Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 43, Issue 8, Pages 3754-3761Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1002/2016GL068191
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Funding
- NASA LCLUC program [NNX11AJ35G, NNX14AD78G]
- U.S. National Science Foundation EPSCoR program [NSF-IIA-1301789]
- National Institutes of Health NIAID [1R01AI101028-01A2]
- Office Of The Director
- Office of Integrative Activities [1301789] Funding Source: National Science Foundation
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Paddy rice in monsoon Asia plays an important role in global food security and climate change. Here we documented annual dynamics of paddy rice areas in the northern frontier of Asia, including northeastern (NE) China, North Korea, South Korea, and Japan, from 2000 to 2014 through analysis of satellite images. The paddy rice area has increased by 120% (2.5 to 5.5 million ha) in NE China, in comparison to a decrease in South Korea and Japan, and the paddy rice centroid shifted northward from 41.16 degrees N to 43.70 degrees N (similar to 310 km) in this period. Market, technology, policy, and climate together drove the rice expansion in NE China. The increased use of greenhouse nurseries, improved rice cultivars, agricultural subsidy policy, and a rising rice price generally promoted northward paddy rice expansion. The potential effects of large rice expansion on climate change and ecosystem services should be paid more attention to in the future.
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