Relative variation of ionic composition in a karstic lake under the theory of unweighted vs weighted logratio analysis


ÇANKAYA E., Sivaci E. R. , KILINÇ S. , Dere S.

HYDROLOGY RESEARCH, vol.39, no.1, pp.55-62, 2008 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 39 Issue: 1
  • Publication Date: 2008
  • Doi Number: 10.2166/nh.2008.029
  • Title of Journal : HYDROLOGY RESEARCH
  • Page Numbers: pp.55-62

Abstract

The use of logratio analysis in limnological studies has proved to be effective for solving the problems of the constrained nature of compositional data. The method offers a graphical tool, the relative variation biplot, to explore relative changes of the ions. However, recent methodological developments have shown that the results can be perturbed by low-valued ions with high variances and proposed downweighting their influences as in correspondence analysis. Additional to all properties of the unweighted version, this weighted logratio analysis extends the previous work and has the advantage of the principle of distributional equivalence.