Slide 17 of 18
In this chart we concentrate on the area between 10N 58W and 14N 58W. Low level convergence (red) between SFC-850 hPa supports upward vertical motion (upward pointing yellow arrows). However, another area of convergence above 400 hPa supports an area of subsidence. The ascending low level air mass and the descending upper level air mass meet at meed levels, where the chart shows an area of divergence between 500-700 hPa.