Until late 1992, the atmosphere off the west coast of southern Africa was one of the least studied regions of the planet. From a meteorological point of view, the area is devoid of any interesting weather features, including tropical storm formation and monsoonal circulations. It is dominated by a vast center of subtropical high pressure that inhibits the formation of any convective activity.
However, from an atmospheric chemistry point of view, an interesting feature was discovered in 1990 when satellite data revealed a region of enhanced tropospheric ozone off southern Africa's west coast that was at least as large as the smog plumes emanating from North America, Europe, and Asia [Fishman et al., 1990; Figure 1]. While the Northern Hemisphere high tropospheric ozone concentrations were most pronounced in the summer, the feature in the southern subtropics was highest during austral spring.
If you can't find a tool you're looking for, please click the link at the top of the page to "Go to old article view". Alternatively, view our Knowledge Base articles for additional help. Your feedback is important to us, so please let us know if you have comments or ideas for improvement.