modp_NHKE_003_096_03.png: Northern Hemisphere mid-latitude (20degN-80degN)
total kinetic energy as a function of time (hour after the start of the
perturbation)

File name convention for the rest of the files:
modp_[RUNID]_[FIELD]_[HOUR].png

RUNID: 
j2: LWx0, LHx1
j7: LWx2, LHx1

FIELD:
diff_viKE: difference maps of vertically integrated kinetic energy (total kinetic energy in the column) RUNID minus CONTROL (LWx1, LHx1)

HOUR:
hour after the start of the perturbation