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	Carbon emissions induced by farmland expansion in China during the past 300 years
	Yang Xuhong; Jin Xiaobin; Xiang Xiaomin; Fan Yeting; Liu Jing; Shan Wei; Zhou Yinkang
来源期刊	Science China. Earth Sciences
ISSN	1674-7313
出版年	2019
卷号	62 期号:2 页码:423-437
英文摘要	Scientific assessment of the accounting over carbon in the terrestrial ecosystem in the process land use/land cover changes caused by human activities will help reduce the uncertainty in estimating carbon emissions from the terrestrial ecosystem.This study employs a bookkeeping model to estimate the carbon emissions from farmland reclamation in China during the past 300 years based on the annual rate of land use changes (derived from historical natural vegetation,farmland data),preset carbon density and coefficients of disturbance curves.We find out that:(1) there was a net increase of 79.30*10~4 km~2 in national farmland;about 65% of reclaimed farmland had been forest land and 26% of that had been grass land previously;(2) the total amount of carbon emissions from farmland expansion in China had been between 2.94 and 5.61 Pg with the median 3.78 Pg during the past 300 years;specifically,carbon emissions of vegetation were 1.58 Pg while those of soil ranged from 1.35 Pg to 4.03 Pg with the median 2.20 Pg;(3) carbon emissions vary greatly across various ecosystems:the emissions were most from forest land,and then grass land and swamps,and the least from shrubs;deserts functioned more likely to be carbon stock in the process of land reclamation;(4) along the time line,carbon emissions had decreased first and then increased while the peak emissions occurred in the first half of 20th century;and spatially,carbon emissions were most released in Northeast and Southwest China;Northwest China was of the minimum carbon emissions.
英文关键词	Farmland expansion Carbon emission Bookkeeping model China 300 years
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:6465543
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336083
作者单位	Yang Xuhong, School of Geographic and Oceanographic Sciences,Nanjing University, Nanjing, Jiangsu 210023, China.; Jin Xiaobin, School of Geographic and Oceanographic Sciences,Nanjing University, Nanjing, Jiangsu 210023, China.; Xiang Xiaomin, School of Geographic and Oceanographic Sciences,Nanjing University, Nanjing, Jiangsu 210023, China.; Fan Yeting, School of Geographic and Oceanographic Sciences,Nanjing University, Nanjing, Jiangsu 210023, China.; Liu Jing, School of Geographic and Oceanographic Sciences,Nanjing University, Nanjing, Jiangsu 210023, China.; Shan Wei, School of Geographic and Oceanographic Sciences,Nanjing University, Nanjing, Jiangsu 210023, China.; Zhou Yinkang, School of Geographic and Oceanographic Sciences,Nanjing University, Nanjing, Jiangsu 210023, China.
推荐引用方式 GB/T 7714	Yang Xuhong,Jin Xiaobin,Xiang Xiaomin,et al. Carbon emissions induced by farmland expansion in China during the past 300 years[J],2019,62(2):423-437.
APA	Yang Xuhong.,Jin Xiaobin.,Xiang Xiaomin.,Fan Yeting.,Liu Jing.,...&Zhou Yinkang.(2019).Carbon emissions induced by farmland expansion in China during the past 300 years.Science China. Earth Sciences,62(2),423-437.
MLA	Yang Xuhong,et al."Carbon emissions induced by farmland expansion in China during the past 300 years".Science China. Earth Sciences 62.2(2019):423-437.