Reconstructed summer degree days in central Alaska and northwestern Canada since 1524

Auteurs :
JACOBY, G. C.
COOK, E. R.
ULAN, L. D.

Description :
Three time series based on precisely dated annual tree-ring widths have been used to reconstruct June plus July degree days. The reconstruction exhibits much year-to-year variation and extended warming and cooling trends including a general warming trend from about 1840 to 1960. The reconstruction is in agreement with some subarctic glacial information and with data of percentage melting from arctic ice cores. This and similar reconstructions can provide quantitative information to compare with general circulation and energy budget models for longer time periods than are available in recorded meteorological data.


Type de document :
Article de périodique

Source :
Quaternary research New York, 1985, vol. 23, n°. 1, p. 18-26, Références bibliographiques : 50 réf.

Date :
1985