Methods for combining phenological time series: application to bud burst in birch (Betula pendula) in Central Finland for the period 1896-1955.

@article{Hkkinen1995MethodsFC,
  title={Methods for combining phenological time series: application to bud burst in birch (Betula pendula) in Central Finland for the period 1896-1955.},
  author={Risto H{\"a}kkinen and Tapio Linkosalo and Pertti Hari},
  journal={Tree physiology},
  year={1995},
  volume={15 11},
  pages={721-6}
}
We compared four methods for combining separate fragmentary phenological time series into a single long reliable series. The systematic linear effect of differences in observers, genotypes, geography and climate at the observation points produces disturbing variation in the observations and bias in the means of some time points. The three methods based on the adjustment of individual series eliminated the disturbing variation and bias. The methods were compared based on phenological… CONTINUE READING
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