# 1枚目
fig1 = plt.figure()
ax = fig1.add_subplot(111)
ax.set_title('dat1')
img = ax.imshow(dat1, cmap=plt.cm.jet, interpolation='nearest', origin='upper')
cbar = fig1.colorbar(img, ax=ax, aspect=50, pad=0.08, shrink=0.9, orientation='horizontal')

# 2枚目
fig2 = plt.figure()
ax = fig2.add_subplot(111)
ax.set_title('dat2')
img = ax.imshow(dat2, cmap=plt.cm.jet, interpolation='nearest', origin='upper')
cbar = fig2.colorbar(img, ax=ax, aspect=50, pad=0.08, shrink=0.9, orientation='horizontal')

# 表示
plt.show()