Fig. 2: Timeseries and strength of the TIL (tropopause sharpness).
From: Potential impact of tropopause sharpness on the structure and strength of the general circulation
Figure shows JFM-mean squared buoyancy frequency (\({N}_{\max }^{2}\)) in s−2 averaged zonally and meridionally between 40 and 60∘N: (a) timeseries relative to climatology over the period 1951-2014, and (b) range of climatological values. Thick black line (black circle) represents ERA5 data, thick blue line represents CMIP6 multi-model-mean data, and thin light-blue lines (light-blue box-plot) represent individual CMIP6 models. Box plot is constructed the following way: light blue box represent the 25th (Q1) to 75th (Q3) percentile range, light blue whiskers represent the values that are between Q3 + 1.5IQR and Q1 − 1.5IQR (with IQR = Q3 − Q1), light blue circles represent the outliers (values outside the whiskers range), and dark blue line represents the mean (not median) value for consistency with panel (a).
