http://hdl.handle.net/10150/223899 2026-06-07T01:38:57Z 2026-06-07T01:38:57Z http://hdl.handle.net/10150/262997 2020-04-02T10:55:05Z 1982-01-01T00:00:00Z

Tree-Ring Bulletin, Volume 42 (1982) Complete issue of Tree-Ring Bulletin.

1982-01-01T00:00:00Z Revel, Richard D. http://hdl.handle.net/10150/261150 2020-04-02T10:10:02Z 1982-01-01T00:00:00Z

The Use of Scanning Electron Microscopy as a Tool in Dendrochronology Revel, Richard D.

1982-01-01T00:00:00Z Leavitt, Steven W. Long, Austin http://hdl.handle.net/10150/261129 2020-04-02T10:16:42Z 1982-01-01T00:00:00Z

Stable Carbon Isotopes as a Potential Supplemental Tool in Dendrochronology Leavitt, Steven W.; Long, Austin

1982-01-01T00:00:00Z Guiot, J. Berger, A. L. Munaut, A. V. Till, Cl. http://hdl.handle.net/10150/261139 2020-04-02T09:10:22Z 1982-01-01T00:00:00Z

Some New Mathematical Procedures in Dendroclimatology, with Examples from Switzerland and Morocco Guiot, J.; Berger, A. L.; Munaut, A. V.; Till, Cl. An original procedure and a new mathematical technique have been developed which allowed us to obtain more reliable climatic reconstructions than with prior methods. They have been tested for different sites in Switzerland and Morocco. First, cores that were too short and cores that were not coherent enough with others were excluded, using cross-spectral analysis. Second, detrending and master chronologies were calculated. Three methods were compared: polynomial, high-pass filter, and spline indexing. An optimal detrending was obtained through comparison with climate, but there seems to be no general rule for it. More reliable and longer climatic reconstructions are made possible. A response functions technique in three steps is presented: regression after extracting principal components on monthly climatic parameters, on seasonal parameters, and on more biological parameters such as potential evapotranspiration, multiple spectral regression introducing frequency domain. This procedure provides a more complete and more dynamic view of tree growth. The transfer function method and its verification are illustrated for different sites in Morocco: three climatic parameters in Tetouan (February, May, and June temperatures) and one in Marrakech (May temperature) have been successfully reconstructed. These reconstructions are confirmed by different verifications.

1982-01-01T00:00:00Z