Dual flows and oscillations in the sunspot transition region

New knowledge about sunspot transition region lines that deviate significan tly from a Gaussian shape are presented. Attention is given to "multiple fl ows," a line profile phenomenon in which two or more distinct velocities ar e observed within the same spatial resolution element. We observe line prof iles that are well represented by two Gaussian line components in the N v l ambda 1242 and O v lambda 629 lines and introduce the notation "dual flow." We have detected transition region oscillations in one of the line compone nts in the dual-flow events.