A 70-80Â year periodicity identified from tree ring temperatures in Northern Scandinavia and its relation to the Arctic sea-ice oscillation AD 550-1980

Variations in the temperature estimates are explained by the results for different temporal scales. All of them show local impacts leading to differences when compared with hemispheric estimates. The long-term estimate of the temperature as derived from the present Torneträsk data is found to be biased. The source of that is unknown.