Geography Reference
In-Depth Information
grain production is also analyzed. This will not only provide a typical case study to
the research on the global climate change, but also some reference for the
development of social industry structure.
Meanwhile, the trend of climate change and regional climate effects of Land
Use and Cover Change (LUCC) in Northeast China indicate that there will be more
complex and significant climate change in Northeast China. Which means the
change trends of temperature and precipitation were not simply increasing or
reducing by year, they were up and down and what's more, they showed different
tendencies in different seasons. Therefore, it is of great significance to study the
impacts of cultivated land reclamation on the climate and grain production in
Northeast China and the results can provide significant technical support and
policy suggestions for the development of Northeast China.
4.1.1.2 Experiment Design
In order to draw the impact on climate change of cultivated reclamation, two
simulated tests were designed in this study; control test and sensitivity test
(Table
4.1
).The two sets of test used the climate forcing data between January of
2000 and December of 2010, and the difference between them is the underlying
surface data. In the control test, the test period is from January of 2000 to
December of 2010. The land cover data of 2000 is used as underlying surface data
in the test. As to sensitivity, its test period is from January of 2030 to December of
2040. And with land cover data of 2040 as its underlying surface data. The
experiment is designed to avoid the influence of forcing data and simultaneously to
focus the impact of land use change, specially the cultivated land reclamation on
the climate variation. Thereby, the effect on grain production of the reclamation of
cultivated land in the Northeast China would be uncovered in this study.
4.1.1.3 Data and Processing
As the simulation time is January of 2000 to December of 2010 and January of
2030 to December of 2040, the underlying surface data used in this study are the
land use/cover data in 2010 and 2040 as mentioned in the experiment design
section. The former period of data is the real land use/cover data provided by Data
Center for Resources and Environmental Sciences, CAS. And the latter data is
simulated by DLS model with the land use/cover data of 1 km resolution in 1985,
1995, 2000, and 2005 as its simulated initial year data. The data of four time
periods were obtained from Data Center for Resources and Environmental Sci-
ences, CAS. The database is constructed from remote sensing digital images by the
US Landsat TM/ETM satellite with a spatial resolution of 30 by 30 m (Deng et al.
2010c
). According to the simulated results, the cultivated land reclamation data
during 2030-2040 were obtained in Northeast China (Fig.
4.2
) (Deng et al.
2010d
). According to the simulation results with the DLS model, the cultivated
