Riverine carbon content, fluxes, sources, and impacts in the Qinghai-Tibet Plateau permafrost watersheds ...

• Main Authors: Song, Chunlin, Wang, Genxu
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: permafrost
• Online Access: https://dx.doi.org/10.57757/iugg23-1429; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017171

<!--!introduction!--> Climatic warming causes permafrost carbon pool destabilization, with part of the thawed carbon being released to the fluvial systems. As transport pipes and active reactors of terrigenous carbon, rivers and streams emit a significant amount of gaseous carbon and transport a large flux of dissolved or particulate carbon in waterways. Yet the export patterns, magnitudes, and impacts of riverine carbon in permafrost regions are not well understood. Here we investigated the concentrations, fluxes, and carbon isotopes ( 14 C and 13 C) of various carbon species, including dissolved inorganic carbon (DIC), dissolved organic carbon (DOC), and carbon dioxide (CO 2 ), from permafrost rivers on the Qinghai-Tibet Plateau (QTP). Each of the carbon species showed heterogeneous spatial and seasonal patterns. The active layer dynamics and hydrological regime change had strong controls on riverine carbon. The integration of terrestrial carbon fluxes with the aquatic carbon flux show that aquatic ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...