《Nature》发表北京大学朴世龙、方精云等关于中国陆地生态系统中的碳平衡论文
时间：2009-04-24 阅读： 我要评论:
《Nature》发表北京大学朴世龙、方精云等关于中国陆地生态系统中的碳平衡论文
最新一期《Nature》（2009年4月23日出版）发表了北京大学朴世龙、方精云等关于中国陆地生态系统中的碳平衡文章，原文题目为《The carbon balance of terrestrial ecosystems in China》。
论文使用从卫星绿度测量推测得到的生物量和土壤碳量、生态系统模型和大气逆温等3种方法，对中国陆地上从20世纪80年代至90年代的碳平衡进行了分析，得到了相似的估计值，即中国大陆每年净接收0.19～0.26亿吨的碳，表明中国在这20年间吸收了其自身排放的、来自于化石燃料燃烧的碳中的约28～37 %，这些碳接收主要归因于该地区气候变化、大规模植树工程和植被恢复。
《Nature》同期发表了题为《Global change: China at the carbon crossroads》的Views，对该研究进行了重点评论。
其他相关信息：
Nature 458, 1009-1013 (23 April 2009) | doi:10.1038/nature07944; Received 30 June 2008; Accepted 25 February 2009
The carbon balance of terrestrial ecosystems in China
1. Department of Ecology, College of Urban and Environmental Science, and Key Laboratory for Earth Surface Processes of the Ministry of Education, Peking University, Beijing 100871, China
2. LSCE, UMR CEA-CNRS-UVSQ, Bâtiment 709, CE L'Orme des Merisiers, Gif-sur-Yvette F-91191, France
3. Laboratoire de Biogéochimie Isotopique, Bâtiment EGER, F-78026 Thiverval-Grignon, France
4. State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
5. Met Office Hadley Centre (JCHMR), Maclean Building, Wallingford OX10 8BB, UK
Correspondence to: Shilong Piao1Jingyun Fang1 Correspondence and requests for materials should be addressed to S.P. (Email: slpiao@pku.edu.cn) or J.F. (Email: jyfang@urban.pku.edu.cn).
Abstract：
Global terrestrial ecosystems absorbed carbon at a rate of 1–4 Pg yr-1 during the 1980s and 1990s, offsetting 10–60 per cent of the fossil-fuel emissions1, 2. The regional patterns and causes of terrestrial carbon sources and sinks, however, remain uncertain1, 2, 3. With increasing scientific and political interest in regional aspects of the global carbon cycle, there is a strong impetus to better understand the carbon balance of China1, 2, 3. This is not only because China is the world's most populous country and the largest emitter of fossil-fuel CO2 into the atmosphere4, but also because it has experienced regionally distinct land-use histories and climate trends1, which together control the carbon budget of its ecosystems. Here we analyse the current terrestrial carbon balance of China and its driving mechanisms during the 1980s and 1990s using three different methods: biomass and soil carbon inventories extrapolated by satellite greenness measurements, ecosystem models and atmospheric inversions. The three methods produce similar estimates of a net carbon sink in the range of 0.19–0.26 Pg carbon (PgC) per year, which is smaller than that in the conterminous United States5 but comparable to that in geographic Europe6. We find that northeast China is a net source of CO2 to the atmosphere owing to overharvesting and degradation of forests. By contrast, southern China accounts for more than 65 per cent of the carbon sink, which can be attributed to regional climate change, large-scale plantation programmes active since the 1980s and shrub recovery. Shrub recovery is identified as the most uncertain factor contributing to the carbon sink. Our data and model results together indicate that China's terrestrial ecosystems absorbed 28–37 per cent of its cumulated fossil carbon emissions during the 1980s and 1990s.
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