Journal of Paleolimnology

, Volume 10, Issue 2, pp 147–152

WACALIB version 3.3 — a computer program to reconstruct environmental variables from fossil assemblages by weighted averaging and to derive sample-specific errors of prediction

  • J. M. Line
  • Cajo J. F. ter Braak
  • H. J. B. Birks

DOI: 10.1007/BF00682511

Cite this article as:
Line, J.M., ter Braak, C.J.F. & Birks, H.J.B. J Paleolimnol (1994) 10: 147. doi:10.1007/BF00682511


A computer program for reconstructing environmental variables (e.g. lake-water pH) from fossil assemblages (e.g. diatoms) by weighted averaging regression and calibration is described. The estimation of sample-specific errors of prediction by bootstrapping is outlined. The program runs on IBM-compatible personal computers.

Key words

weighted averaging regression calibration bootstrapping maximum likelihood reconstruction error estimation 

Copyright information

© Kluwer Academic Publishers 1994

Authors and Affiliations

  • J. M. Line
    • 1
  • Cajo J. F. ter Braak
    • 2
    • 3
  • H. J. B. Birks
    • 4
    • 5
  1. 1.University of Cambridge Computer LaboratoryCambridgeUK
  2. 2.Agricultural Mathematics Group-DLOWageningenThe Netherlands
  3. 3.DLO-Institute for Forestry and Nature ResearchWageningenThe Netherlands
  4. 4.Botanical InstituteUniversity of BergenBergenNorway
  5. 5.Environmental Research CentreUniversity College LondonLondonUK

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