Hostname: page-component-6766d58669-bkrcr Total loading time: 0 Render date: 2026-05-16T01:54:10.345Z Has data issue: false hasContentIssue false

Climate in Southwestern Ontario, Canada, between AD 1610 and 1885 Inferred from Oxygen and Hydrogen Isotopic Measurements of Wood Cellulose from Trees in Different Hydrologic Settings

Published online by Cambridge University Press:  20 January 2017

William M. Buhay
Affiliation:
Department of Earth Sciences and Waterloo Center for Groundwater Research, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
Thomas W.D. Edwards
Affiliation:
Department of Earth Sciences and Waterloo Center for Groundwater Research, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1

Abstract

Oxygen and hydrogen isotopes were measured in wood cellulose and cellulose-nitrate from trees that grew in different hydrologic settings in southwestern Ontario, Canada. An isotope model that accounts for isotopic fractionations associated with photosynthesis in plants was applied to the stable isotope data to infer past meteoric water isotopic composition and seasonal air moisture variations. The model-inferred climate data was rationalized in terms of the trees' hydrologic environment and weather characteristics of the Great Lakes region. The result is an account of summer and winter conditions in southwestern Ontario for 275 years (1610 to 1885) prior to instrumental climate records. Conditions between 1610 and 1750 are inferred to have been cooler and drier than present. This was followed by a warm-moist climate interval between 1750 and 1885 during which there was an increase in winter precipitation. Cool-dry conditions were recorded instrumentally in this region at the end of the nineteenth century.

Information

Type
Research Article
Copyright
University of Washington

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable