气候变化领域集成服务门户(CCPortal): Five decades of northern land carbon uptake revealed by the interhemispheric CO2 gradient

CCPortal

DOI	10.1038/s41586-019-1078-6
	Five decades of northern land carbon uptake revealed by the interhemispheric CO2 gradient
	Ciais, P.; Tan, J.; Wang, X.; Roedenbeck, C.; Chevallier, F.; Piao, S. -L.; Moriarty, R.; Broquet, G.; Le Quere, C.; Canadell, J. G.; Peng, S.; Poulter, B.; Liu, Z.; Tans, P.
通讯作者	Ciais, P (通讯作者)
发表日期	2019
ISSN	0028-0836
EISSN	1476-4687
起始页码	221
结束页码	+
卷号	568 期号:7751
英文摘要	The global land and ocean carbon sinks have increased proportionally with increasing carbon dioxide emissions during the past decades(1). It is thought that Northern Hemisphere lands make a dominant contribution to the global land carbon sink(2-7); however, the long-term trend of the northern land sink remains uncertain. Here, using measurements of the interhemispheric gradient of atmospheric carbon dioxide from 1958 to 2016, we show that the northern land sink remained stable between the 1960s and the late 1980s, then increased by 0.5 +/- 0.4 petagrams of carbon per year during the 1990s and by 0.6 +/- 0.5 petagrams of carbon per year during the 2000s. The increase of the northern land sink in the 1990s accounts for 65% of the increase in the global land carbon flux during that period. The subsequent increase in the 2000s is larger than the increase in the global land carbon flux, suggesting a coincident decrease of carbon uptake in the Southern Hemisphere. Comparison of our findings with the simulations of an ensemble of terrestrial carbon models(5,8) over the same period suggests that the decadal change in the northern land sink between the 1960s and the 1990s can be explained by a combination of increasing concentrations of atmospheric carbon dioxide, climate variability and changes in land cover. However, the increase during the 2000s is underestimated by all models, which suggests the need for improved consideration of changes in drivers such as nitrogen deposition, diffuse light and land-use change. Overall, our findings underscore the importance of Northern Hemispheric land as a carbon sink.
关键词	ATMOSPHERIC CO2 NITROGEN DEPOSITION SEASONAL EXCHANGE EMISSIONS DIOXIDE AIR TEMPERATURE PERFORMANCE SINK
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000464412700046
来源期刊	NATURE
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259658
推荐引用方式 GB/T 7714	Ciais, P.,Tan, J.,Wang, X.,et al. Five decades of northern land carbon uptake revealed by the interhemispheric CO2 gradient[J]. 中国科学院青藏高原研究所,2019,568(7751).
APA	Ciais, P..,Tan, J..,Wang, X..,Roedenbeck, C..,Chevallier, F..,...&Tans, P..(2019).Five decades of northern land carbon uptake revealed by the interhemispheric CO2 gradient.NATURE,568(7751).
MLA	Ciais, P.,et al."Five decades of northern land carbon uptake revealed by the interhemispheric CO2 gradient".NATURE 568.7751(2019).