  With the data from the Atmospheric Imaging Assembly (AIA) and the
Helioseismic and Magnetic Imager (HMI) on board the Solar Dynamics Observatory
(SDO), we present a magnetic interaction between an isolated coronal hole (CH)
and an emerging active region (AR). The AR emerged nearby the CH and interacted
with it. Bright loops constantly formed between them, which led to a continuous
retreat of the CH boundaries (CHBs). Meanwhile, two coronal dimmings
respectively appeared at the negative polarity of the AR and the east boundary
of the bright loops, and the AR was partly disturbed. Loop eruptions followed
by a flare occurred in the AR. The interaction was also accompanied by many
jets and an arc-shaped brightening that appeared to be observational signatures
of magnetic reconnection at the CHBs. By comparing the observations with the
derived coronal magnetic configuration, it is suggested that the interaction
between the CH and the AR excellently fitted in with the model of interchange
reconnection. It appears that our observations provide obvious evidences for
interchange reconnection.

Solar and Stellar Astrophysics