气候变化领域集成服务门户(CCPortal): Weakening temperature control on the interannual variations of spring carbon uptake across northern lands

CCPortal

DOI	10.1038/NCLIMATE3277
	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.
通讯作者	Piao, SL (通讯作者)
发表日期	2017
ISSN	1758-678X
EISSN	1758-6798
起始页码	359
结束页码	+
卷号	7 期号:5
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.
关键词	ATMOSPHERIC CO2 MODEL FOREST SENSITIVITY ECOSYSTEMS PHENOLOGY DIOXIDE BALANCE SEASON BUDGET
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Environmental Studies ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000400373500017
来源期刊	NATURE CLIMATE CHANGE
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/259108
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]. 中国科学院青藏高原研究所,2017,7(5).
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,7(5).
MLA	Piao, Shilong,et al."Weakening temperature control on the interannual variations of spring carbon uptake across northern lands".NATURE CLIMATE CHANGE 7.5(2017).