Earlier snowmelt may lead to late season declines in plant productivity and carbon sequestration in Arctic tundra ecosystems
Donatella Zona, Peter M. Lafleur, Koen Hufkens, Barbara Bailey, Beniamino Gioli, George Burba, Jordan P. Goodrich, A. K. Liljedahl, E. S. Euskirchen, Jennifer D. Watts, Mary Farina, John S. Kimball, Martin Heimann, Mathias Göckede, Martijn Pallandt, Torben R. Christensen, Mikhail Mastepanov, Efrèn López‐Blanco, M. Jackowicz-Korczyński, A. J. Dolman, Luca Belelli Marchesini, R. Commane, Steven C. Wofsy, Charles E. Miller, David A. Lipson, Josh Hashemi, Kyle A. Arndt, Lars Kutzbach, David Holl, Julia Boike, Christian Wille, Torsten Sachs, Aram Kalhori, Xia Song, Xiaofeng Xu, Elyn Humphreys, Charles D. Koven, Oliver Sonnentag, Gesa Meyer, Gabriel Hould Gosselin, Philip Marsh, Walter C. Oechel
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.- Cite:
- Donatella Zona, Peter M. Lafleur, Koen Hufkens, Barbara Bailey, Beniamino Gioli, George Burba, Jordan P. Goodrich, A. K. Liljedahl, E. S. Euskirchen, Jennifer D. Watts, Mary Farina, John S. Kimball, Martin Heimann, Mathias Göckede, Martijn Pallandt, Torben R. Christensen, Mikhail Mastepanov, Efrèn López‐Blanco, M. Jackowicz-Korczyński, et al.. 2022. Earlier snowmelt may lead to late season declines in plant productivity and carbon sequestration in Arctic tundra ecosystems. Scientific Reports, Volume 12, Issue 1, 12(1).
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@article{Zona-2022-Earlier,
title = "Earlier snowmelt may lead to late season declines in plant productivity and carbon sequestration in Arctic tundra ecosystems",
author = {Zona, Donatella and
Lafleur, Peter M. and
Hufkens, Koen and
Bailey, Barbara and
Gioli, Beniamino and
Burba, George and
Goodrich, Jordan P. and
Liljedahl, A. K. and
Euskirchen, E. S. and
Watts, Jennifer D. and
Farina, Mary and
Kimball, John S. and
Heimann, Martin and
G{\"o}ckede, Mathias and
Pallandt, Martijn and
Christensen, Torben R. and
Mastepanov, Mikhail and
L{\'o}pez‐Blanco, Efr{\`e}n and
Jackowicz-Korczy{\'n}ski, M. and
Dolman, A. J. and
Marchesini, Luca Belelli and
Commane, R. and
Wofsy, Steven C. and
Miller, Charles E. and
Lipson, David A. and
Hashemi, Josh and
Arndt, Kyle A. and
Kutzbach, Lars and
Holl, David and
Boike, Julia and
Wille, Christian and
Sachs, Torsten and
Kalhori, Aram and
Song, Xia and
Xu, Xiaofeng and
Humphreys, Elyn and
Koven, Charles D. and
Sonnentag, Oliver and
Meyer, Gesa and
Gosselin, Gabriel Hould and
Marsh, Philip and
Oechel, Walter C.},
journal = "Scientific Reports, Volume 12, Issue 1",
volume = "12",
number = "1",
year = "2022",
publisher = "Springer Science and Business Media LLC",
url = "https://gwf-uwaterloo.github.io/gwf-publications/G22-54002",
doi = "10.1038/s41598-022-07561-1",
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.",
}
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<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.</abstract>
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%0 Journal Article %T Earlier snowmelt may lead to late season declines in plant productivity and carbon sequestration in Arctic tundra ecosystems %A Zona, Donatella %A Lafleur, Peter M. %A Hufkens, Koen %A Bailey, Barbara %A Gioli, Beniamino %A Burba, George %A Goodrich, Jordan P. %A Liljedahl, A. K. %A Euskirchen, E. S. %A Watts, Jennifer D. %A Farina, Mary %A Kimball, John S. %A Heimann, Martin %A Göckede, Mathias %A Pallandt, Martijn %A Christensen, Torben R. %A Mastepanov, Mikhail %A López‐Blanco, Efrèn %A Jackowicz-Korczyński, M. %A Dolman, A. J. %A Marchesini, Luca Belelli %A Commane, R. %A Wofsy, Steven C. %A Miller, Charles E. %A Lipson, David A. %A Hashemi, Josh %A Arndt, Kyle A. %A Kutzbach, Lars %A Holl, David %A Boike, Julia %A Wille, Christian %A Sachs, Torsten %A Kalhori, Aram %A Song, Xia %A Xu, Xiaofeng %A Humphreys, Elyn %A Koven, Charles D. %A Sonnentag, Oliver %A Meyer, Gesa %A Gosselin, Gabriel Hould %A Marsh, Philip %A Oechel, Walter C. %J Scientific Reports, Volume 12, Issue 1 %D 2022 %V 12 %N 1 %I Springer Science and Business Media LLC %F Zona-2022-Earlier %X 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. %R 10.1038/s41598-022-07561-1 %U https://gwf-uwaterloo.github.io/gwf-publications/G22-54002 %U https://doi.org/10.1038/s41598-022-07561-1
Markdown (Informal)
[Earlier snowmelt may lead to late season declines in plant productivity and carbon sequestration in Arctic tundra ecosystems](https://gwf-uwaterloo.github.io/gwf-publications/G22-54002) (Zona et al., GWF 2022)
- Earlier snowmelt may lead to late season declines in plant productivity and carbon sequestration in Arctic tundra ecosystems (Zona et al., GWF 2022)
ACL
- Donatella Zona, Peter M. Lafleur, Koen Hufkens, Barbara Bailey, Beniamino Gioli, George Burba, Jordan P. Goodrich, A. K. Liljedahl, E. S. Euskirchen, Jennifer D. Watts, Mary Farina, John S. Kimball, Martin Heimann, Mathias Göckede, Martijn Pallandt, Torben R. Christensen, Mikhail Mastepanov, Efrèn López‐Blanco, M. Jackowicz-Korczyński, et al.. 2022. Earlier snowmelt may lead to late season declines in plant productivity and carbon sequestration in Arctic tundra ecosystems. Scientific Reports, Volume 12, Issue 1, 12(1).