CLIMATIC ZONES

–     Partition of the world into three temperature classes based on kinetic averaging of monthly temperatures, & subdivision of the hottest class into predominantly wet or predominantly dry

–     Zones (Futscher & Schumacher 1972):

•      I           Temperate (21^oC/45%RH)

•      II         Subtropical (25^oC/60%RH with possibly high RH)

•      III        Hot & dry (30^oC/35%RH)

•      IV        Hot & wet (30^oC/70%RH)

–     The temperatures above are kinetic averages

–     Each nation within zone IV must now decide whether to adopt a stability test condition of          

–     30^oC & 65%RH, or

–     30^oC & 75%RH

–     ASEAN nations & Brazil have adopted 30^oC & 75%RH

Climatic Zone