Rocher-Ros, Gerard
- Institutionen för skogens ekologi och skötsel, Sveriges lantbruksuniversitet
Sammanfattning
Inland waters emit large amounts of carbon and are key players in the global carbon budget. Particularly high rates of carbon emissions have been reported in streams draining mountains, tropical regions, and peatlands. However, few studies have examined the spatial variability of CO2 concentrations and fluxes occurring within these systems, particularly as a function of catchment morphology. Here we evaluated spatial patterns of CO2 in three tropical, headwater catchments in relation to the river network and stream geomorphology. We measured dissolved carbon dioxide (pCO(2)), aquatic CO2 emissions, discharge, and stream depth and width at high spatial resolutions along multiple stream reaches. Confirming previous studies, we found that tropical headwater streams are an important source of CO2 to the atmosphere. More notably, we found marked, predictable spatial organization in aquatic carbon fluxes as a function of landscape position. For example, pCO(2) was consistently high (>10,000 ppm) at locations close to groundwater sources and just downstream of hydrologically connected wetlands, but consistently low (
Nyckelord
greenhouse gas; tropical peatland; headwater streams; carbon dioxide emissions; mountain streams; river network
Publicerad i
Water Resources Research
2025, volym: 61, nummer: 4, artikelnummer: e2024WR038036
Utgivare: AMER GEOPHYSICAL UNION
SLU författare
UKÄ forskningsämne
Klimatvetenskap
Oceanografi, hydrologi, vattenresurser
Publikationens identifierare
- DOI: https://doi.org/10.1029/2024WR038036
Permanent länk till denna sida (URI)
https://res.slu.se/id/publ/141813