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The solar ultraviolet intensities of spectral lines originating from Li- andNa-like ions have been observed to surpass the expectations derived fromplasmas with coronal approximation. The violation of the coronal approximationcan be partially attributed to non-equilibrium ionization (NEI) due to dynamicprocesses occurring in the vicinity of the transition region. However, thequantitative analysis of these dynamic effects has not yet been conducted. Toinvestigate the impact of these dynamics, a set of equations governing NEI formultiple ion species was solved numerically in conjunction with 1.5-dimensionalmagnetohydrodynamic equations describing an Alfven-wave-heated coronal loop.Following the injection of Alfven waves from the photosphere, the systemundergoes a time evolution characterized by phases of evaporation,condensation, and quasi-steady states. During the evaporation phase, theionization fractions of Li- and Na-like ions were observed to increase, with amaximum enhancement of 1.6 when compared to the fractions in ionizationequilibrium. This over-fractionation of Li- and Na-like ions was found to beinduced by the evaporation process, while collisions between shocks and thetransition region did not exhibit deviations from ionization equilibrium.Consequently, the intensities calculated using the coronal approximationunderestimated the intensities of Li- and Na-like ions by up to 60%.Conversely, under-fractions of at least 0.9 was observed during thecondensation phase and the quasi-steady state. Given that the degree ofover/under-fraction exhibits a dependency on mass motions, our study has apossibility to impose limitations on both the mass circulation in coronalheating and mass loss processes.

Anomalous Enhancement of Li- and Na-Like Ions Due to Mass Circulation with Non-Equilibrium Ionization