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Impacts of Clear-Cutting of a Boreal Forest on Carbon Dioxide, Methane and Nitrous Oxide Fluxes

Vestin, Patrik LU ; Mölder, Meelis LU ; Kljun, Natascha LU ; Cai, Zhanzhang LU ; Hasan, Abdulghani LU ; Holst, Jutta LU ; Klemedtsson, Leif and Lindroth, Anders LU (2020) In Forests 11(9). p.961-961
Abstract
The 2015 Paris Agreement encourages stakeholders to implement sustainable forest management policies to mitigate anthropogenic emissions of greenhouse gases (GHG). The net effects of forest management on the climate and the environment are, however, still not completely understood, partially as a result of a lack of long-term measurements of GHG fluxes in managed forests.
During the period 2010–2013, we simultaneously measured carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) fluxes using the flux-gradient technique at two clear-cut plots of different degrees of wetness, located in central Sweden. The measurements started approx. one year after
clear-cutting, directly following soil scarification and planting. The study focused... (More)
The 2015 Paris Agreement encourages stakeholders to implement sustainable forest management policies to mitigate anthropogenic emissions of greenhouse gases (GHG). The net effects of forest management on the climate and the environment are, however, still not completely understood, partially as a result of a lack of long-term measurements of GHG fluxes in managed forests.
During the period 2010–2013, we simultaneously measured carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) fluxes using the flux-gradient technique at two clear-cut plots of different degrees of wetness, located in central Sweden. The measurements started approx. one year after
clear-cutting, directly following soil scarification and planting. The study focused on robust inter-plot comparisons, spatial and temporal dynamics of GHG fluxes, and the determination of the global warming potential of a clear-cut boreal forest. The clear-cutting resulted in significant emissions of
GHGs at both the wet and the dry plot. The degree of wetness determined, directly or indirectly, the relative contribution of each GHG to the total budgets. Faster establishment of vegetation on the wet plot reduced total emissions of CO2 as compared to the dry plot but this was partially offset by higher CH4 emissions. Waterlogging following clear-cutting likely caused both plots to switch from sinks to sources of CH4. In addition, there were periods with N2O uptake at the wet plot, although both plots were net sources of N2O on an annual basis. We observed clear diel patters in CO2, CH4 and N2O fluxes during the growing season at both plots, with the exception of CH4 at the dry plot. The total three-year carbon budgets were 4107 gCO2-equivalent m−2 and 5274 gCO2-equivalent m−2 at the wet and the dry plots, respectively. CO2 contributed 91.8% to the total carbon budget at the wet plot and 98.2% at the dry plot. For the only full year with N2O measurements, the total GHG
budgets were 1069.9 gCO2-eqvivalents m−2 and 1695.7 gCO2-eqvivalents m−2 at the wet and dry plot, respectively. At the wet plot, CH4 contributed 3.7%, while N2O contributed 7.3%. At the dry plot, CH4 and N2O contributed 1.5% and 7.6%, respectively. Our results emphasize the importance of considering the effects of the three GHGs on the climate for any forest management policy aiming at enhancing the mitigation potential of forests. (Less)
Abstract (Swedish)
The 2015 Paris Agreement encourages stakeholders to implement sustainable forest
management policies to mitigate anthropogenic emissions of greenhouse gases (GHG). The net
effects of forest management on the climate and the environment are, however, still not completely
understood, partially as a result of a lack of long-term measurements of GHG fluxes in managed
forests. During the period 2010–2013, we simultaneously measured carbon dioxide (CO2), methane
(CH4) and nitrous oxide (N2O) fluxes using the flux-gradient technique at two clear-cut plots of
different degrees of wetness, located in central Sweden. The measurements started approx. one
year after clear-cutting, directly following soil... (More)
The 2015 Paris Agreement encourages stakeholders to implement sustainable forest
management policies to mitigate anthropogenic emissions of greenhouse gases (GHG). The net
effects of forest management on the climate and the environment are, however, still not completely
understood, partially as a result of a lack of long-term measurements of GHG fluxes in managed
forests. During the period 2010–2013, we simultaneously measured carbon dioxide (CO2), methane
(CH4) and nitrous oxide (N2O) fluxes using the flux-gradient technique at two clear-cut plots of
different degrees of wetness, located in central Sweden. The measurements started approx. one
year after clear-cutting, directly following soil scarification and planting. The study focused on
robust inter-plot comparisons, spatial and temporal dynamics of GHG fluxes, and the
determination of the global warming potential of a clear-cut boreal forest. The clear-cutting resulted
in significant emissions of GHGs at both the wet and the dry plot. The degree of wetness determined,
directly or indirectly, the relative contribution of each GHG to the total budgets. Faster establishment
of vegetation on the wet plot reduced total emissions of CO2 as compared to the dry plot but this was
partially offset by higher CH4 emissions. Waterlogging following clear-cutting likely caused both
plots to switch from sinks to sources of CH4. In addition, there were periods with N2O uptake at the
wet plot, although both plots were net sources of N2O on an annual basis. We observed clear diel
patters in CO2, CH4 and N2O fluxes during the growing season at both plots, with the exception of
CH4 at the dry plot. The total three-year carbon budgets were 4107 gCO2-equivalent m−2 and 5274
gCO2-equivalent m−2 at the wet and the dry plots, respectively. CO2 contributed 91.8% to the total
carbon budget at the wet plot and 98.2% at the dry plot. For the only full year with N2O
measurements, the total GHG budgets were 1069.9 gCO2-eqvivalents m−2 and 1695.7
gCO2-eqvivalents m−2 at the wet and dry plot, respectively. At the wet plot, CH4 contributed 3.7%,
while N2O contributed 7.3%. At the dry plot, CH4 and N2O contributed 1.5% and 7.6%, respectively.
