Fig. 2 | Nature Communications

Fig. 2

From: Unexpected large evasion fluxes of carbon dioxide from turbulent streams draining the world’s mountains

Fig. 2The alternative text for this image may have been generated using AI.

Sources of CO2 in streams in the Swiss Alps. a Estimated groundwater pCO2 in Swiss mountain catchments. b Isotopic compositions of dissolved inorganic carbon (δ13C-DIC) indicates biogenic (e.g., soil respiration) as well as geogenic sources (more enriched) (‰ Vienna Pee Dee Belemnite, VPDB). End-members are adopted from refs. 37,38. The box plot shows median and quartile δ13C-DIC compositions repeatedly sampled across the 12 Swiss sites (n = 134; 7–15 samples per stream) (calculated in JMP 13, SAS Institute Inc., USA)

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