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Continued Hydrothermal and Radiative Pressure on Changed Cropland in China

1
Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, Ministry of Education, Kaifeng 475004, China
2
College of Environment and Planning, Henan University, Kaifeng 475004, China
*
Author to whom correspondence should be addressed.
Sustainability 2019, 11(14), 3762; https://doi.org/10.3390/su11143762
Received: 8 June 2019 / Revised: 29 June 2019 / Accepted: 1 July 2019 / Published: 10 July 2019
(This article belongs to the Section Sustainable Agriculture, Food and Wildlife)
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Abstract

Both cropland and climate change over time, but the potential effects of climate change on cropland is currently not well understood. Here, we combined temporally and spatially explicit dynamics of cropland with air temperature, precipitation, and solar radiation datasets. China’s cropland showed a clear northward-shifting trend from 1990 to 2015. The cropland decreased south of the break line at 38° N, whereas it increased from the break line to northern regions. Correspondingly, the temperature showed a significant warming trend in the early part of the study period, which slowed down in later years. During the whole study period, both precipitation and solar radiation decreased over time, showed no significant linear characteristics, and the annual fluctuations were very large. The cropland areas in China showed a displacement characteristic with the increasing temperature, precipitation, and radiation. Overall, the cropland was shifting towards the high-temperature, low-precipitation, and low-radiation areas. The cropland dynamics indicate that they are likely to face severe drought and radiation pressure. Our findings imply that more resources such as irrigation may be needed for cropland, which will undoubtedly aggravate the agricultural water use in most northern regions, and the potential impacts on food security will further emerge in the future. View Full-Text
Keywords: global warming; northward shifting; climatic pressure; solar radiation; hydrothermal resources global warming; northward shifting; climatic pressure; solar radiation; hydrothermal resources
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Fu, Y.; Cui, Y.; Qin, Y.; Li, N.; Chen, L.; Xia, H. Continued Hydrothermal and Radiative Pressure on Changed Cropland in China. Sustainability 2019, 11, 3762.

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