Figure 11: The monthly average wind shear (m/s) in the Atlantic (ACR) and Pacific (PCR) Cyclogenesis Regions. Wind shear is defined as the difference between zonal wind speed at 200 mb and 850 mb. Black line: ERA40 reanalysis. Blue line: fvCAM2.2 () 1979–1983 average. Red line: fvCAM2.2 () 2090–2099 July–November conditions (SRES A1B).