Future vegetation–climate interactions in Eastern Siberia: an assessment of the competing effects of CO2 and secondary organic aerosols
Disproportional warming in the northern high latitudes and large carbon stocks in boreal and (sub)arctic ecosystems have raised concerns as to whether substantial positive climate feedbacks from biogeochemical process responses should be expected. Such feedbacks occur when increasing temperatures le...
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Online Access: | https://doi.org/10.5194/acp-16-5243-2016 https://www.atmos-chem-phys.net/16/5243/2016/ |
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ftcopernicus:oai:publications.copernicus.org:acp31997 2023-05-15T15:09:32+02:00 Future vegetation–climate interactions in Eastern Siberia: an assessment of the competing effects of CO2 and secondary organic aerosols Arneth, Almut Makkonen, Risto Olin, Stefan Paasonen, Pauli Holst, Thomas Kajos, Maija K. Kulmala, Markku Maximov, Trofim Miller, Paul A. Schurgers, Guy 2018-09-21 application/pdf https://doi.org/10.5194/acp-16-5243-2016 https://www.atmos-chem-phys.net/16/5243/2016/ eng eng doi:10.5194/acp-16-5243-2016 https://www.atmos-chem-phys.net/16/5243/2016/ eISSN: 1680-7324 Text 2018 ftcopernicus https://doi.org/10.5194/acp-16-5243-2016 2019-12-24T09:52:35Z Disproportional warming in the northern high latitudes and large carbon stocks in boreal and (sub)arctic ecosystems have raised concerns as to whether substantial positive climate feedbacks from biogeochemical process responses should be expected. Such feedbacks occur when increasing temperatures lead, for example, to a net release of CO 2 or CH 4 . However, temperature-enhanced emissions of biogenic volatile organic compounds (BVOCs) have been shown to contribute to the growth of secondary organic aerosol (SOA), which is known to have a negative radiative climate effect. Combining measurements in Eastern Siberia with model-based estimates of vegetation and permafrost dynamics, BVOC emissions, and aerosol growth, we assess here possible future changes in ecosystem CO 2 balance and BVOC–SOA interactions and discuss these changes in terms of possible climate effects. Globally, the effects of changes in Siberian ecosystem CO 2 balance and SOA formation are small, but when concentrating on Siberia and the Northern Hemisphere the negative forcing from changed aerosol direct and indirect effects become notable – even though the associated temperature response would not necessarily follow a similar spatial pattern. While our analysis does not include other important processes that are of relevance for the climate system, the CO 2 and BVOC–SOA interplay serves as an example for the complexity of the interactions between emissions and vegetation dynamics that underlie individual terrestrial processes and highlights the importance of addressing ecosystem–climate feedbacks in consistent, process-based model frameworks. Text Arctic permafrost Siberia Copernicus Publications: E-Journals Arctic Atmospheric Chemistry and Physics 16 8 5243 5262 |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
Disproportional warming in the northern high latitudes and large carbon stocks in boreal and (sub)arctic ecosystems have raised concerns as to whether substantial positive climate feedbacks from biogeochemical process responses should be expected. Such feedbacks occur when increasing temperatures lead, for example, to a net release of CO 2 or CH 4 . However, temperature-enhanced emissions of biogenic volatile organic compounds (BVOCs) have been shown to contribute to the growth of secondary organic aerosol (SOA), which is known to have a negative radiative climate effect. Combining measurements in Eastern Siberia with model-based estimates of vegetation and permafrost dynamics, BVOC emissions, and aerosol growth, we assess here possible future changes in ecosystem CO 2 balance and BVOC–SOA interactions and discuss these changes in terms of possible climate effects. Globally, the effects of changes in Siberian ecosystem CO 2 balance and SOA formation are small, but when concentrating on Siberia and the Northern Hemisphere the negative forcing from changed aerosol direct and indirect effects become notable – even though the associated temperature response would not necessarily follow a similar spatial pattern. While our analysis does not include other important processes that are of relevance for the climate system, the CO 2 and BVOC–SOA interplay serves as an example for the complexity of the interactions between emissions and vegetation dynamics that underlie individual terrestrial processes and highlights the importance of addressing ecosystem–climate feedbacks in consistent, process-based model frameworks. |
format |
Text |
author |
Arneth, Almut Makkonen, Risto Olin, Stefan Paasonen, Pauli Holst, Thomas Kajos, Maija K. Kulmala, Markku Maximov, Trofim Miller, Paul A. Schurgers, Guy |
spellingShingle |
Arneth, Almut Makkonen, Risto Olin, Stefan Paasonen, Pauli Holst, Thomas Kajos, Maija K. Kulmala, Markku Maximov, Trofim Miller, Paul A. Schurgers, Guy Future vegetation–climate interactions in Eastern Siberia: an assessment of the competing effects of CO2 and secondary organic aerosols |
author_facet |
Arneth, Almut Makkonen, Risto Olin, Stefan Paasonen, Pauli Holst, Thomas Kajos, Maija K. Kulmala, Markku Maximov, Trofim Miller, Paul A. Schurgers, Guy |
author_sort |
Arneth, Almut |
title |
Future vegetation–climate interactions in Eastern Siberia: an assessment of the competing effects of CO2 and secondary organic aerosols |
title_short |
Future vegetation–climate interactions in Eastern Siberia: an assessment of the competing effects of CO2 and secondary organic aerosols |
title_full |
Future vegetation–climate interactions in Eastern Siberia: an assessment of the competing effects of CO2 and secondary organic aerosols |
title_fullStr |
Future vegetation–climate interactions in Eastern Siberia: an assessment of the competing effects of CO2 and secondary organic aerosols |
title_full_unstemmed |
Future vegetation–climate interactions in Eastern Siberia: an assessment of the competing effects of CO2 and secondary organic aerosols |
title_sort |
future vegetation–climate interactions in eastern siberia: an assessment of the competing effects of co2 and secondary organic aerosols |
publishDate |
2018 |
url |
https://doi.org/10.5194/acp-16-5243-2016 https://www.atmos-chem-phys.net/16/5243/2016/ |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic permafrost Siberia |
genre_facet |
Arctic permafrost Siberia |
op_source |
eISSN: 1680-7324 |
op_relation |
doi:10.5194/acp-16-5243-2016 https://www.atmos-chem-phys.net/16/5243/2016/ |
op_doi |
https://doi.org/10.5194/acp-16-5243-2016 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
16 |
container_issue |
8 |
container_start_page |
5243 |
op_container_end_page |
5262 |
_version_ |
1766340710346260480 |