Arctic summer sea ice will decline by 50 percent by the end of the 21st century, the assessment found, with some models predicting complete disappearance of summer sea ice.
1	Arctic	arctic	ADJ	JJ	Degree=Pos	4	amod	4:amod	_
2	summer	summer	NOUN	NN	Number=Sing	4	compound	4:compound	_
3	sea	sea	NOUN	NN	Number=Sing	4	compound	4:compound	_
4	ice	ice	NOUN	NN	Number=Sing	6	nsubj	6:nsubj	_
5	will	will	AUX	MD	VerbForm=Fin	6	aux	6:aux	_
6	decline	decline	VERB	VB	VerbForm=Inf	20	ccomp	20:ccomp	_
7	by	by	ADP	IN	_	9	case	9:case	_
8	50	50	NUM	CD	NumForm=Digit|NumType=Card	9	nummod	9:nummod	_
9	percent	percent	NOUN	NN	Number=Sing	6	obl	6:obl:by	_
10	by	by	ADP	IN	_	12	case	12:case	_
11	the	the	DET	DT	Definite=Def|PronType=Art	12	det	12:det	_
12	end	end	NOUN	NN	Number=Sing	6	obl	6:obl:by	_
13	of	of	ADP	IN	_	16	case	16:case	_
14	the	the	DET	DT	Definite=Def|PronType=Art	16	det	16:det	_
15	21st	21st	ADJ	JJ	Degree=Pos|NumType=Ord	16	amod	16:amod	_
16	century	century	NOUN	NN	Number=Sing	12	nmod	12:nmod:of	SpaceAfter=No
17	,	,	PUNCT	,	_	20	punct	20:punct	_
18	the	the	DET	DT	Definite=Def|PronType=Art	19	det	19:det	_
19	assessment	assessment	NOUN	NN	Number=Sing	20	nsubj	20:nsubj	_
20	found	find	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	0	root	0:root	SpaceAfter=No
21	,	,	PUNCT	,	_	20	punct	20:punct	_
22	with	with	SCONJ	IN	_	25	mark	25:mark	_
23	some	some	DET	DT	_	24	det	24:det	_
24	models	model	NOUN	NNS	Number=Plur	25	nsubj	25:nsubj	_
25	predicting	predict	VERB	VBG	VerbForm=Ger	20	advcl	20:advcl:with	_
26	complete	complete	ADJ	JJ	Degree=Pos	27	amod	27:amod	_
27	disappearance	disappearance	NOUN	NN	Number=Sing	25	obj	25:obj	_
28	of	of	ADP	IN	_	31	case	31:case	_
29	summer	summer	NOUN	NN	Number=Sing	31	compound	31:compound	_
30	sea	sea	NOUN	NN	Number=Sing	31	compound	31:compound	_
31	ice	ice	NOUN	NN	Number=Sing	27	nmod	27:nmod:of	SpaceAfter=No
32	.	.	PUNCT	.	_	20	punct	20:punct	_
