Scaling carbon fluxes from eddy covariance sites to globe: Synthesis and evaluation of the FLUXCOM approach
| Autor(a) principal: | |
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| Data de Publicação: | 2020 |
| Outros Autores: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
| Tipo de documento: | Artigo |
| Idioma: | eng |
| Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
| Texto Completo: | http://hdl.handle.net/10362/119435 |
Resumo: | This research has been supported by the European Space Agency (grant no. ESRIN/4000123002/18/I-NB), the National Science Foundation under cooperative agreement no. 1852977 and the U.S. Department of Energy (no. DE-SC0016323) |
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Scaling carbon fluxes from eddy covariance sites to globe: Synthesis and evaluation of the FLUXCOM approachEcology, Evolution, Behavior and SystematicsEarth-Surface ProcessesSDG 15 - Life on LandThis research has been supported by the European Space Agency (grant no. ESRIN/4000123002/18/I-NB), the National Science Foundation under cooperative agreement no. 1852977 and the U.S. Department of Energy (no. DE-SC0016323)FLUXNET comprises globally distributed eddy-covariance-based estimates of carbon fluxes between the biosphere and the atmosphere. Since eddy covariance flux towers have a relatively small footprint and are distributed unevenly across the world, upscaling the observations is necessary to obtain global-scale estimates of biosphere-atmosphere exchange. Based on cross-consistency checks with atmospheric inversions, sun-induced fluorescence (SIF) and dynamic global vegetation models (DGVMs), here we provide a systematic assessment of the latest upscaling efforts for gross primary production (GPP) and net ecosystem exchange (NEE) of the FLUXCOM initiative, where different machine learning methods, forcing data sets and sets of predictor variables were employed. Spatial patterns of mean GPP are consistent across FLUXCOM and DGVM ensembles ( at 1 spatial resolution) while the majority of DGVMs show, for 70 of the land surface, values outside the FLUXCOM range. Global mean GPP magnitudes for 2008-2010 from FLUXCOM members vary within 106 and 130 PgC class with the largest uncertainty in the tropics. Seasonal variations in independent SIF estimates agree better with FLUXCOM GPP (mean global pixel-wise) than with GPP from DGVMs (mean global pixel-wise). Seasonal variations in FLUXCOM NEE show good consistency with atmospheric inversion-based net land carbon fluxes, particularly for temperate and boreal regions. Interannual variability of global NEE in FLUXCOM is underestimated compared to inversions and DGVMs. The FLUXCOM version which also uses meteorological inputs shows a strong co-variation in interannual patterns with inversions (for 2001-2010). Mean regional NEE from FLUXCOM shows larger uptake than inversion and DGVM-based estimates, particularly in the tropics with discrepancies of up to several hundred grammes of carbon per square metre per year. These discrepancies can only partly be reconciled by carbon loss pathways that are implicit in inversions but not captured by the flux tower measurements such as carbon emissions from fires and water bodies. We hypothesize that a combination of systematic biases in the underlying eddy covariance data, in particular in tall tropical forests, and a lack of site history effects on NEE in FLUXCOM are likely responsible for the too strong tropical carbon sink estimated by FLUXCOM. Furthermore, as FLUXCOM does not account for fertilization effects, carbon flux trends are not realistic. Overall, current FLUXCOM estimates of mean annual and seasonal cycles of GPP as well as seasonal NEE variations provide useful constraints of global carbon cycling, while interannual variability patterns from FLUXCOM are valuable but require cautious interpretation. Exploring the diversity of Earth observation data and of machine learning concepts along with improved quality and quantity of flux tower measurements will facilitate further improvements of the FLUXCOM approach overall.DCEA - Departamento de Ciências e Engenharia do AmbienteRUNJung, MartinSchwalm, ChristopherMigliavacca, MircoWalther, SophiaCamps-Valls, GustauKoirala, SujanAnthoni, PeterBesnard, SimonBodesheim, PaulCarvalhais, NunoChevallier, FredericGans, FabianGoll, Daniel S.Haverd, VanessaKöhler, PhilippIchii, KazuhitoJain, Atul K.Liu, JunzhiLombardozzi, DanicaNabel, Julia E. M. S.Nelson, Jacob A.O'Sullivan, MichaelPallandt, MartijnPapale, DarioPeters, WouterPongratz, JuliaRödenbeck, ChristianSitch, StephenTramontana, GianlucaWalker, AnthonyWeber, UlrichReichstein, Markus2021-06-16T22:21:10Z2020-03-162020-03-16T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article23application/pdfhttp://hdl.handle.net/10362/119435eng1726-4170PURE: 32002528https://doi.org/10.5194/bg-17-1343-2020info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-03-11T05:02:00Zoai:run.unl.pt:10362/119435Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:44:05.188334Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
