This has resulted in a modest suppression of 200 mb upper tropospheric easterly wind anomalies in the tropical Atlantic, thereby increasing vertical wind shear in the western Atlantic. (realclimate.org)
Furthermore, most of the CMIP3 models project increasing levels of vertical wind shear over parts of the western tropical Atlantic (see Vecchi and Soden 2007). (gfdl.noaa.gov)
Tropical cyclones in vertical shear: impact of vertical wind shear on structure and intensity; vortex resilience theory (aoml.noaa.gov)