On the crosss-pectral method the paper begins with analyzing the relationshipsbetween 6 sea areas over the North Atlantic Ocean

the North Pacific Ocean andthe Indian Ocean and 4 atmospheric active regions on 500 hpa

and reveals theirtime-space features

and after that analyses the Zime-frequency features of sea-air interaction in mid-and-low latitude

and then discusses the relations amongsubtropic anticyclones over three oceans.Some significant results are finallyobtained which provide reliable basee for analyzing long-rang weather processon sea-air relation.