Escalating Carbon Export from High-Elevation Rivers in a Warming Climate
High-elevation mountains have experienced disproportionately rapid warming, yet the effect of warming on the lateral export of terrestrial carbon to rivers remains poorly explored and understood in these regions. Here, we present a long-term data set of dissolved inorganic carbon (DIC) and a more de...
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ftslunivuppsala:oai:pub.epsilon.slu.se:33456 2024-05-19T07:47:08+00:00 Escalating Carbon Export from High-Elevation Rivers in a Warming Climate Klaus, Marcus 2024 application/pdf https://pub.epsilon.slu.se/33456/ https://pub.epsilon.slu.se/33456/1/xu-s-et-al-20240426.pdf sv eng swe eng https://pub.epsilon.slu.se/33456/1/xu-s-et-al-20240426.pdf Klaus, Marcus (2024). Escalating Carbon Export from High-Elevation Rivers in a Warming Climate. Environmental Science and Technology. 58 :16 , 7032 - 7044 [Research article] Environmental Sciences (social aspects to be 507) Physical Geography Research article NonPeerReviewed 2024 ftslunivuppsala 2024-04-30T23:37:03Z High-elevation mountains have experienced disproportionately rapid warming, yet the effect of warming on the lateral export of terrestrial carbon to rivers remains poorly explored and understood in these regions. Here, we present a long-term data set of dissolved inorganic carbon (DIC) and a more detailed, short-term data set of DIC, delta C-13(DIC), and organic carbon from two major rivers of the Qinghai-Tibetan Plateau, the Jinsha River (JSR) and the Yalong River (YLR). In the higher-elevation JSR with similar to 51% continuous permafrost coverage, warming (>3 degrees C) and increasing precipitation coincided with substantially increased DIC concentrations by 35% and fluxes by 110%. In the lower-elevation YLR with similar to 14% continuous permafrost, such increases did not occur despite a comparable extent of warming. Riverine concentrations of dissolved and particulate organic carbon increased with discharge (mobilization) in both rivers. In the JSR, DIC concentrations transitioned from dilution (decreasing concentration with discharge) in earlier, colder years to chemostasis (relatively constant concentration) in later, warmer years. This changing pattern, together with lighter delta C-13(DIC) under high discharge, suggests that permafrost thawing boosts DIC production and export via enhancing soil respiration and weathering. These findings reveal the predominant role of warming in altering carbon lateral export by escalating concentrations and fluxes and modifying export patterns. Article in Journal/Newspaper permafrost Swedish University of Agricultural Sciences (SLU): Epsilon Open Archive |
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Open Polar |
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Swedish University of Agricultural Sciences (SLU): Epsilon Open Archive |
op_collection_id |
ftslunivuppsala |
language |
Swedish English |
topic |
Environmental Sciences (social aspects to be 507) Physical Geography |
spellingShingle |
Environmental Sciences (social aspects to be 507) Physical Geography Klaus, Marcus Escalating Carbon Export from High-Elevation Rivers in a Warming Climate |
topic_facet |
Environmental Sciences (social aspects to be 507) Physical Geography |
description |
High-elevation mountains have experienced disproportionately rapid warming, yet the effect of warming on the lateral export of terrestrial carbon to rivers remains poorly explored and understood in these regions. Here, we present a long-term data set of dissolved inorganic carbon (DIC) and a more detailed, short-term data set of DIC, delta C-13(DIC), and organic carbon from two major rivers of the Qinghai-Tibetan Plateau, the Jinsha River (JSR) and the Yalong River (YLR). In the higher-elevation JSR with similar to 51% continuous permafrost coverage, warming (>3 degrees C) and increasing precipitation coincided with substantially increased DIC concentrations by 35% and fluxes by 110%. In the lower-elevation YLR with similar to 14% continuous permafrost, such increases did not occur despite a comparable extent of warming. Riverine concentrations of dissolved and particulate organic carbon increased with discharge (mobilization) in both rivers. In the JSR, DIC concentrations transitioned from dilution (decreasing concentration with discharge) in earlier, colder years to chemostasis (relatively constant concentration) in later, warmer years. This changing pattern, together with lighter delta C-13(DIC) under high discharge, suggests that permafrost thawing boosts DIC production and export via enhancing soil respiration and weathering. These findings reveal the predominant role of warming in altering carbon lateral export by escalating concentrations and fluxes and modifying export patterns. |
format |
Article in Journal/Newspaper |
author |
Klaus, Marcus |
author_facet |
Klaus, Marcus |
author_sort |
Klaus, Marcus |
title |
Escalating Carbon Export from High-Elevation Rivers in a Warming Climate |
title_short |
Escalating Carbon Export from High-Elevation Rivers in a Warming Climate |
title_full |
Escalating Carbon Export from High-Elevation Rivers in a Warming Climate |
title_fullStr |
Escalating Carbon Export from High-Elevation Rivers in a Warming Climate |
title_full_unstemmed |
Escalating Carbon Export from High-Elevation Rivers in a Warming Climate |
title_sort |
escalating carbon export from high-elevation rivers in a warming climate |
publishDate |
2024 |
url |
https://pub.epsilon.slu.se/33456/ https://pub.epsilon.slu.se/33456/1/xu-s-et-al-20240426.pdf |
genre |
permafrost |
genre_facet |
permafrost |
op_relation |
https://pub.epsilon.slu.se/33456/1/xu-s-et-al-20240426.pdf Klaus, Marcus (2024). Escalating Carbon Export from High-Elevation Rivers in a Warming Climate. Environmental Science and Technology. 58 :16 , 7032 - 7044 [Research article] |
_version_ |
1799487459511238656 |