The theoretical behavior of atmospheric space charge in a field of turbulent mixing is reviewed, and the possible usefulness of space charge as a tracer of the turbulent process is introduced. It is shown that power spectra of space charge recordings could serve to identify whether the charge is primarily on large or small pariticles, and previous data are found to be insufficient to verify the validity of this prediction. An instrumental ensemble is described with which to record space charge fluctuations at temporary sites. A series of measurements is described in which the only significant background variation over a 24-hour period is in the Aitken nucleus density, and this variation exhibits a cyclic pattern attributable to morning rush hour activity. The spectral decay slopes of the corresponding space charge recordings are seen to vary inversely with the Aitken density in excellent agreement with the theoretical prediction.