Forests play a leading role in regional and global carbon (C) cycles. Detailed assessment of the temporal and spatial changes in C sinks/sources of China's forests is critical to the estimation of the national C b...Forests play a leading role in regional and global carbon (C) cycles. Detailed assessment of the temporal and spatial changes in C sinks/sources of China's forests is critical to the estimation of the national C budget and can help to constitute sustainable forest management policies for climate change. In this study, we explored the spatio-temporal changes in forest biomass C stocks in China between 1977 and 2008, using six periods of the national forest inventory data. According to the definition of the forest inventory, China's forest was categorized into three groups: forest stand, economic forest, and bamboo forest. We estimated forest biomass C stocks for each inventory period by using continuous biomass expansion factor (BEF) method for forest stands, and the mean biomass density method for economic and bamboo forests. As a result, China's forests have accumulated biomass C (i.e., biomass C sink) of 1896 Tg (1Tg=1012g) during the study period, with 1710, 108 and 78 Tg C in forest stands, and economic and bamboo forests, respectively. Annual forest biomass C sink was 70.2 Tg Ca-1 , offsetting 7.8% of the contemporary fossil CO2 emissions in the country. The results also showed that planted forests have functioned as a persistent C sink, sequestrating 818 Tg C and accounting for 47.8% of total C sink in forest stands, and that the old-, mid- and young-aged forests have sequestrated 930, 391 and 388 Tg C from 1977 to 2008. Our results suggest that China's forests have a big potential as biomass C sink in the future because of its large area of planted forests with young-aged growth and low C density.展开更多
随着全球气候变暖问题日益严重,竹林碳汇研究已经逐渐演化为碳汇相关研究领域的重要分支之一。本研究借助CiteSpace软件,对自《京都议定书》签订以来,Web of Science核心合集数据库中研究竹林碳汇的文献进行了回顾和梳理,结果表明:(1)...随着全球气候变暖问题日益严重,竹林碳汇研究已经逐渐演化为碳汇相关研究领域的重要分支之一。本研究借助CiteSpace软件,对自《京都议定书》签订以来,Web of Science核心合集数据库中研究竹林碳汇的文献进行了回顾和梳理,结果表明:(1)竹林碳汇研究处于快速发展期,该领域正受到越来越多学者的密切关注;(2)发文作者之间合作紧密,核心作者发文能力较强,并且已经基本形成核心作者群,核心发文机构地域集聚性明显,对该领域贡献巨大;(3)现有研究主要集中于探讨竹林碳储量、竹林固碳能力、经营模式、竹制品碳储量、竹林增汇和增收效应等方面,主要观点包括竹林有着较高的碳储量、竹林固碳能力明显高于其他树林、经营模式对竹林固碳能力具有显著影响、竹制品具有较大的替代减排潜力、竹林具备增加森林碳汇和增加农户收益的双重功效等;(4)关键词的变迁与通过竹林碳汇应对全球气候变化,以及促进竹林可持续经营密切关联。未来应该扩大竹林碳汇领域的影响力,加强现实问题的对策类研究,以挖掘竹林碳汇减排和增收的双重效应。图2表2参39。展开更多
基金supported by the National Basic Research Program of China on Global Change (2010CB950600)the National Natural Science Foundation of China (31021001, 30721140306)'Strategic Priority Research Program-Climate Change: Carbon Budget and Related Issues' of the Chinese Academy of Sciences (XDA05050503)
文摘Forests play a leading role in regional and global carbon (C) cycles. Detailed assessment of the temporal and spatial changes in C sinks/sources of China's forests is critical to the estimation of the national C budget and can help to constitute sustainable forest management policies for climate change. In this study, we explored the spatio-temporal changes in forest biomass C stocks in China between 1977 and 2008, using six periods of the national forest inventory data. According to the definition of the forest inventory, China's forest was categorized into three groups: forest stand, economic forest, and bamboo forest. We estimated forest biomass C stocks for each inventory period by using continuous biomass expansion factor (BEF) method for forest stands, and the mean biomass density method for economic and bamboo forests. As a result, China's forests have accumulated biomass C (i.e., biomass C sink) of 1896 Tg (1Tg=1012g) during the study period, with 1710, 108 and 78 Tg C in forest stands, and economic and bamboo forests, respectively. Annual forest biomass C sink was 70.2 Tg Ca-1 , offsetting 7.8% of the contemporary fossil CO2 emissions in the country. The results also showed that planted forests have functioned as a persistent C sink, sequestrating 818 Tg C and accounting for 47.8% of total C sink in forest stands, and that the old-, mid- and young-aged forests have sequestrated 930, 391 and 388 Tg C from 1977 to 2008. Our results suggest that China's forests have a big potential as biomass C sink in the future because of its large area of planted forests with young-aged growth and low C density.
文摘随着全球气候变暖问题日益严重,竹林碳汇研究已经逐渐演化为碳汇相关研究领域的重要分支之一。本研究借助CiteSpace软件,对自《京都议定书》签订以来,Web of Science核心合集数据库中研究竹林碳汇的文献进行了回顾和梳理,结果表明:(1)竹林碳汇研究处于快速发展期,该领域正受到越来越多学者的密切关注;(2)发文作者之间合作紧密,核心作者发文能力较强,并且已经基本形成核心作者群,核心发文机构地域集聚性明显,对该领域贡献巨大;(3)现有研究主要集中于探讨竹林碳储量、竹林固碳能力、经营模式、竹制品碳储量、竹林增汇和增收效应等方面,主要观点包括竹林有着较高的碳储量、竹林固碳能力明显高于其他树林、经营模式对竹林固碳能力具有显著影响、竹制品具有较大的替代减排潜力、竹林具备增加森林碳汇和增加农户收益的双重功效等;(4)关键词的变迁与通过竹林碳汇应对全球气候变化,以及促进竹林可持续经营密切关联。未来应该扩大竹林碳汇领域的影响力,加强现实问题的对策类研究,以挖掘竹林碳汇减排和增收的双重效应。图2表2参39。
