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Ann. For. Sci.
Volume 67, Number 8, December 2010
Article Number 800
Number of page(s) 7
Section Opinions and Comments
DOI http://dx.doi.org/10.1051/forest/2010052
Published online 29 October 2010

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Appendix A

Stop-words filtered out of the character strings extracted from the titles of our study sample.

thumbnail Appendix B

Coincidence of (A) the decreasing trend word “SO-2” and the reduction of modelled critical loads in Europe until 2005 (=grey area; Hettelingh et al., 2005), and (B) the increasing trend word “boreal” and climate warming (=grey area; IPCC, 2007). Fitted curves of relative trend word frequencies (solid symbols) and temperature anomalies (asterisks) are calculated by cubic smoothing splines (df = 4).

© INRA, EDP Sciences, 2010