The importance of hydrology in routing terrestrial carbon to the atmosphere via global streams and rivers

Liu, Shaoda; Kuhn, C; Amatulli, Giuseppe; Aho, Kelly S.; Butman, David; Allen, George H.; Lin, Peirong; Pan, Ming; Yamazaki, Dai; Brinkerhoff, Craig; Gleason, Colin J.; Xia, Xinghui; Raymond, Peter A.

doi:10.1073/pnas.2106322119

articleProceedings of the National Academy of SciencesMar 7, 2022GREEN OA

The importance of hydrology in routing terrestrial carbon to the atmosphere via global streams and rivers

SLShaoda Liu CKC Kuhn GAGiuseppe Amatulli KSKelly S. Aho DBDavid Butman

Beijing Normal University · Yale University · +9 more institutions

PubMed

Indexed incrossrefpubmed

Abstract

Significance Stream/river carbon dioxide (CO 2 ) emission has significant spatial and seasonal variations critical for understanding its macroecosystem controls and plumbing of the terrestrial carbon budget. We relied on direct fluvial CO 2 partial pressure measurements and seasonally varying gas transfer velocity and river network surface area estimates to resolve reach-level seasonal variations of the flux at the global scale. The percentage of terrestrial primary production (GPP) shunted into rivers that ultimately contributes to CO 2 evasion increases with discharge across regions, due to a stronger response in fluvial CO 2 evasion to discharge than GPP. This highlights the importance of hydrology, in…

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Topics & keywords

Topics

Keywords

Fluvial
Environmental science
STREAMS
Hydrology (agriculture)
Carbon cycle
Routing (electronic design automation)
Carbon dioxide
Atmosphere (unit)

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