Abstract
<jats:title>Abstract</jats:title><jats:p>Globally, inland waters emit over 2 Pg of carbon per year as carbon dioxide, of which the majority originates from streams and rivers. Despite the global significance of fluvial carbon dioxide emissions, little is known about their diel dynamics. Here we present a large-scale assessment of day- and night-time carbon dioxide fluxes at the water-air interface across 34 European streams. We directly measured fluxes four times between October 2016 and July 2017 using drifting chambers. Median fluxes are 1.4 and 2.1 mmol m<jats:sup>−2</jats:sup> h<jats:sup>−1</jats:sup> at midday and midnight, respectively, with night fluxes exceeding those during the day by 39%. We attribute diel carbon dioxide flux variability mainly to changes in the water partial pressure of carbon dioxide. However, no consistent drivers could be identified across sites. Our findings highlight widespread day-night changes in fluvial carbon dioxide fluxes and suggest that the time of day greatly influences measured carbon dioxide fluxes across European streams.</jats:p>
| Original language | English |
|---|---|
| Journal | Communications Earth and Environment |
| Volume | 2 |
| Issue number | 1 |
| Early online date | 10 Jun 2021 |
| DOIs | |
| Publication status | E-pub ahead of print - 10 Jun 2021 |
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 13 Climate Action
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Carbon dioxide fluxes increase from day to night across European streams
Attermeyer, K., Casas-Ruiz, J., Fuss, T., Pastor, A., Cauvy-Fraunié, S., Sheath, D., Nydahl, A., Doretto, A., Portela, A., Doyle, B., Simov, N., Gutmann Roberts, C., Niedrist, G., Timoner, X., Evtimova, V., Barral-Fraga, L., Bašić, T., Audet, J., Deininger, A. & Busst, G. & 26 others, , 22 Mar 2021.Research output: Working paper / Preprint › Preprint
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