科技英语文章ArcticMelt Earth',however,theamountoficeintheArcticOceanfelltoarecordlow1. Normally,,theamountoficeleftbytheendofsummerhasbeendeclining. Since1979,-of-,iceintheArcticlost22percentofitsthickness--. Lastsummer,,''saverylarge23percentbelowthepreviousrecordlow, Theremaybeseveralreasonsfortheicemelt,saysJinlunZhang,,leavingalargeareaofthiniceandopenwater4. ,℃℃warmerthanthepreviousrecordhigh5. Withbothairandwatergettingwarmer,,northofAlaskaandwesternCanada,
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