Asymmetry of the Intertropical Convergence Zone it is the equatorial upwelling that prevents the ITCZ being created at the equator. To explain this simply, upwelling brings cold water to the surface, which will cool the above atmosphere and make it stable because of relative high air density due to low temperature. Thus, this area of the equator is different compared to the strong vertical convection and abundant precipitation of the ITCZ. As a result, the SST is latitudinally asymmetric. Asymmetry of the Intertropical Convergence Zone There are a number of explanations of the asymmetry of the Intertropical Convergence Zone (ITCZ), known by sailors as The Doldrums.
1987–88 South Pacific cyclone season New Zealand Meteorological Service, while the United States Joint Typhoon Warning Center and Naval Pacific Meteorology and Oceanography Center also monitored the region. During December 1987, the South Pacific Convergence Zone started to intensify as upper level westerly winds appeared near the equator, with two depressions forming near Tuvalu towards the end of December as a result. Despite the low-level conditions being ideal for the development of a tropical cyclone at this stage, the surrounding upper-level conditions were unfavourable and the depressions dissipated while still in the low-latitudes. Tropical Cyclone 04P was monitored near Tuvalu, by the JTWC and the