Fig. 4: Climatology and anomaly of zonal wind at 850 hPa pressure level during October to March.
From: Humidification of Central Asia and equatorward shifts of westerly winds since the late Pliocene
a Climatology zonal wind (u-component) based on the last 100 years of the AWI-ESM 568 ppmv CO2 experiment. Positive values represent westerly wind, and negative values represent easterly wind. The right panel shows the mean zonal wind in this experiment. b Zonal wind anomaly in the AWI-ESM 284 ppmv experiment with respect to the 568 ppmv CO2 experiment (i.e., Exp284–Exp568). The right panel shows the mean zonal wind in the Exp284 (blue line) and Exp568 (red line) experiments. An equatorward shift of the westerly jet can be identified in the low-CO2 experiment. Gray contours represent zero-crossing of the climatology zonal wind from easterly to westerly. The gray stippling indicates areas where the anomalies are statistically significant (two tailed Student’s t-test). The pink circle indicates the location of crust CM3D18.
