Fig. 2: Effect of weakening CO2 uptake on the alpha-pinene chiral ratio.
From: Mirror image molecules expose state of rainforest stress
Diurnal cycles for each measurement period showing median mixing ratios for (−)-alpha-pinene, (+)-alpha-pinene, and alpha-pinene chiral ratio. a January 2023. b October 2023. c April–May 2024. d October 2024. At 12:30 and 23:00, total alpha-pinene was measured with a non-chiral method and the chiral ratio was calculated from subtracting the median (+)-alpha-pinene of the adjacent time periods from the total measured alpha-pinene. These time periods are indicated by * (see “methods” for details). Diurnal cycles for each measurement period showing differences between the CO2 mixing ratios at 24 m and 0.5 m (ΔCO2), and the median alpha-pinene chiral ratio. The shaded region represents the 25th and 75th percentiles. e January 2023. f October 2023. g April–May 2024. h October 2024. A composite figure of the chiral ratio diurnal cycles for each period is given in Supplementary Fig. 3. Diurnal cycles of median temperature measured at 26 m and PAR measured at 81 m, shaded regions around the median lines show the 25th and 75th percentiles. i. January 2023. j October 2023. k April–May 2024. l October 2024.
