We analyze here the measurements taken by MIPAS in its middle atmosphere mode (40-102 km) during July 2005 when noctilucent clouds were observed in the summer Northern Hemisphere; and in its upper atmosphere mode (40-170 km) during the solar storm of January 2005. We show that MIPAS is able to detect the presence of noctilu- cent clouds in the summer of 2005 in the Northern Hemi- sphere from its infrared emission at 10-12 µm. In addi- tion, we also show that the emissions from NO at 5.3 µm, and from NO+ and CO2 near 4.3 µm are enormously en- hanced after the auroral precipitation taking place in the aftermath of the solar storm in January 2005. In particu- lar, the CO2 4.3 µm emission was enhanced in the 120- 170 km region even in the daytime; and the NO+ and CO2 4.3 µm emissions were severely increased at night- time, although the former never overcome the latter, as has been suggested recently.