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Reconciling the Carbon Balance of Northern Sweden Through Integration of Observations and Modelling

Sathyanadh, Anusha and Monteil, Guillaume and Scholze, Marko and Klosterhalfen, Anne and Laudon, Hjalmar and Wu, Zhendong and Gerbig, Christoph and Peters, Wouter and Bastrikov, Vladislav and Nilsson, Mats and Peichl, Matthias (2021). Reconciling the Carbon Balance of Northern Sweden Through Integration of Observations and Modelling. Journal Of Geophysical Research: Atmospheres. 126 , e2021JD035185
[Research article]

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Abstract

The boreal biome plays an important role in the global carbon cycle. However, current estimates of its sink-source strength and responses to changes in climate are primarily derived from models and thus remain uncertain. A major challenge is the validation of these models at a regional scale since empirical flux estimates are typically confined to ecosystem or continental scales. The Integrated Carbon Observation System (ICOS)-Svartberget atmospheric station (SVB) provides observations including tall tower eddy covariance (EC) and atmospheric concentration measurements that can contribute to such validation in Northern Sweden. Thus, the overall aim of this study was to quantify the carbon balance in Northern Sweden region by integrating land-atmosphere fluxes and atmospheric carbon dioxide (CO2) concentrations. There were three specific objectives. First, to compare flux estimates from four models (VPRM, LPJ-GUESS, ORCHIDEE, and SiBCASA) to tall tower EC measurements at SVB during the years 2016-2018. Second to assess the fluxes' impact on atmospheric CO2 concentrations using a regional transport model. Third, to assess the impact of the drought in 2018. The comparison of estimated concentrations with ICOS observations helped the evaluation of the models' regional scale performance. Both the simulations and observations indicate there were similar reductions in the net CO2 uptake during drought. All the models (except for SiBCASA) and observations indicated the region was a net carbon sink during the 3-year study period. Our study highlights a need to improve vegetation models through comparisons with empirical data and demonstrate the ICOS network's potential utility for constraining CO2 fluxes in the region.

Authors/Creators:Sathyanadh, Anusha and Monteil, Guillaume and Scholze, Marko and Klosterhalfen, Anne and Laudon, Hjalmar and Wu, Zhendong and Gerbig, Christoph and Peters, Wouter and Bastrikov, Vladislav and Nilsson, Mats and Peichl, Matthias
Title:Reconciling the Carbon Balance of Northern Sweden Through Integration of Observations and Modelling
Series Name/Journal:Journal Of Geophysical Research: Atmospheres
Year of publishing :2021
Volume:126
Article number:e2021JD035185
Number of Pages:20
Publisher:AMER GEOPHYSICAL UNION
ISSN:2169-897X
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Meteorology and Atmospheric Sciences
Keywords:boreal biome, net ecosystem exchange, tall tower eddy covariance, vegetation model, atmospheric transport model, FLEXPART
URN:NBN:urn:nbn:se:slu:epsilon-p-115412
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-115412
Additional ID:
Type of IDID
DOI10.1029/2021JD035185
Web of Science (WoS)000729996000027
ID Code:26695
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Ecology and Management
Deposited By: SLUpub Connector
Deposited On:14 Jan 2022 08:26
Metadata Last Modified:14 Jan 2022 08:31

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