Document


Title

Reconstruction of Holocene climate change using multiproxy analysis of sediments from Pyramid Lake, British Columbia, Canada
Document Type: Journal Article
Author(s): D. Mazzucchi; I. S. Spooner; Rod Gilbert; G. Osborn
Publication Year: 2003

Cataloging Information

Keyword(s):
  • Abies lasiocarpa
  • British Columbia
  • Canada
  • charcoal
  • climate change
  • fire management
  • fossils
  • lakes
  • paleoecology
  • Picea glauca
  • pollen
  • radiocarbon dating
  • sedimentation
  • subalpine fir
  • Tsuga heterophylla
  • western hemlock
  • white spruce
Region(s):
Record Maintained By:
Record Last Modified: June 1, 2018
FRAMES Record Number: 50260
Tall Timbers Record Number: 26840
TTRS Location Status: Not in file
TTRS Call Number: Not in File
TTRS Abstract Status: Okay, Fair use, Reproduced by permission

This bibliographic record was either created or modified by the Tall Timbers Research Station and Land Conservancy and is provided without charge to promote research and education in Fire Ecology. The E.V. Komarek Fire Ecology Database is the intellectual property of the Tall Timbers Research Station and Land Conservancy.

Description

Sediment cores from Pyramid Lake, an alpine tarn in the Cassiar Mountains of northwestern British Columbia, were investigated for changes in pollen, plant macro-fossils, charcoal, and clastic sediment, which are used to infer changes in climate throughout the Holocene. Radiometric dating has yielded a chronology of high-magnitude rainstorm events and timberline migration for the Pyramid Lake basin since deglaciation at about 10600 B.P. Fifteen distinct minerogenic layers represent material delivered to the lake by runoff events. The frequency of minerogenic layer deposition, and by analogy of storms, has changed throughout the Holocene. Four large-magnitude rainstorm events occurred between 4400 and 5100 B.P. During this period white spruce (Picea cf. glauca) was likely present near the lake, although a closed forest stand did not develop around the lake at any point during the Holocene. The macrofossil record indicates that subalpine fir (Abies lasiocarpa) has been present, likely as krummholz, above the elevation of the lake since at least 9400 B.P. Pollen of western hemlock (Tsuga heterophylla) is represented from ca. 1500 B.P. to the present and may be a consequence of changes in regional air-mass circulation patterns. © 2003 Regents of the University of Colorado.

Citation:
Mazzucchi, D., I. S. Spooner, R. Gilbert, and G. Osborn. 2003. Reconstruction of Holocene climate change using multiproxy analysis of sediments from Pyramid Lake, British Columbia, Canada. Arctic Antarctic and Alpine Research, v. 35, no. 4, p. 520-529.