctic Ice Sheets from the 1970s to 2023 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/128c5e33-5224-4197-82f0-19dcc95b80a0

What was done to it

Read the 'Cumulative mass balance anomaly (Gt)' column of imbie3_antarctica_Gt_partitioned.csv (IMBIE version 1.0), 1979-01 to 2023-12, as printed.
Code: pipeline/src/envdash/transforms/ice/imbie_2026.py · code sha256 890ecd9e82cc65eb… · inputs cdb5f37c703a…
Lower and upper are the value minus and plus the file's 'Cumulative mass balance anomaly uncertainty (Gt)', which the file states is one standard deviation (exact decimal arithmetic).
Code: pipeline/src/envdash/transforms/ice/imbie_2026.py · code sha256 890ecd9e82cc65eb… · inputs cdb5f37c703a…

What it covers

Geography: Antarctic Ice Sheet (West and East Antarctica and the Antarctic Peninsula)
Baseline: Zero just before January 1979, the start of IMBIE's Antarctic record; the first month's value is that month's change.
Basis: Reconciled from 21 independent satellite estimates (altimetry, gravimetry and the input-output method) by IMBIE 2026; total mass balance, the sum of surface mass balance and ice dynamics.
Unit: gigatonnes (Gt)

Get the numbers

CSV JSON, with full provenance

Licence: Open Government Licence v3.0 (free to reuse with credit). Credit: IMBIE: Otosaka et al. (2026), Mass balance of the Greenland and Antarctic Ice Sheets from the 1970s to 2023 (Version 1.0), NERC EDS UK Polar Data Centre, doi:10.5285/128c5e33-5224-4197-82f0-19dcc95b80a0; Otosaka et al. (2026), Scientific Data 13, 1301, doi:10.1038/s41597-026-08088-0. Contains public sector information licensed under the Open Government Licence v3.0.

How to cite

Otosaka, I., Shepherd, A., Amory, C., Horwath, M., King, M., Nowicki, S., Payne, A., Rignot, E., Sørensen, L., Schlegel, N., Simon, K., Smith, B., Sutterley, T., van den Broeke, M., Velicogna, I., A, G., Agosta, C., Ditmar, P., Döhne, T., … Wouters, B. (2026). Mass balance of the Greenland and Antarctic Ice Sheets from the 1970s to 2023 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/128c5e33-5224-4197-82f0-19dcc95b80a0 Via Environment Dashboard, https://environmentdashboard.org/data/ice-sheet-mass/imbie-2026/antarctica (version 1.0, data accessed 2026-10-05).

Sources

Mass balance of the Greenland and Antarctic ice sheets from the 1970s to 2023 (IMBIE 2026)Report a problem with this number