Figure 5
Principal component variance images and stack of spectra, 15 min after experiment start. Top: PC Score images of the first measurements show the intracell variance. Here arrows indicate the direction of the maximum spectral variations in the variance images. Below: stack of spectra (top to bottom) along the arrows. (a) First and second variance of the control cell. (b) First and second of the variance of the treated cell with low-to-high CO2 concentration. (c) Stack of the spectra along the white arrow. (d) Stack of the spectra along the red arrow. (e) Stack of the spectra along the yellow arrow.
