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The time-scales of the variabilities in changing look (CL) active galacticnuclei (AGNs) are usually at the order of years to tens of years (some of themare even shorter than one year), which are much shorter than the viscoustimescale of a standard thin accretion disk. It implies that the variabilitiesof CL AGNs cannot be reproduced by varying the mass accretion rate of the thindisk. In this work, we employ a magnetic accretion disk-outflow model tocalculate the inflow time of the disk predominantly driven by magneticoutflows. In this model, most angular momentum of the gas in the disk iscarried away by the outflows, and therefore its radial velocity can besubstantially higher than that of a conventional viscous disk. Our calculationsshow that the inflow time of such a disk with outflows can be around severalyears to tens years. The calculated spectra of the disk with outflows can fitthe observed spectra of a CL AGN Mrk 1018 quite well both in the low and highstates. The derived inflow time of such a disk with outflows is around 5 yearsin the high state, while it becomes $\sim 20$ years in the low state, which isroughly consistent with the observations of the variabilities in Mrk 1018.

A magnetic accretion disk-outflow model for changing look active galactic nuclei