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The Hadley Centre Model
The global climate model of the Hadley Center of the United Kingdom has been used to produce maps of
transient climate maps of various meteorological variables. They have simulated (Figure 12) global mean
temperatures out to the year 2100. Their simulations of global patterns of
temperature change also show substantial increases in the 21st century, with
warming felt first in polar areas
(Figure 13) but eventually spreading over most of the globe.
Global precipitation changes Figure 14 in the Hadley model show modest increases except in the subtropical high-pressure belts (regions of deserts) early in the 21st century. As the warming proceeds in the latter part of the 21st century, moist areas become more moist and dry areas become more dry. Rainfall in the high precipitation region of the tropical Pacific Ocean, Figure 15, we noted in Unit 1-3 becomes even more intense according to the Hadley Centre prediction. Of notable consequence is decrease in rainfall in several subtropical areas currently having limited agriculture due to water shortages, such as north and southern Africa, the Middle East, India and Australia.
