Geography Reference
In-Depth Information
Fig. 7.27 Effects of future
urban expansion on average
monthly temperature in urban
area in the Northeast
megalopolis, USA (C)
Panel (a)
2010−2020
2040−2050
2090−2100
1
2
3
4
5
6
7
8
9
10
11
12
Month
Panel (b)
1
2
3
4
5
6
7
8
9
10
11
12
Month
Along with urban expansion in the periods of 2040-2050 and 2090-2100, the
cooling effect will be underscored, which can be referred to the enhancement of
UHI effect. The urban expansion during these two periods will result in an average
monthly temperature increase from February to October and decrease in other
three months. The average monthly temperature increase in June and July in
original urban area will exceed 0.4 C in the period of 2090-2100 due to urban
expansion. On the whole, the future urban expansion will lead to an average
monthly temperature increase in original urban area.
The warming effect of future urban expansion in new urban area will be more
significant than that in original urban area, especially in summer (Fig. 7.27 , Panel
B). In June, the average monthly temperature increase by 1.92, 3.16 and 3.59 Cin
new urban area in the period of 2010-2010, 2040-2050 and 2090-2100, respec-
tively. There will be also cooling effect in new urban area in November,
December, and January during the period of 2010-2020. The differences of
average monthly temperature among the three simulation periods indicate that the
UHI effect in new urban area will be enhanced along with urban expansion.
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