Weakening temperature control on the interannual variations of spring   carbon uptake across northern lands

doi:10.1038/NCLIMATE3277

CORC > 北京大学 > 城市与环境学院

	Weakening temperature control on the interannual variations of spring carbon uptake across northern lands
	Piao, Shilong ; Liu, Zhuo ; Wang, Tao ; Peng, Shushi ; Ciais, Philippe ; Huang, Mengtian ; Ahlstrom, Anders ; Burkhart, John F. ; Chevallier, Frederic ; Janssens, Ivan A. ; Jeong, Su-Jong ; Lin, Xin ; Mao, Jiafu ; Miller, John ; Mohammat, Anwar ; Myneni, Ranga B. ; Penuelas, Josep ; Shi, Xiaoying ; Stohl, Andreas ; Yao, Yitong ; Zhu, Zaichun ; Tans, Pieter P.
刊名	NATURE CLIMATE CHANGE
	2017
关键词	ATMOSPHERIC CO2 FOREST MODEL SENSITIVITY ECOSYSTEMS LATITUDES PHENOLOGY DIOXIDE BALANCE SEASON
DOI	10.1038/NCLIMATE3277
英文摘要	Ongoing spring warming allows the growing season to begin earlier, enhancing carbon uptake in northern ecosystems(1-3). Here we use 34 years of atmospheric CO2 concentration measurements at Barrow, Alaska (BRW, 71 degrees N) to show that the interannual relationship between spring temperature and carbon uptake has recently shifted. We use two indicators: the spring zero-crossing date of atmospheric CO2 (SZC) and the magnitude of CO2 drawdown between May and June (SCC). The previously reported strong correlation between SZC, SCC and spring land temperature (ST) was found in the first 17 years of measurements, but disappeared in the last 17 years. As a result, the sensitivity of both SZC and SCC to warming decreased. Simulations with an atmospheric transport model(4) coupled to a terrestrial ecosystem model(5) suggest that the weakened interannual correlation of SZC and SCC with ST in the last 17 years is attributable to the declining temperature response of spring net primary productivity (NPP) rather than to changes in heterotrophic respiration or in atmospheric transport patterns. Reduced chilling during dormancy and emerging light limitation are possible mechanisms that may have contributed to the loss of NPP response to ST. Our results thus challenge the 'warmer spring-bigger sink' mechanism.; National Natural Science Foundation of China [41530528]; Chinese Academy of Sciences [131C11KYSB20160061]; BELSPO STEREO project ECOPROPHET [SR00334]; 111 Project [B14001]; National Youth Top-notch Talent Support Program in China; European Research Council [ERC-2013-SyG-610028]; Regional and Global Climate Modeling Program in the CESD of the BER Program in the US Department of Energy Office of Science; DOE [DE-AC05-00OR22725]; SCI(E); SSCI; ARTICLE; 5; 359-+; 7
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/469244]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Piao, Shilong,Liu, Zhuo,Wang, Tao,et al. Weakening temperature control on the interannual variations of spring carbon uptake across northern lands[J]. NATURE CLIMATE CHANGE,2017.
APA	Piao, Shilong.,Liu, Zhuo.,Wang, Tao.,Peng, Shushi.,Ciais, Philippe.,...&Tans, Pieter P..(2017).Weakening temperature control on the interannual variations of spring carbon uptake across northern lands.NATURE CLIMATE CHANGE.
MLA	Piao, Shilong,et al."Weakening temperature control on the interannual variations of spring carbon uptake across northern lands".NATURE CLIMATE CHANGE (2017).