Aquatic carbon fluxes in a hemiboreal catchment are predictable from landscape morphology, temperature, and runoff

Sammanfattning

Aquatic networks contribute greenhouse gases and lateral carbon (C) export from catchments. The magnitudes of these fluxes exceed the global land C sink but are uncertain. Resolving this uncertainty is important for understanding climate feedbacks. We quantified vertical methane (CH4) and carbon dioxide (CO2) emissions from lakes and streams, and lateral export of dissolved inorganic and organic carbon from a hemiboreal catchment for 3 yr. Lateral C fluxes dominated the total aquatic C flux. All aquatic C fluxes were disproportionately contributed from spatially restricted areas and/or short-term events. Hence, consideration of local and episodic variability is vital. Temperature and runoff were the main temporal drivers for lake and stream C emissions, respectively. Whole-catchment aquatic C emissions scaled linearly with these drivers within timeframes of stable land-cover. Hence, temperature and runoff increase across Northern Hemisphere humid areas from climate change may yield proportional increases in aquatic C fluxes.

Publicerad i

Limnology and Oceanography Letters
2023, volym: 8, nummer: 2, sidor: 313-322
Utgivare: WILEY

SLU författare

• Wallin, Marcus

  • Institutionen för vatten och miljö, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Klimatforskning

Publikationens identifierare

• DOI: https://doi.org/10.1002/lol2.10312

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/121447