  Continuing our study of the role and evolution of accretion disc winds in the
microquasar GRS 1915+105, we present high-resolution spectral variability
analysis of the beta and gamma states with the Chandra High Energy Transmission
Grating Spectrometer. By tracking changes in the absorption lines from the
accretion disc wind, we find new evidence that radiation links the inner and
outer accretion discs on a range of time-scales. As the central X-ray flux
rises during the high-luminosity gamma state, we observe the progressive
over-ionization of the wind. In the beta state, we argue that changes in the
inner disc leading to the ejection of a transient 'baby jet' also quench the
highly-ionized wind from the outer disc. Our analysis reveals how the state,
structure, and X-ray luminosity of the inner accretion disc all conspire to
drive the formation and variability of highly-ionized accretion disc winds.
