Learn how plants respond to higher atmospheric CO2 concentrations

How does rising atmospheric CO2 affect marine organisms?

Click to locate material archived on our website by topic


Selwyn Lake, Subarctic Canada
Reference
Tillman, P.K., Holzkamper, S., Kuhry, P., Sannel, A.B.K., Loader, N.J. and Robertson, I. 2010. Long-term climate variability in continental subarctic Canada: A 6200-year record derived from stable isotopes in peat. Palaeogeography, Palaeoclimatology, Palaeoecology 298: 235-246.

Description
Working with stable carbon isotope data obtained from α-cellulose isolated from the stems of Sphagnum fuscum moss contained within peat profiles obtained near Selwyn Lake (~59°53'N, 104°12'W) in the Canadian subarctic, with temperatures inferred from a linear model equation derived from δ13C values of the uppermost 10 cm of moss and corresponding July temperatures measured nearby over the period 1987-2004, Tillman et al. determined that "between c. 1300 and 900 cal yr BP, corresponding to a period of Mediaeval warmth, temperatures of a level similar to that experienced in the late 20th century appear to have prevailed."