The Variability of Arctic Sea Ice Extent from Spring to Summer and Its Linkage to the Decline of SIE in September

Table 3

Correlation analyses of the September SIE, the JJ and JA SIE with monthly NAO and AO index from 1979 to 2012. Note: correlation coefficients higher than 0.339 and 0.435 are defined as confidence levels at 95% (5) and 99% (1), respectively.

Index	SIEmonthly index	Jan	Feb	Mar	Apr	May	June	July	August	Sept
NAO	SIE in Sept	−0.091	0.085	−0.019	−0.046	0.203				−0.201
	After detrending	−0.027	0.018	−0.193	0.038	0.250		0.263	0.101
	JJ SIE	−0.139	−0.118	−0.077	0.098	−0.121			−0.326	0.190
	After detrending	−0.250	−0.080	−0.022	0.064	−0.087		−0.334	−0.145	0.222
	JA SIE	0.108	0.160		0.236	−0.015	−0.189	−0.003	−0.041	0.176
	After detrending	0.092	0.184		0.226	0.003	−0.129	0.103	0.038	0.175
AO	SIE in Sept	−0.107	−0.027	−0.250	−0.285	−0.036	0.312	0.237	0.237	−0.236
	After detrending	−0.128	−0.075	−0.236	−0.257	0.094	0.249	0.179	0.160	−0.161
	JJ SIE	−0.008	−0.012	0.034		0.041			−0.301	0.213
	After detrending	−0.048	−0.023	−0.077		−0.027			−0.245	0.132
	JA SIE	0.245	0.165		0.084	0.122	−0.125	0.031	−0.095	0.199
	After detrending	0.240	0.167		0.048	0.103	−0.082	0.070	−0.059	0.167