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Fig. 5.

image

Ca II 854.2 nm line filtergrams showing the blue line wing and line core, as well as the line profile, at the time of a small cool surge. Right panel: line profiles for the EB region (solid line), the cool surge (dashed line), and the average spectrum (dash-dotted line). The EB and cool surge regions we used to construct the profiles are indicated by the boxes in the left panel.

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