A major flow of seawater known as the agulhas current -- the indian ocean 's equivalent of the gulf stream -- carries warm water from the tropics toward the southern pole along the southeast coast of africa .
When the saltier , denser agulhas current water reaches the tip of south africa , most of it curls back eastward in the big indian ocean subtropical gyre , but some of it " leaks " across the tip of south africa .
She said that the waters of africa and other regions are still too few observations should be further strengthened , " agulhas stream " and the monitoring to more detailed data to provide a reference for climate change policy .