Brewer–Dobson Circulation: Recent-Past and Near-Future Trends Simulated by Chemistry-Climate Models

Figure 1

Trends (color fill; units: 10⁻² mm s⁻¹ decade⁻¹) and climatologies (contours; units: 10⁻³ mm s⁻¹) of annual mean derived from the CCMs’ ensemble mean over the periods (a) 1960–2000 and (b) 2001–2050. The contour interval for the climatological is 0.2 × 10⁻³ mm s⁻¹. Solid and dashed lines represent positive and negative contours, respectively. Stippled regions show the trends significant at the 90% level.

(a) [1960–2000]

(b) [2001–2050]