Inter-annual variability of CO2 fluxes on Samoylov Island
Permafrost-affected soils in the Arctic have been accumulating organic matter for thousands of years and form a carbon storage of global relevance. Large fractions of this carbon pool may, however, be remobilized in the form of greenhouse gases through the effects of Arctic warming and permafrost de...
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Institute of Soil Science, Universität Hamburg
2021
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ftawi:oai:epic.awi.de:53941 2023-05-15T14:48:10+02:00 Inter-annual variability of CO2 fluxes on Samoylov Island Holl, David Wille, Christian Sachs, Torsten Boike, Julia Grigoriev, Mikhail Fedorova, Irina Pfeiffer, Eva-Maria Kutzbach, Lars 2021-03-25 https://epic.awi.de/id/eprint/53941/ https://hdl.handle.net/10013/epic.55e9afdc-5e9e-4f1a-b46e-5acbb960660b unknown Institute of Soil Science, Universität Hamburg Holl, D. , Wille, C. , Sachs, T. , Boike, J. orcid:0000-0002-5875-2112 , Grigoriev, M. , Fedorova, I. , Pfeiffer, E. M. and Kutzbach, L. (2021) Inter-annual variability of CO2 fluxes on Samoylov Island , International Online Symposium “Focus Siberian Permafrost”, Virtual/Online, 24 March 2021 - 25 March 2021 . hdl:10013/epic.55e9afdc-5e9e-4f1a-b46e-5acbb960660b EPIC3International Online Symposium “Focus Siberian Permafrost”, Virtual/Online, 2021-03-24-2021-03-25Institute of Soil Science, Universität Hamburg Conference notRev 2021 ftawi 2021-12-24T15:46:16Z Permafrost-affected soils in the Arctic have been accumulating organic matter for thousands of years and form a carbon storage of global relevance. Large fractions of this carbon pool may, however, be remobilized in the form of greenhouse gases through the effects of Arctic warming and permafrost degradation. Within several Russian-German cooperation projects, we have been investigating the inter-annual variability of CO2 exchange fluxes of lowland polygonal tundra on Samoylov Island in the Lena River Delta in the Siberian Arctic (72°N, 126°E) with the eddy covariance technique. Our results from field campaigns during 16 consecutive years indicate that the polygonal tundra on Samoylov Island is on average a small annual net CO2-C sink (median: -0.2 g m-2 a-1), while inter-annual variability is high (max: 25.9 g m-2 a-1; min: -23.6 g m-2 a-1). We found that annual CO2-C balance variability is best explained by the variability in NEE sums of the cold and late growing season (see Fig. 1). Additionally, cold season NEE sums increase with the Arctic Oscillation Index (AOI) and therefore vary with large scale weather patterns, where a positive AOI denotes rising influence of warm western winds from the Atlantic on Siberia. Conference Object Arctic lena river permafrost Tundra Siberia Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
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description |
Permafrost-affected soils in the Arctic have been accumulating organic matter for thousands of years and form a carbon storage of global relevance. Large fractions of this carbon pool may, however, be remobilized in the form of greenhouse gases through the effects of Arctic warming and permafrost degradation. Within several Russian-German cooperation projects, we have been investigating the inter-annual variability of CO2 exchange fluxes of lowland polygonal tundra on Samoylov Island in the Lena River Delta in the Siberian Arctic (72°N, 126°E) with the eddy covariance technique. Our results from field campaigns during 16 consecutive years indicate that the polygonal tundra on Samoylov Island is on average a small annual net CO2-C sink (median: -0.2 g m-2 a-1), while inter-annual variability is high (max: 25.9 g m-2 a-1; min: -23.6 g m-2 a-1). We found that annual CO2-C balance variability is best explained by the variability in NEE sums of the cold and late growing season (see Fig. 1). Additionally, cold season NEE sums increase with the Arctic Oscillation Index (AOI) and therefore vary with large scale weather patterns, where a positive AOI denotes rising influence of warm western winds from the Atlantic on Siberia. |
format |
Conference Object |
author |
Holl, David Wille, Christian Sachs, Torsten Boike, Julia Grigoriev, Mikhail Fedorova, Irina Pfeiffer, Eva-Maria Kutzbach, Lars |
spellingShingle |
Holl, David Wille, Christian Sachs, Torsten Boike, Julia Grigoriev, Mikhail Fedorova, Irina Pfeiffer, Eva-Maria Kutzbach, Lars Inter-annual variability of CO2 fluxes on Samoylov Island |
author_facet |
Holl, David Wille, Christian Sachs, Torsten Boike, Julia Grigoriev, Mikhail Fedorova, Irina Pfeiffer, Eva-Maria Kutzbach, Lars |
author_sort |
Holl, David |
title |
Inter-annual variability of CO2 fluxes on Samoylov Island |
title_short |
Inter-annual variability of CO2 fluxes on Samoylov Island |
title_full |
Inter-annual variability of CO2 fluxes on Samoylov Island |
title_fullStr |
Inter-annual variability of CO2 fluxes on Samoylov Island |
title_full_unstemmed |
Inter-annual variability of CO2 fluxes on Samoylov Island |
title_sort |
inter-annual variability of co2 fluxes on samoylov island |
publisher |
Institute of Soil Science, Universität Hamburg |
publishDate |
2021 |
url |
https://epic.awi.de/id/eprint/53941/ https://hdl.handle.net/10013/epic.55e9afdc-5e9e-4f1a-b46e-5acbb960660b |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic lena river permafrost Tundra Siberia |
genre_facet |
Arctic lena river permafrost Tundra Siberia |
op_source |
EPIC3International Online Symposium “Focus Siberian Permafrost”, Virtual/Online, 2021-03-24-2021-03-25Institute of Soil Science, Universität Hamburg |
op_relation |
Holl, D. , Wille, C. , Sachs, T. , Boike, J. orcid:0000-0002-5875-2112 , Grigoriev, M. , Fedorova, I. , Pfeiffer, E. M. and Kutzbach, L. (2021) Inter-annual variability of CO2 fluxes on Samoylov Island , International Online Symposium “Focus Siberian Permafrost”, Virtual/Online, 24 March 2021 - 25 March 2021 . hdl:10013/epic.55e9afdc-5e9e-4f1a-b46e-5acbb960660b |
_version_ |
1766319271814627328 |