Daugherty Water for Food Global Institute

 

Authors

Donatella Zona, San Diego State University
Peter M. Lafleur, Trent University
Koen Hufkens, Centre INRAE Nouvelle-Aquitaine Bordeaux
Barbara Bailey, San Diego State University
Beniamino Gioli, Consiglio Nazionale delle Ricerche
George Burba, Daugherty Water for Food Global Institute
Jordan P. Goodrich, The University of Waikato
Anna K. Liljedahl, University of Alaska Fairbanks
Eugénie S. Euskirchen, University of Alaska Fairbanks
Jennifer D. Watts, Woodwell Climate Research Center
Mary Farina, Woodwell Climate Research Center
John S. Kimball, University of Montana
Martin Heimann, Max Planck Institute for Biogeochemistry
Mathias Göckede, Max Planck Institute for Biogeochemistry
Martijn Pallandt, Max Planck Institute for Biogeochemistry
Torben R. Christensen, Aarhus Universitet
Mikhail Mastepanov, Aarhus Universitet
Efrén López-Blanco, Aarhus Universitet
Marcin Jackowicz-Korczynski, Aarhus Universitet
Albertus J. Dolman, Royal Netherlands Institute for Sea Research - NIOZ
Luca Belelli Marchesini, Fondazione Edmund Mach
Roisin Commane, Lamont-Doherty Earth Observatory
Steven C. Wofsy, Harvard John A. Paulson School of Engineering and Applied Sciences
Charles E. Miller, Jet Propulsion Laboratory
David A. Lipson, San Diego State University
Josh Hashemi, San Diego State University
Kyle A. Arndt, University of New Hampshire Durham
Lars Kutzbach, Universität Hamburg
David Holl, Universität Hamburg
Julia Boike, Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
Christian Wille, Deutsches GeoForschungsZentrum (GFZ)
Torsten Sachs, Deutsches GeoForschungsZentrum (GFZ)
Aram Kalhori, Deutsches GeoForschungsZentrum (GFZ)
Xia Song, San Diego State University

Date of this Version

12-1-2022

Document Type

Article

Citation

Scientific Reports | (2022) 12:3986

doi:10.1038/s41598-022-07561-1

Comments

This article is licensed under a Creative Commons Attribution 4.0 International License

Abstract

Arctic warming is affecting snow cover and soil hydrology, with consequences for carbon sequestration in tundra ecosystems. The scarcity of observations in the Arctic has limited our understanding of the impact of covarying environmental drivers on the carbon balance of tundra ecosystems. In this study, we address some of these uncertainties through a novel record of 119 site-years of summer data from eddy covariance towers representing dominant tundra vegetation types located on continuous permafrost in the Arctic. Here we found that earlier snowmelt was associated with more tundra net CO2 sequestration and higher gross primary productivity (GPP) only in June and July, but with lower net carbon sequestration and lower GPP in August. Although higher evapotranspiration (ET) can result in soil drying with the progression of the summer, we did not find significantly lower soil moisture with earlier snowmelt, nor evidence that water stress affected GPP in the late growing season. Our results suggest that the expected increased CO2 sequestration arising from Arctic warming and the associated increase in growing season length may not materialize if tundra ecosystems are not able to continue sequestering CO2 later in the season.

Share

COinS