Geography Reference
In-Depth Information
Fig. 4.12 Simulated value of the daily average temperature in the North China Plain in February
and August
For example, the temperature difference between the Fuyang observation station in
the extreme north and the Zunhua observation station in the extreme north is as
high as 5 C in February and 2-3 C in August. While that between the Cheng-
shantou observation station in the extreme east and the Shijiazhuang observation
station in the extreme west are 1-1.5 and 0.2-0.3 C, respectively.
There is still some difference between the observed and simulated temperatures,
i.e., the simulated temperature is lower than the observed temperature on the
whole. For example, the annual daily average temperature of the 57 observation
stations is 14.19 C on average, while the simulated value is 12.74 C. According
to the monthly temperature change, the simulated value is lower than the observed
value in most months except November and December, and the maximum dif-
ference between them reaches 3.34 C in August. By contrast, the data of the
seasonal temperature change suggests the simulated temperature is lower than the
observed temperature in all seasons. The difference is the most significant in the
summer, reaching 2.68 C; while it is relatively small in the spring, autumn, and
winter, being 1.67, 0.99, and 0.44 C, respectively (Table 4.7 ).
There is also some difference in the spatial patterns of the observed and sim-
ulated temperatures (Fig. 4.13 ). In comparison with the observed temperature, the
simulated temperature is higher than in the mountainous area and lower in the
plain area. For example, there is a large difference between the observed and
simulated daily average temperature in February and August. There are 49
observation stations with the significant difference between the observed and
simulated daily average temperatures (reaching the significance level of 95 %) in
February, 39 out of which have the simulated value 2.00 C lower than the
observed value on average. While the simulated temperature of the other 10
Search WWH ::




Custom Search