Geography Reference
In-Depth Information
40°0'0"E
45°0'0"E
50°0'0"E
55°0'0"E
Legend
Urban and Built-Up Land
Dryland Cropland and Pasture
Irrigated Cropland and Pasture
Mixed Dryland/Irrigated Cropland and Pasture
Cropland/Grassland Mosaic
Cropland/Woodland Mosaic
Grassland
Shrubland
Mixed Shrubland/Grassland
Savanna
Deciduous Broadleaf Forest
Deciduous Needleleaf Forest
Evergreen Broadleaf Forest
Evergreen Needleleaf Forest
Mixed Forest
Water Bodies
Herbaceous Wetland
Wooded Wetland
Barren or Sparsely Vegetated
Herbaceous Tundra
Wooded Tundra
Mixed Tundra
Bare Ground Tundra
Snow or Ice
60°0'0"N
60°0'0"N
55°0'0"N
55°0'0"N
45°0'0"E
50°0'0"E
55°0'0"E
Fig. 7.8
Land cover of the study area in year 2100
null hypothesis was that there was no significant difference between those two
samples, and the P value of the paired T-test was 0.91 at the significance level of
0.05, which indicated that there was no significant difference between the simu-
lated values and observations. Thus, the WRF model has the ability to simulate the
temperature change.
7.2.2 Results
7.2.2.1 Analysis of Temperature Change
As a result of the land conversion during 2000-2010, the simulated monthly
average temperature during the winter (December, January, and February)
increased in most part of the study area compared with that in year 2000
(Fig.
7.10
). The spatial pattern of the temperature change during winter is highly
related to the land cover and land cover change. The average temperature in the
winter generally increased in the regions where mainly covered by croplands or
where the boreal forest expands. In the southern part of the study area, which was
mainly covered by dryland cropland, the forests were converted into croplands;
consequently the temperature increment was relatively higher. The average tem-
perature increment generally declines as the distance to forested regions decreases.
In general, the land cover change in the study area is almost in balance from 2000
to 2010, there was very slight change of the average temperature in the winter (no
more than 0.023 C/year), and the spatial distribution of temperature change
corresponds to land use and land cover change.
