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Carbon dioxide fluxes increase from day to night across European streams

Attermeyer, Katrin; Casas-Ruiz, Joan Pere; Fuss, Thomas; Pastor, Ada; Cauvy-Fraunié, Sophie; Sheath, Danny; Nydahl, Anna C.; Doretto, Alberto; Portela, Ana Paula; Doyle, Brian C.; Simov, Nikolay; Gutmann Roberts, Catherine; Niedrist, Georg H.; Timoner, Xisca; Evtimova, Vesela; Barral-Fraga, Laura; Bašić, Tea; Audet, Joachim; Deininger, Anne; ... mehr


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−2 h−1 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.

Verlagsausgabe §
DOI: 10.5445/IR/1000141554
Veröffentlicht am 27.12.2021
DOI: 10.1038/s43247-021-00192-w
Web of Science
Zitationen: 11
Zitationen: 15
Zugehörige Institution(en) am KIT Institut für Geographie und Geoökologie (IFGG)
Universität Karlsruhe (TH) – Interfakultative Einrichtungen (Interfakultative Einrichtungen)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 12.2021
Sprache Englisch
Identifikator ISSN: 2662-4435
KITopen-ID: 1000141554
Erschienen in Communications earth & environment
Verlag Springer Nature
Band 2
Heft 1
Seiten Art.Nr.: 118
Vorab online veröffentlicht am 10.06.2021
Nachgewiesen in Web of Science
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