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The structure and energy balance of the solar chromosphere remain poorlyknown. We have used the imaging spectrometer IBIS at the Dunn Solar Telescopeto obtain fast-cadence, multi-wavelength profile sampling of Halpha and Ca II854.2 nm over a sizable two-dimensional field of view encompassing quiet-Sunnetwork. We provide a first inventory of how the quiet chromosphere appears inthese two lines by comparing basic profile measurements in the form of imagedisplays, temporal-average displays, time slices, and pixel-by-pixelcorrelations. We find that the two lines can be markedly dissimilar in theirrendering of the chromosphere, but that, nevertheless, both show evidence ofchromospheric heating, particularly in and around network: Halpha in its corewidth, Ca II 854.2 in its brightness. We discuss venues for improved modeling.

The solar chromosphere at high resolution with IBIS. IV. Dual-line evidence of heating in chromospheric network