| dc.title.none.fl_str_mv |
Scaling carbon fluxes from eddy covariance sites to globe: Synthesis and evaluation of the FLUXCOM approach |
| title |
Scaling carbon fluxes from eddy covariance sites to globe: Synthesis and evaluation of the FLUXCOM approach |
| spellingShingle |
Scaling carbon fluxes from eddy covariance sites to globe: Synthesis and evaluation of the FLUXCOM approach Jung, Martin Ecology, Evolution, Behavior and Systematics Earth-Surface Processes SDG 15 - Life on Land |
| title_short |
Scaling carbon fluxes from eddy covariance sites to globe: Synthesis and evaluation of the FLUXCOM approach |
| title_full |
Scaling carbon fluxes from eddy covariance sites to globe: Synthesis and evaluation of the FLUXCOM approach |
| title_fullStr |
Scaling carbon fluxes from eddy covariance sites to globe: Synthesis and evaluation of the FLUXCOM approach |
| title_full_unstemmed |
Scaling carbon fluxes from eddy covariance sites to globe: Synthesis and evaluation of the FLUXCOM approach |
| title_sort |
Scaling carbon fluxes from eddy covariance sites to globe: Synthesis and evaluation of the FLUXCOM approach |
| author |
Jung, Martin |
| author_facet |
Jung, Martin Schwalm, Christopher Migliavacca, Mirco Walther, Sophia Camps-Valls, Gustau Koirala, Sujan Anthoni, Peter Besnard, Simon Bodesheim, Paul Carvalhais, Nuno Chevallier, Frederic Gans, Fabian Goll, Daniel S. Haverd, Vanessa Köhler, Philipp Ichii, Kazuhito Jain, Atul K. Liu, Junzhi Lombardozzi, Danica Nabel, Julia E. M. S. Nelson, Jacob A. O'Sullivan, Michael Pallandt, Martijn Papale, Dario Peters, Wouter Pongratz, Julia Rödenbeck, Christian Sitch, Stephen Tramontana, Gianluca Walker, Anthony Weber, Ulrich Reichstein, Markus |
| author_role |
author |
| author2 |
Schwalm, Christopher Migliavacca, Mirco Walther, Sophia Camps-Valls, Gustau Koirala, Sujan Anthoni, Peter Besnard, Simon Bodesheim, Paul Carvalhais, Nuno Chevallier, Frederic Gans, Fabian Goll, Daniel S. Haverd, Vanessa Köhler, Philipp Ichii, Kazuhito Jain, Atul K. Liu, Junzhi Lombardozzi, Danica Nabel, Julia E. M. S. Nelson, Jacob A. O'Sullivan, Michael Pallandt, Martijn Papale, Dario Peters, Wouter Pongratz, Julia Rödenbeck, Christian Sitch, Stephen Tramontana, Gianluca Walker, Anthony Weber, Ulrich Reichstein, Markus |
| author2_role |
author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author |
| dc.contributor.none.fl_str_mv |
DCEA - Departamento de Ciências e Engenharia do Ambiente RUN |
| dc.contributor.author.fl_str_mv |
Jung, Martin Schwalm, Christopher Migliavacca, Mirco Walther, Sophia Camps-Valls, Gustau Koirala, Sujan Anthoni, Peter Besnard, Simon Bodesheim, Paul Carvalhais, Nuno Chevallier, Frederic Gans, Fabian Goll, Daniel S. Haverd, Vanessa Köhler, Philipp Ichii, Kazuhito Jain, Atul K. Liu, Junzhi Lombardozzi, Danica Nabel, Julia E. M. S. Nelson, Jacob A. O'Sullivan, Michael Pallandt, Martijn Papale, Dario Peters, Wouter Pongratz, Julia Rödenbeck, Christian Sitch, Stephen Tramontana, Gianluca Walker, Anthony Weber, Ulrich Reichstein, Markus |
| dc.subject.por.fl_str_mv |
Ecology, Evolution, Behavior and Systematics Earth-Surface Processes SDG 15 - Life on Land |
| topic |
Ecology, Evolution, Behavior and Systematics Earth-Surface Processes SDG 15 - Life on Land |
| description |
This research has been supported by the European Space Agency (grant no. ESRIN/4000123002/18/I-NB), the National Science Foundation under cooperative agreement no. 1852977 and the U.S. Department of Energy (no. DE-SC0016323) |
| publishDate |
2020 |
| dc.date.none.fl_str_mv |
2020-03-16 2020-03-16T00:00:00Z 2021-06-16T22:21:10Z |
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info:eu-repo/semantics/publishedVersion |
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info:eu-repo/semantics/article |
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article |
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publishedVersion |
| dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10362/119435 |
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http://hdl.handle.net/10362/119435 |
| dc.language.iso.fl_str_mv |
eng |
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eng |
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1726-4170 PURE: 32002528 https://doi.org/10.5194/bg-17-1343-2020 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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23 application/pdf |
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