Table 1.

Summary of the variables used in this study. The letters “w” and “s” after the name of the climatic variables correspond to the winter and summer sub-variables, respectively. The number after the name of the climatic variables means the amount of lag (in years) used. All variables and sub-variables were squared (_sq) and cubed (_cb)

Climatic oscillations	Original variables	Transformed variables
North Atlantic Oscillation (NAO)	NAO	NAO_sq	NAO1	NAO1_sq	NAO2	NAO2_sq	NAO3	NAO3_sq
		NAO_cb		NAO1_cb		NAO2_cb		NAO3_cb
	NAOw	NAOw_sq	NAOw1	NAOw1_sq	NAOw2	NAOw2_sq	NAOw3	NAOw3_sq
		NAOw_cb		NAOw1_cb		NAOw2_cb		NAOw3_cb
	NAOs	NAOs_sq	NAOs1	NAOs1_sq	NAOs2	NAOs2_sq	NAOs3	NAOs3_sq
		NAOs_cb		NAOs1_cb		NAOs2_cb		NAOs3_cb
Arctic Oscillation (AO)	AO	AO_sq	AO1	AO1_sq	AO2	AO2_sq	AO3	AO3_sq
		AO_cb		AO1_cb		AO2_cb		AO3_cb
	AOw	AOw_sq	AOw1	AOw1_sq	AOw2	AOw2_sq	AOw3	AOw3_sq
		AOw_cb		AOw1_cb		AOw2_cb		AOw3_cb
	AOs	AOs_sq	AOs1	AOs1_sq	AOs2	AOs2_sq	AOs3	AOs3_sq
		AOs_cb		AOs1_cb		AOs2_cb		AOs3_cb
East Atlantic pattern (EA)	EA	EA_sq	EA1	EA1_sq	EA2	EA2_sq	EA3	EA3_sq
		EA_cb		EA1_cb		EA2_cb		EA3_cb
	EAw	EAw_sq	EAw1	EAw1_sq	EAw2	EAw2_sq	EAw3	EAw3_sq
		EAw_cb		EAw1_cb		EAw2_cb		EAw3_cb
	EAs	EAs_sq	EAs1	EAs1_sq	EAs2	EAs2_sq	EAs3	EAs3_sq
		EAs_cb		EAs1_cb		EAs2_cb		EAs3_cb