气候变化领域集成服务门户(CCPortal): Early snowmelt significantly enhances boreal springtime carbon uptake

CCPortal

DOI	10.1073/pnas.1707889114
	Early snowmelt significantly enhances boreal springtime carbon uptake
	Pulliainen J.; Aurela M.; Laurila T.; Aalto T.; Takala M.; Salminen M.; Kulmala M.; Barr A.; Heimann M.; Lindroth A.; Laaksonen A.; Derksen C.; Mäkelä A.; Markkanen T.; Lemmetyinen J.; Susiluoto J.; Dengel S.; Mammarella I.; Tuovinen J.-P.; Vesala T.
发表日期	2017
ISSN	0027-8424
起始页码	11081
结束页码	11086
卷号	114 期号:42
英文摘要	We determine the annual timing of spring recovery from spaceborne microwave radiometer observations across northern hemisphere boreal evergreen forests for 1979–2014. We find a trend of advanced spring recovery of carbon uptake for this period, with a total average shift of 8.1 d (2.3 d/decade). We use this trend to estimate the corresponding changes in gross primary production (GPP) by applying in situ carbon flux observations. Micrometeoro-logical CO2 measurements at four sites in northern Europe and North America indicate that such an advance in spring recovery would have increased the January–June GPP sum by 29 g·C·m−2 [8.4 g·C·m−2 (3.7%)/decade]. We find this sensitivity of the measured springtime GPP to the spring recovery to be in accordance with the corresponding sensitivity derived from simulations with a land ecosystem model coupled to a global circulation model. The model-predicted increase in springtime cumulative GPP was 0.035 Pg/decade [15.5 g·C·m−2 (6.8%)/decade] for Eurasian forests and 0.017 Pg/decade for forests in North America [9.8 g·C·m−2 (4.4%)/decade]. This change in the springtime sum of GPP related to the timing of spring snowmelt is quantified here for boreal evergreen forests. © 2017, National Academy of Sciences. All rights reserved.
英文关键词	Carbon uptake; Earth observation; Snowmelt
语种	英语
scopus关键词	carbon; carbon dioxide; snow; Article; carbon balance; carbon sink; ecosystem; Europe; North America; Northern Hemisphere; priority journal; simulation; spring; taiga
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158888
作者单位	Pulliainen, J., Finnish Meteorological Institute, Helsinki, FIN-00101, Finland; Aurela, M., Finnish Meteorological Institute, Helsinki, FIN-00101, Finland; Laurila, T., Finnish Meteorological Institute, Helsinki, FIN-00101, Finland; Aalto, T., Finnish Meteorological Institute, Helsinki, FIN-00101, Finland; Takala, M., Finnish Meteorological Institute, Helsinki, FIN-00101, Finland; Salminen, M., Finnish Meteorological Institute, Helsinki, FIN-00101, Finland; Kulmala, M., Department of Physics, University of Helsinki, Helsinki, FI-00014, Finland; Barr, A., Climate Research Division, Environment and Climate Change Canada, Toronto, ON M3H 5T4, Canada, Global Institute for Water Security, University of Saskatchewan, Saskatoon, SK S7N 3H5, Canada; Heimann, M., Max Planck Institute for Biogeochemistry, Jena, 07701, Germany, Department of Physics, University of Helsinki, Helsinki, FI-00014, Finland; Lindroth, A., Department of Physical Geography and Ecosystems Science, Lund University, Lund, SE-22362, Sweden; L...
推荐引用方式 GB/T 7714	Pulliainen J.,Aurela M.,Laurila T.,et al. Early snowmelt significantly enhances boreal springtime carbon uptake[J],2017,114(42).
APA	Pulliainen J..,Aurela M..,Laurila T..,Aalto T..,Takala M..,...&Vesala T..(2017).Early snowmelt significantly enhances boreal springtime carbon uptake.Proceedings of the National Academy of Sciences of the United States of America,114(42).
MLA	Pulliainen J.,et al."Early snowmelt significantly enhances boreal springtime carbon uptake".Proceedings of the National Academy of Sciences of the United States of America 114.42(2017).