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The Holocene
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A 930-year ring-width chronology from moisture-sensitive white spruce (Picea glauca Moench) in northwestern Canada

Julian M. Szeicz

Department of Geography, McMaster University, Hamilton, Ontario, L8S 4K1, Canada

Glen M. MacDonald

Department of Geography, McMaster University, Hamilton, Ontario, L8S 4K1, Canada

A 930-year tree-ring chronology was constructed from living and subfossil white spruce (Picea glauca Moench) from the Campbell Dolomite Upland, Northwest Territories, Canada. Response function analy sis using climate data from nearby Inuvik indicates that 69% of the variation in ring widths can be explained by monthly precipitation and temperature. Ring width is most strongly correlated with high precipitation between February and May. There is also a significant negative relationship between ring widths and tempera tures during the previous growing season. Periods of slow radial growth at AD 1820-1855, 1700-1710, 1585- 1610, 1395-1405, 1260-1300 and 1125-1170 are assumed to be associated with times of increased moisture stress. Periods of rapid growth at AD 1925-1940, 1770-1780, 1725-1740, 1510-1560, 1215-1260 and 1185- 1205 likely reflect higher precipitation and/or decreased moisture stress. This chronology is the oldest yet published from northwestern Canada and the first that provides a dendrohydrological record.

Key Words: Dendrochronology • dendrohydrology • Picea glauca • white spruce • response function • precipitation • moisture stress • Northwest Territories • Canada.

The Holocene, Vol. 6, No. 3, 345-351 (1996)
DOI: 10.1177/095968369600600309
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