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TitleExtending the Place Glacier mass-balance record to AD 1585, using tree rings and wood density
AuthorWood, L J; Smith, D J; Demuth, M N
SourceQuaternary Research (New York) vol. 76, no. 3, 2011 p. 305-313,
Alt SeriesEarth Sciences Sector, Contribution Series 20090438
Mediapaper; on-line; digital
File formatpdf
ProvinceBritish Columbia
AreaPlace Glacier; Cayoosh Range
Lat/Long WENS-122.6167 -122.6000 50.4333 50.4167
Subjectssurficial geology/geomorphology; geochronology; vegetation; dendrochronology; climatology; climate; climate effects; glaciers; glacier surveys
Illustrationslocation maps; tables; graphs; plots
ProgramEarth Science for National Scale Characterization of Climate Change Impacts on Canada's Landmass, Climate Change Geoscience
AbstractRecognizing that climate influences both annual tree-ring growth and glacier mass balance, changes in the mass balance of Place Glacier, British Columbia, were documented from increment core records. Annually resolved ring-width (RW), maximum (MXD), and mean density (MD) chronologies were developed from Engelmann spruce and Douglas-fir trees sampled at sites within the surrounding region. A snowpack record dating to AD 1730 was reconstructed using a multivariate regression of spruce MD and fir RW chronologies. Spruce MXD and RW chronologies were used to reconstruct winter mass balance (Bw) for Place Glacier to AD 1585. Summer mass balance (Bs) was reconstructed using the RW chronology from spruce, and net balance was calculated from Bw and Bs. The reconstructions provide insight into the changes that snowpack and mass balance have undergone in the last 400 years, as well as identifying relationships to air temperature and circulation indices in southern British Columbia. These changes are consistent with other regional mass-balance reconstructions and indicate that the persistent weather systems characterizing large scale climate-forcing mechanisms play a significant glaciological role in this region. A comparison to dated moraine surfaces in the surrounding region substantiates that the mass-balance shifts recorded in the proxy data are evident in the response of glaciers throughout the region.