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  • Dendroclimatology  (2)
  • 1
    Electronic Resource
    Electronic Resource
    A tree-ring densitometric transect from Alaska to Labrador (1993)
    Springer
    International journal of biometeorology 37 (1993), S. 151-169 
    Details
    ISSN: 1432-1254
    Keywords: Dendroclimatology ; Northern North America ; Boreal zone ; Maximum latewood density ; Ring width ; Summer temperature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Abstract We describe a recently completed network of densitometric tree-ring time series representing various aspects of tree-growth for up to 200 years at 69 sites spread across the northern North American conifer zone from Yukon to Labrador. Duplicate cores, from 12 to 15 trees per site, provide time series for a suite of growth parameters including earlywood (spring), latewood (summer) and total (annual) ring widths and mean earlywood, mean latewood, minimum and maximum ring density. These data form the basis for extensive analyses of intra- and inter-site parameter comparisons and regional climate/tree-growth comparisons. Five large-scale regional chronologies do not suggest that any anomalous growth increases have occurred in recent decades, at least on these regional scales, despite the observed changes in atmospheric composition and climate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01212625
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Yearly maps of summer temperatures in Western Europe from A.D. 1750 to 1975 and Western North America from 1600 to 1982: (1991)
    Springer
    Plant ecology 92 (1991), S. 5-71 
    Details
    ISSN: 1573-5052
    Keywords: Dendroclimatology ; Maximum density ; Temperature reconstructions ; Europe ; North America ; Anomaly maps
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The primary purpose of this publication is to make available two series of historical maps showing ‘summer’ (April–September mean) temperatures over western Europe from A.D. 1750 and western North America from A.D. 1600. These maps have been reconstructed using networks of temperature-sensitive tree-ring chronologies as part of a continuing collaboration between the Swiss Federal Institute for Forest, Snow and Landscape Research (FSL) at Birmensdorf, Switzerland and the Climatic Research Unit (CRU) at the University of East Anglia, Norwich, U.K. The maps were reconstructed using relatively long maximum latewood density chronologies selected from the extensive networks of tree-ring data produced at the FSL. The reconstructions were produced using a spatial regression technique developed at CRU. The basis for the reconstructions are wood samples from various conifers growing at cool-moist sites close to the alpine or boreal timberlines. This material was analysed by x-ray densitometry and the resulting maximum latewood density chronologies were calibrated against meteorological data over a 100-year calibration period. These results emphasize the value of dendroclimatological research which can provide continentalscale reconstructions of past climate which represent a potential resource for climatologists, biologists, and historians with an interest in the spatial variability of summer temperatures over the middle to high latitudes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00047132
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    Paper (German National Licenses)
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