The carbon balance of a managed boreal landscape measured from a tall tower in northern Sweden
Boreal forests exchange large amounts of carbon dioxide (CO2) with the atmosphere. A managed boreal landscape usually comprises various potential CO2 sinks and sources across forest stands of varying age classes, clear-cut areas, mires, and lakes. Due to this heterogeneity and complexity, large unce...
Published in: | Agricultural and Forest Meteorology |
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ftulundlup:oai:lup.lub.lu.se:10cb77c0-683b-4cb3-aae8-bacacda29f7c 2023-05-15T17:44:28+02:00 The carbon balance of a managed boreal landscape measured from a tall tower in northern Sweden Chi, Jinshu Nilsson, Mats B. Kljun, Natascha Wallerman, Jörgen Fransson, Johan Laudon, Hjalmar Lundmark, Tomas Peichl, Matthias 2019 https://lup.lub.lu.se/record/10cb77c0-683b-4cb3-aae8-bacacda29f7c https://doi.org/10.1016/j.agrformet.2019.04.010 eng eng Elsevier https://lup.lub.lu.se/record/10cb77c0-683b-4cb3-aae8-bacacda29f7c http://dx.doi.org/10.1016/j.agrformet.2019.04.010 scopus:85067982099 Agricultural and Forest Meteorology; 274, pp 29-41 (2019) ISSN: 0168-1923 Physical Geography Forest Science Boreal landscape Tall tower eddy covariance Footprint analysis Land cover heterogeneity CO2 Flux contributiontojournal/article info:eu-repo/semantics/article text 2019 ftulundlup https://doi.org/10.1016/j.agrformet.2019.04.010 2023-02-01T23:37:37Z Boreal forests exchange large amounts of carbon dioxide (CO2) with the atmosphere. A managed boreal landscape usually comprises various potential CO2 sinks and sources across forest stands of varying age classes, clear-cut areas, mires, and lakes. Due to this heterogeneity and complexity, large uncertainties exist regarding the net CO2 balance at the landscape scale. In this study, we present the first estimate of the net CO2 exchange over a managed boreal landscape (∼68 km2) in northern Sweden, based on tall tower eddy covariance measurements. Our results suggest that from March 1, 2016 to February 28, 2018, the heterogeneous landscape was a net CO2 sink with a 2-year mean uptake of −87 ± 6 g C m−2 yr−1. Due to an earlier and warmer spring and sunnier autumn, the landscape was a stronger CO2 sink during the first year (−122 ± 8 g C m−2) compared to the second year (−52 ± 9 g C m−2). Footprint analysis shows that 87% of the CO2 flux measurements originated from forests, whereas mires, clear-cuts, lakes, and grassland contributed 11%, 1%, 0.7%, and 0.2%, respectively. Altogether, the CO2 sink strength of the heterogeneous landscape was up to 38% lower compared to the sink strength of a mature stand surrounding the tower. Overall, this study suggests that the managed boreal landscape acted as a CO2 sink and advocates tall tower eddy covariance measurements to improve regional carbon budget estimates. Article in Journal/Newspaper Northern Sweden Lund University Publications (LUP) Agricultural and Forest Meteorology 274 29 41 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Physical Geography Forest Science Boreal landscape Tall tower eddy covariance Footprint analysis Land cover heterogeneity CO2 Flux |
spellingShingle |
Physical Geography Forest Science Boreal landscape Tall tower eddy covariance Footprint analysis Land cover heterogeneity CO2 Flux Chi, Jinshu Nilsson, Mats B. Kljun, Natascha Wallerman, Jörgen Fransson, Johan Laudon, Hjalmar Lundmark, Tomas Peichl, Matthias The carbon balance of a managed boreal landscape measured from a tall tower in northern Sweden |
topic_facet |
Physical Geography Forest Science Boreal landscape Tall tower eddy covariance Footprint analysis Land cover heterogeneity CO2 Flux |
description |
Boreal forests exchange large amounts of carbon dioxide (CO2) with the atmosphere. A managed boreal landscape usually comprises various potential CO2 sinks and sources across forest stands of varying age classes, clear-cut areas, mires, and lakes. Due to this heterogeneity and complexity, large uncertainties exist regarding the net CO2 balance at the landscape scale. In this study, we present the first estimate of the net CO2 exchange over a managed boreal landscape (∼68 km2) in northern Sweden, based on tall tower eddy covariance measurements. Our results suggest that from March 1, 2016 to February 28, 2018, the heterogeneous landscape was a net CO2 sink with a 2-year mean uptake of −87 ± 6 g C m−2 yr−1. Due to an earlier and warmer spring and sunnier autumn, the landscape was a stronger CO2 sink during the first year (−122 ± 8 g C m−2) compared to the second year (−52 ± 9 g C m−2). Footprint analysis shows that 87% of the CO2 flux measurements originated from forests, whereas mires, clear-cuts, lakes, and grassland contributed 11%, 1%, 0.7%, and 0.2%, respectively. Altogether, the CO2 sink strength of the heterogeneous landscape was up to 38% lower compared to the sink strength of a mature stand surrounding the tower. Overall, this study suggests that the managed boreal landscape acted as a CO2 sink and advocates tall tower eddy covariance measurements to improve regional carbon budget estimates. |
format |
Article in Journal/Newspaper |
author |
Chi, Jinshu Nilsson, Mats B. Kljun, Natascha Wallerman, Jörgen Fransson, Johan Laudon, Hjalmar Lundmark, Tomas Peichl, Matthias |
author_facet |
Chi, Jinshu Nilsson, Mats B. Kljun, Natascha Wallerman, Jörgen Fransson, Johan Laudon, Hjalmar Lundmark, Tomas Peichl, Matthias |
author_sort |
Chi, Jinshu |
title |
The carbon balance of a managed boreal landscape measured from a tall tower in northern Sweden |
title_short |
The carbon balance of a managed boreal landscape measured from a tall tower in northern Sweden |
title_full |
The carbon balance of a managed boreal landscape measured from a tall tower in northern Sweden |
title_fullStr |
The carbon balance of a managed boreal landscape measured from a tall tower in northern Sweden |
title_full_unstemmed |
The carbon balance of a managed boreal landscape measured from a tall tower in northern Sweden |
title_sort |
carbon balance of a managed boreal landscape measured from a tall tower in northern sweden |
publisher |
Elsevier |
publishDate |
2019 |
url |
https://lup.lub.lu.se/record/10cb77c0-683b-4cb3-aae8-bacacda29f7c https://doi.org/10.1016/j.agrformet.2019.04.010 |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_source |
Agricultural and Forest Meteorology; 274, pp 29-41 (2019) ISSN: 0168-1923 |
op_relation |
https://lup.lub.lu.se/record/10cb77c0-683b-4cb3-aae8-bacacda29f7c http://dx.doi.org/10.1016/j.agrformet.2019.04.010 scopus:85067982099 |
op_doi |
https://doi.org/10.1016/j.agrformet.2019.04.010 |
container_title |
Agricultural and Forest Meteorology |
container_volume |
274 |
container_start_page |
29 |
op_container_end_page |
41 |
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1766146692312203264 |