Our results emphasize the importance of considering the effects of the three GHGs on the climate for
any forest management policy aiming at enhancing the mitigation potential of forests. (Less)
Please use this url to cite or link to this publication:
author
; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
CO2, CH4, N2O, Greenhouse gas budget, Clear-cutting, Boreal forest, Forest management
in
Forests
volume
11
issue
9
article number
11
pages
28 pages
publisher
MDPI AG
external identifiers
  • scopus:85091230604
ISSN
1999-4907
DOI
10.3390/f11090961
language
English
LU publication?
yes
id
7b0faeaf-b9bb-42a9-b823-4953b0f7ba37
alternative location
https://www.mdpi.com/1999-4907/11/9/961
date added to LUP
2020-09-02 10:44:53
date last changed
2020-10-11 05:21:43
@article{7b0faeaf-b9bb-42a9-b823-4953b0f7ba37,
  abstract     = {The 2015 Paris Agreement encourages stakeholders to implement sustainable forest management policies to mitigate anthropogenic emissions of greenhouse gases (GHG). The net effects of forest management on the climate and the environment are, however, still not completely understood, partially as a result of a lack of long-term measurements of GHG fluxes in managed forests.<br/>During the period 2010–2013, we simultaneously measured carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) fluxes using the flux-gradient technique at two clear-cut plots of different degrees of wetness, located in central Sweden. The measurements started approx. one year after<br/>clear-cutting, directly following soil scarification and planting. The study focused on robust inter-plot comparisons, spatial and temporal dynamics of GHG fluxes, and the determination of the global warming potential of a clear-cut boreal forest. The clear-cutting resulted in significant emissions of<br/>GHGs at both the wet and the dry plot. The degree of wetness determined, directly or indirectly, the relative contribution of each GHG to the total budgets. Faster establishment of vegetation on the wet plot reduced total emissions of CO2 as compared to the dry plot but this was partially offset by higher CH4 emissions. Waterlogging following clear-cutting likely caused both plots to switch from sinks to sources of CH4. In addition, there were periods with N2O uptake at the wet plot, although both plots were net sources of N2O on an annual basis. We observed clear diel patters in CO2, CH4 and N2O fluxes during the growing season at both plots, with the exception of CH4 at the dry plot. The total three-year carbon budgets were 4107 gCO2-equivalent m−2 and 5274 gCO2-equivalent m−2 at the wet and the dry plots, respectively. CO2 contributed 91.8% to the total carbon budget at the wet plot and 98.2% at the dry plot. For the only full year with N2O measurements, the total GHG<br/>budgets were 1069.9 gCO2-eqvivalents m−2 and 1695.7 gCO2-eqvivalents m−2 at the wet and dry plot, respectively. At the wet plot, CH4 contributed 3.7%, while N2O contributed 7.3%. At the dry plot, CH4 and N2O contributed 1.5% and 7.6%, respectively. Our results emphasize the importance of considering the effects of the three GHGs on the climate for any forest management policy aiming at enhancing the mitigation potential of forests.},
  author       = {Vestin, Patrik and Mölder, Meelis and Kljun, Natascha and Cai, Zhanzhang and Hasan, Abdulghani and Holst, Jutta and Klemedtsson, Leif and Lindroth, Anders},
  issn         = {1999-4907},
  language     = {eng},
  month        = {09},
  number       = {9},
  pages        = {961--961},
  publisher    = {MDPI AG},
  series       = {Forests},
  title        = {Impacts of Clear-Cutting of a Boreal Forest on Carbon Dioxide, Methane and Nitrous Oxide Fluxes},
  url          = {http://dx.doi.org/10.3390/f11090961},
  doi          = {10.3390/f11090961},
  volume       = {11},
  year         = {2020},
}