Heating rates measured by EISCAT: latitudinal variations

Data from EISCAT are used to determine Joule and particle heating rates. As CP3 programs include scans in the meridian plane of Tromsø, some latitudinal extents of these rates are deduced. They are shown for a period of 24 h on 18–19 January 1984.If a linear relationship is assumed between height-integrated Joule heating rates and variations of the horizontal component of the magnetic field at ground level, the corresponding scaling factor depends on a certain ratio of the conductivities. Variations of this ratio versus time and latitude are shown for the same period.