Geography Reference
In-Depth Information
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Fig. 5.8 Downward short wave radiation changes under different scenarios in 2030 and 2050 in
the semi-arid grassland area of China (W/m 2 ) a REG scenario in 2030, b CES scenario in 2030,
c REG scenario in 2050, d CES scenario in 2050
differences as well. The CES scenario has smaller areas within the range of
4-14 W/m 2 especially in the central regions, but larger areas within the range of
44-64 W/m 2 .
5.2.5.2 Downward Shortwave Radiation
Downward shortwave radiation is one of the significant factors influencing the
energy balance of climate system. This study simulates the downward shortwave
radiation in different periods under the REG scenario and CES scenario from 2010
to 2050. The results indicate that the downward shortwave radiation is weak in the
Inner Mongolia Autonomous Region, the northern part of Shaanxi Province, and
Ningxia Hui Autonomous Region, while it is stronger in the southeastern area of
Loess Plateau. This is because the northern part of Loess Plateau is covered mainly
by the overlapped zone of the grassland and barren or sparsely vegetated land,
while the land cover in the southeastern part is dryland cropland pasture. It can be
seen from here that the Green for Grain project will reduce the downward
shortwave radiation. However, different scenarios have different kinds of land
cover changes, so the downward shortwave radiation under two different scenarios
has significant spatial and temporal disparity.
 
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