Intertropical Convergence Zone Intertropical Convergence Zone The Intertropical Convergence Zone (ITCZ), known by sailors as the doldrums or the calms, is the area encircling Earth near the Equator, where the northeast and southeast trade winds converge. The ITCZ was originally identified from the 1920s to the 1940s as the "Intertropical Front" ("ITF"), but after the recognition in the 1940s and the 1950s of the significance of wind field convergence in tropical weather production, the term "ITCZ" was then applied. When it lies near the Equator, it is called the near-equatorial trough. Where the ITCZ is drawn into and merges with a monsoonal circulation,
The Golden Ocean is calculated; Peter understands it and succeeds in his classes on board. Before the equator, Peter gets a delirious fever, lasting until they land at Saint Catherine's island off Brazil, where they stay past Christmas. Many die of tropical diseases. Mr Ransome is friendlier with him, but still calls him Teague, an insulting name for an Irish boy. Rounding Cape Horn is fierce. They meet with high winds, thick fog, bitter cold and storms, naming several rendezvous points in the Pacific. "Pearl" rejoins after having fallen in with five Spanish ships, the fleet Peter described to Anson. In March 1741,