1.4 Atlantic Ocean Surface Streamline Pattern

1.4 Atlantic Ocean Surface Streamline Pattern

1.4.1 January

As in the eastern Pacific, cross-equatorial flow in the Atlantic is south to north throughout the year (Fig. 2. 10). Southeasterly trade winds dominate the Southern Hemisphere tropics all year. A weak convergence zone exists near the equator in the Northern Hemisphere with northeasterly trades over much of the tropical North Atlantic. This convergence zone is largely inactive during the winter months.

1.4.2 July

The flow pattern is largely unchanged from February (Fig. 2.11). The most significant feature is the movement of the ITCZ northward to near ION. As in the eastern North Pacific, the ITCZ displays a convergent and confluent portion east and west of the col at W respectively. In the Gulf of Mexico, winter northeasterlies have been replaced by summer southeasterlies.

Section 1.3 Section 1.5

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