Environmental controls on the CO2 exchange in north European mires

Anders Lindroth; Magnus Lund; Mats Nilsson; Mika Aurela; Torben Röjle Christensen; Tuomas Laurila; Janne Rinne; Terhi Riutta; Jörgen Sagerfors; Lena Ström; Juha-Pekka Tuovinen; Timo Vesala

doi:10.1111/j.1600-0889.2007.00310.x

Environmental controls on the CO2 exchange in north European mires

Tellus B: Chemical and Physical Meteorology

Volume 59 (2007): Issue 5

By: Anders Lindroth, Magnus Lund, Mats Nilsson, Mika Aurela, Torben Röjle Christensen, Tuomas Laurila, Janne Rinne, Terhi Riutta, Jörgen Sagerfors, Lena Ström, Juha-Pekka Tuovinen and Timo Vesala

Open Access

|Jan 2007

Abstract

Net CO₂ exchange measured under well-mixed atmospheric conditions in four different mires in Sweden and Finland were used to analyse which factors were controlling photosynthesis and respiration. The parameters of a light response function showed strong seasonal variations with similar behaviour for all mires. The half-monthly nighttime respiration rates in the central part of the growing season were about two times higher in the southernmost, warmest site, Fåje, as compared to the northernmost, coldest site, Kaamanen. However, Kaamanen had high photosynthesis rates, and this in combination with the long daylight periods in the middle of the summer caused Kaamanen to have the largest net ecosystem exchange (NEE) during the summer period. Fåje that showed the highest productivity had also the highest respiration and therefore, the lowest NEE during summer. Correlation between half-monthly components and different environmental variables showed the highest correlation between the components themselves. Thereafter came temperature except for Fåje where water table depth (WTD) explained most of the variance both for detrended and temperature-normalized components. All sites showed dependencies between WTD and the respective components during drying up periods. Temperature sensitivity was higher for productivity than for respiration indicating that CO₂ uptake would increase during global warming.

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Articles in this issue

DOI: https://doi.org/10.1111/j.1600-0889.2007.00310.x | Journal eISSN: 1600-0889

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Language: English

Page range: 812 - 825

Submitted on: Jan 15, 2007

Accepted on: Jul 4, 2007

Published on: Jan 1, 2007

Published by: Stockholm University Press

In partnership with: Paradigm Publishing Services

© 2007 Anders Lindroth, Magnus Lund, Mats Nilsson, Mika Aurela, Torben Röjle Christensen, Tuomas Laurila, Janne Rinne, Terhi Riutta, Jörgen Sagerfors, Lena Ström, Juha-Pekka Tuovinen, Timo Vesala, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 59 (2007): Issue 5