Polarward

On the polarward side of the trough, the disturbance appears as the wave in the Easterlies described by Riehl [9].

In general, the polarward flow is strongest as a result of western intensification (Stommel, 1948; Munk and Carrier, 1950).

However, during low geomagnetic activity the distribution of latitudinally asymmetric events is close to Iijima and Potermra's Region 1 and 2 current picture: the equatorward events prevail in the morning and postmidnight sectors, and the polarward ones – in the evening and premidnight.

There is, therefere, a constant tendency with the air that these upper currents carry polarward to be crowded out, so to speak — to slough off and turn back.

Continued low temperatures soon left little moisture in the air with the result that sublimation is today moving glaciers polarward all over the world.

SMW would be formed at the salinity maximum spreading both polarward and equatorward.