MAGNETIC-FIELD SIGNATURES OF UNEVOLVED TURBULENCE IN SOLAR POLAR FLOWS

Between late 1993 and the middle of 1994, Ulysses stayed almost consta ntly within flows from the Sun's southern polar coronal hole, travelin g from 44 degrees S to 69 degrees S heliolatitude and between 4.0 and 2.9 AU from the Sun. Magnetic field observations within this region re veal a very different medium from that at similar heliocentric distanc es near the ecliptic. Nearly 160 days of magnetic field data taken wit hin this region are studied using structure functions. We demonstrate that the polar plasma flow is turbulent, with different populations of fluctuations on different scales. On spacecraft scales of 10(2) - 10( 3) s, the fluctuations are indicative of inertial range turbulence and are intermittent, with a spectral slope near 1.7. On larger scales, t he fluctuations are not intermittent, and the spectral slope is near 1 . The similarities and differences between polar and near-ecliptic flu ctuations are discussed.