TURBULENT TRANSPORT BY HIGHER-ORDER PARTICLE DRIFTS

It is shown that the ion polarization drift gives rise to a finite den sity flux in drift wave turbulence. A visible effect of this transport is reflected in the motion of coherent vortical structures, which res ults in strong, burst-like transport. If there is no phase shift betwe en density and potential fluctuations it is the dominant contribution to the flux, even when the E x B drift, is the dominating velocity.