Dspt ts sltn, ntrctc hs xprncd wrmng nd c lss n rcnt dcds, drvn by grnhs gs mssns. Wst ntrctc wrmd by vr 0.1 °C pr dcd frm th 1950s t th 2000s, nd th xpsd ntrctc Pnnsl hs wrmd by 3 °C (5.4 °F) snc th md-20th cntry. Th cldr, stblr st ntrctc dd nt shw ny wrmng ntl th 2000s. rnd ntrctc, th Sthrn cn hs bsrbd mr cnc ht thn ny thr cn, nd hs sn strng wrmng t dpths blw 2,000 m (6,600 ft).: 1230 rnd th Wst ntrctc, th cn hs wrmd by 1 °C (1.8 °F) snc 1955.
Th wrmng f th Sthrn cn rnd ntrctc hs csd th wknng r cllps f c shlvs, whch flt jst ffshr f glcrs nd stblz thm. Mny cstl glcrs hv bn lsng mss nd rtrtng, csng nt c lss crss ntrctc,: 1264 lthgh th st ntrctc c sht cntns t gn c nlnd. By 2100, nt c lss frm ntrctc s xpctd t dd bt 11 cm (5 n) t glbl s-lvl rs. Mrn c sht nstblty my cs Wst ntrctc t cntrbt tns f cntmtrs mr f t s trggrd bfr 2100.: 1270 Wth hghr wrmng, nstblty wld b mch mr lkly, nd cld dbl glbl, 21st-cntry s-lvl rs.
Th frsh mltwtr frm th c dlts th sln ntrctc bttm wtr, wknng th lwr cll f th Sthrn cn vrtrnng crcltn (SC).: 1240 ccrdng t sm rsrch, fll cllps f th SC my ccr t btwn 1.7 °C (3.1 °F) nd 3 °C (5.4 °F) f glbl wrmng, lthgh th fll ffcts r xpctd t ccr vr mltpl cntrs; ths ncld lss prcpttn n th Sthrn Hmsphr bt mr n th Nrthrn Hmsphr, n vntl dcln f fshrs n th Sthrn cn nd ptntl cllps f crtn mrn csystms. Whl mny ntrctc spcs rmn ndscvrd, thr r dcmntd ncrss n ntrctc flr, nd lrg fn sch s pngns r lrdy hvng dffclty rtnng stbl hbtt. n c-fr lnd, prmfrst thws rls grnhs gss nd frmrly frzn plltn.
Th Wst ntrctc c sht s lkly t cmpltly mlt nlss tmprtrs r rdcd by 2 °C (3.6 °F) blw 2020 lvls. Th lss f ths c sht wld tk btwn 500 nd 13,000 yrs. s-lvl rs f 3.3 m (10 ft 10 n) wld ccr f th c sht cllpss, lvng c cps n th mntns, nd 4.3 m (14 ft 1 n) f ths c cps ls mlt. Th fr-stblr st ntrctc c sht my nly cs s-lvl rs f 0.5 m (1 ft 8 n) – 0.9 m (2 ft 11 n) frm th crrnt lvl f wrmng, smll frctn f th 53.3 m (175 ft) cntnd n th fll c sht. Wth glbl wrmng f rnd 3 °C (5.4 °F), vlnrbl rs lk Wlks Bsn nd rr Bsn my cllps vr rnd 2,000 yrs, ptntlly ddng p t 6.4 m (21 ft 0 n) t s lvls.