Isaac Newton once said, "I do not know what I may appear to the world, but to myself I seem to have been only like a boy playing on the sea-shore, and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me."As an explorer on physical oceanography, I am searching for the knowledge of oceanic circulation and its relevance to climate and global environment on the Earth.