Carbon dioxide fluxes and carbon balance of an agricultural grassland in southern Finland

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http://hdl.handle.net/10138/332632

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Heimsch , L , Lohila , A , Tuovinen , J-P , Vekuri , H , Heinonsalo , J , Nevalainen , O , Korkiakoski , M , Liski , J , Laurila , T & Kulmala , L 2021 , ' Carbon dioxide fluxes and carbon balance of an agricultural grassland in southern Finland ' , Biogeosciences , vol. 18 , no. 11 , pp. 3467-3483 . https://doi.org/10.5194/bg-18-3467-2021

Title: Carbon dioxide fluxes and carbon balance of an agricultural grassland in southern Finland
Author: Heimsch, Laura; Lohila, Annalea; Tuovinen, Juha-Pekka; Vekuri, Henriikka; Heinonsalo, Jussi; Nevalainen, Olli; Korkiakoski, Mika; Liski, Jari; Laurila, Tuomas; Kulmala, Liisa
Contributor organization: Institute for Atmospheric and Earth System Research (INAR)
Forest Ecology and Management
Viikki Plant Science Centre (ViPS)
Jussi Heinonsalo / Principal Investigator
Forest Soil Science and Biogeochemistry
Ecosystem processes (INAR Forest Sciences)
Department of Forest Sciences
Date: 2021-06-10
Language: eng
Number of pages: 17
Belongs to series: Biogeosciences
ISSN: 1726-4170
DOI: https://doi.org/10.5194/bg-18-3467-2021
URI: http://hdl.handle.net/10138/332632
Abstract: A significant proportion of the global carbon emissions to the atmosphere originate from agriculture. Therefore, continuous long-term monitoring of CO2 fluxes is essential to understand the carbon dynamics and balances of different agricultural sites. Here we present results from a new eddy covariance flux measurement site located in southern Finland. We measured CO2 and H2O fluxes at this agricultural grassland site for 2 years, from May 2018 to May 2020. In particular the first summer experienced prolonged dry periods, which affected the CO2 fluxes, and substantially larger fluxes were observed in the second summer. During the dry summer, leaf area index (LAI) was notably lower than in the second summer. Water use efficiency increased with LAI in a similar manner in both years, but photosynthetic capacity per leaf area was lower during the dry summer. The annual carbon balance was calculated based on the CO2 fluxes and management measures, which included input of carbon as organic fertilizers and output as yield. The carbon balance of the field was -57 +/- 10 and -86 +/- 12 g C m(-2) yr(-1) in the first and second study years, respectively.
Subject: 114 Physical sciences
4112 Forestry
1172 Environmental sciences
Peer reviewed: Yes
Rights: cc_by
Usage restriction: openAccess
Self-archived version: publishedVersion


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