Modelling growing season carbon fluxes at a low-center polygon ecosystem in the Mackenzie River Delta
A temporal upscaling study was conducted to estimate net ecosystem exchange (NEE) of carbon dioxide and net methane exchange (NME) for a low-center polygon (LCP) ecosystem in the Mackenzie River Delta, for each of the 11 growing seasons (2009–2019). We used regression models to create a time series...
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2023
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ftunivfreiburg:oai:freidok.uni-freiburg.de:238869 2023-10-09T21:49:40+02:00 Modelling growing season carbon fluxes at a low-center polygon ecosystem in the Mackenzie River Delta Skeeter, June Christen, Andreas Henry, Greg 2023 pdf https://freidok.uni-freiburg.de/data/238869 https://nbn-resolving.org/urn:nbn:de:bsz:25-freidok-2388691 https://doi.org/10.1139/as-2022-0033 https://freidok.uni-freiburg.de/dnb/download/238869 eng eng https://freidok.uni-freiburg.de/data/238869 free ISSN: 2368-7460 Arktisforschung Tundra Klimatologie Methan Kohlendioxid Treibhausgas CO2-Bilanz article 2023 ftunivfreiburg https://doi.org/10.1139/as-2022-0033 2023-09-24T22:52:11Z A temporal upscaling study was conducted to estimate net ecosystem exchange (NEE) of carbon dioxide and net methane exchange (NME) for a low-center polygon (LCP) ecosystem in the Mackenzie River Delta, for each of the 11 growing seasons (2009–2019). We used regression models to create a time series of flux drivers from in situ weather observations (2009–2019) combined with ERA5 reanalysis and satellite data. We then used neural networks that were trained and validated on a single growing season (2017) of eddy covariance data to model NEE and NME over each growing season. The study indicates growing season NEE was negative (net uptake) and NME was positive (net emission) in this LCP ecosystem. Cumulative carbon (C) uptake was estimated to be −46.7 g C m−2 (CI95% ± 45.3) per growing season, with methane emissions offsetting an average 5.6% of carbon dioxide uptake (in g C m−2) per growing season. High air temperatures (>15 °C) reduced daily CO2 uptake and cumulative NEE was positively correlated with mean air growing season temperatures. Cumulative NME was positively correlated with the length of the growing season. Our analysis suggests warmer climate conditions may reduce carbon uptake in this LCP ecosystem. Article in Journal/Newspaper Arktis* Mackenzie river Tundra University of Freiburg: FreiDok Mackenzie River Arctic Science |
institution |
Open Polar |
collection |
University of Freiburg: FreiDok |
op_collection_id |
ftunivfreiburg |
language |
English |
topic |
Arktisforschung Tundra Klimatologie Methan Kohlendioxid Treibhausgas CO2-Bilanz |
spellingShingle |
Arktisforschung Tundra Klimatologie Methan Kohlendioxid Treibhausgas CO2-Bilanz Skeeter, June Christen, Andreas Henry, Greg Modelling growing season carbon fluxes at a low-center polygon ecosystem in the Mackenzie River Delta |
topic_facet |
Arktisforschung Tundra Klimatologie Methan Kohlendioxid Treibhausgas CO2-Bilanz |
description |
A temporal upscaling study was conducted to estimate net ecosystem exchange (NEE) of carbon dioxide and net methane exchange (NME) for a low-center polygon (LCP) ecosystem in the Mackenzie River Delta, for each of the 11 growing seasons (2009–2019). We used regression models to create a time series of flux drivers from in situ weather observations (2009–2019) combined with ERA5 reanalysis and satellite data. We then used neural networks that were trained and validated on a single growing season (2017) of eddy covariance data to model NEE and NME over each growing season. The study indicates growing season NEE was negative (net uptake) and NME was positive (net emission) in this LCP ecosystem. Cumulative carbon (C) uptake was estimated to be −46.7 g C m−2 (CI95% ± 45.3) per growing season, with methane emissions offsetting an average 5.6% of carbon dioxide uptake (in g C m−2) per growing season. High air temperatures (>15 °C) reduced daily CO2 uptake and cumulative NEE was positively correlated with mean air growing season temperatures. Cumulative NME was positively correlated with the length of the growing season. Our analysis suggests warmer climate conditions may reduce carbon uptake in this LCP ecosystem. |
format |
Article in Journal/Newspaper |
author |
Skeeter, June Christen, Andreas Henry, Greg |
author_facet |
Skeeter, June Christen, Andreas Henry, Greg |
author_sort |
Skeeter, June |
title |
Modelling growing season carbon fluxes at a low-center polygon ecosystem in the Mackenzie River Delta |
title_short |
Modelling growing season carbon fluxes at a low-center polygon ecosystem in the Mackenzie River Delta |
title_full |
Modelling growing season carbon fluxes at a low-center polygon ecosystem in the Mackenzie River Delta |
title_fullStr |
Modelling growing season carbon fluxes at a low-center polygon ecosystem in the Mackenzie River Delta |
title_full_unstemmed |
Modelling growing season carbon fluxes at a low-center polygon ecosystem in the Mackenzie River Delta |
title_sort |
modelling growing season carbon fluxes at a low-center polygon ecosystem in the mackenzie river delta |
publishDate |
2023 |
url |
https://freidok.uni-freiburg.de/data/238869 https://nbn-resolving.org/urn:nbn:de:bsz:25-freidok-2388691 https://doi.org/10.1139/as-2022-0033 https://freidok.uni-freiburg.de/dnb/download/238869 |
geographic |
Mackenzie River |
geographic_facet |
Mackenzie River |
genre |
Arktis* Mackenzie river Tundra |
genre_facet |
Arktis* Mackenzie river Tundra |
op_source |
ISSN: 2368-7460 |
op_relation |
https://freidok.uni-freiburg.de/data/238869 |
op_rights |
free |
op_doi |
https://doi.org/10.1139/as-2022-0033 |
container_title |
Arctic Science |
_version_ |
1779312697607716864 |