Figure S7. Daily vertical component of EP flux (which is proportional to the poleward transport of heat or upward transport of potential energy by planetary wave) at 100 hPa averaged over (top) 30°N–90°N and (bottom) 30°S–90°S for APR 2007. The EP flux unit (kg m^-1 s^-2) has been scaled by multiplying a factor of Brunt Väisällä frequency divided by Coriolis parameter and the radius of Earth. The letter 'M' indicates the current monthly mean value and the letter 'C' indicates the climatological mean value. Additionally, the normalized departures from the monthly climatological EP flux values are shown.