National Geographic : 1984 Feb
MECHANICS OF I ADISASTER awind towa syste )RMAL weather (top diagram) sees a high ressure system (i) ed over the eastern 'ic,prompting trade s to blow "downhill" (2) rd a wet low-pressure m over Indonesia (3) and inducing a westward setting current (4). Warm waterpiles up in the western Pacific (s). Cool subsurface water returnsin an undercurrent (6); warm water layer remains shallow off South America. NationalGeographic,February1984 162 _. .