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Peace vignette: 'cumulative since 1951' warming range is the window difference, not Total Change #148
Description
If we do it: the Peace article's warming range means what its own trend table calls cumulative. If we never do: a reader who checks it against the Total Change column finds the article understating it by about half a degree.
Problem
vignettes/peace-fwcp.Rmd:857, in Interpretation: "All five ecoregions warmed between +1.7 °C and +1.9 °C cumulative since 1951".
The article defines cumulative as "Total Change", slope × years (cd_summary(), R/cd_summary.R:82). Measured on the committed inst/vignette-data/peace_fwcp.rds, the 1.7–1.9 range is the window difference (2015–2025 mean minus 1951–1980 mean), not slope × years:
| ecoregion | window Δ (°C) | slope × years (°C) |
|---|---|---|
| OMM | 1.92 | 2.39 |
| BMP | 1.89 | 2.25 |
| CRM | 1.74 | 2.14 |
| FAB | 1.71 | 2.19 |
| NRM | 1.79 | 2.19 |
The Kootenay article had the same sentence. #146 reworded it to "warmer in 2015–2025 than in 1951–1980" and computes the range inline.
Proposed Solution
Reword it the same way and compute the range inline from vignette_data$ecoregion with cd::cd_compare(). Check the "near +0.25 °C per decade" in the same sentence too.
Found by the plan review for #146.
Activity