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

doi:10.1038/NCLIMATE3277

	Weakening temperature control on the interannual variations of spring carbon uptake across northern lands
	Ahlstrom, A (Ahlstrom, Anders)10; Piao, SL (Piao, Shilong)6,7,8; Liu, Z (Liu, Zhuo)7; Wang, T (Wang, Tao)6,8; Peng, SS (Peng, Shushi)7; Ciais, P (Ciais, Philippe)9; Huang, MT (Huang, Mengtian)7; Burkhart, JF (Burkhart, John F.)11; Chevallier, F (Chevallier, Frederic)9; Janssens, IA (Janssens, Ivan A.)12
刊名	NATURE CLIMATE CHANGE
	2017
卷号	7 期号:5 页码:359-+
关键词	ATMOSPHERIC CO2 FOREST MODEL SENSITIVITY ECOSYSTEMS LATITUDES PHENOLOGY DIOXIDE BALANCE SEASON
DOI	10.1038/NCLIMATE3277
文献子类	Article
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.
学科主题	普通生物学
WOS研究方向	Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences
语种	英语
WOS记录号	WOS:000400373500017
内容类型	期刊论文
源URL	[http://ir.itpcas.ac.cn/handle/131C11/8253]
专题	青藏高原研究所_图书馆
通讯作者	Piao, SL
作者单位	1.CREAF, Barcelona 08193, Catalonia, Spain. 2.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Urumqi 830011, Xinjiang, Peoples R China. 3.Boston Univ, Dept Earth & Environm, 675 Commonwealth Ave, Boston, MA 02215 USA. 4.NILU Norwegian Inst Air Res, POB 100, N-2027 Kjeller, Norway. 5.CREAF CEAB CSIC UAB, CSIC, Global Ecol Unit, Barcelona 08193, Catalonia, Spain. 6.Chinese Acad Sci, Key Lab Alpine Ecol & Biodivers, Inst Tibetan Plateau Res, Beijing 100085, Peoples R China. 7.Peking Univ, Sinofrench Inst Earth Syst Sci, Coll Urban & Environm Sci, Beijing 100871, Peoples R China. 8.Chinese Acad Sci, Ctr Excellence Tibetan Earth Sci, Beijing 100085, Peoples R China. 9.CEA CNRS UVSQ, Lab Sci Climat & Environm, F-91191 Gif Sur Yvette, France. 10.Stanford Univ, Sch Earth Energy & Environm Sci, Stanford, CA 94305 USA.
推荐引用方式 GB/T 7714	Ahlstrom, A ,Piao, SL ,Liu, Z ,et al. Weakening temperature control on the interannual variations of spring carbon uptake across northern lands[J]. NATURE CLIMATE CHANGE,2017,7(5):359-+.
APA	Ahlstrom, A .,Piao, SL .,Liu, Z .,Wang, T .,Peng, SS .,...&Piao, SL.(2017).Weakening temperature control on the interannual variations of spring carbon uptake across northern lands.NATURE CLIMATE CHANGE,7(5),359-+.
MLA	Ahlstrom, A ,et al."Weakening temperature control on the interannual variations of spring carbon uptake across northern lands".NATURE CLIMATE CHANGE 7.5(2017):359-+.