Table · dataset · 2026
Photodegradation Unlocks Permafrost Carbon in Qinghai-Tibetan Plateau Rivers
Listed in HKU DataHub and figshare and Loughborough Research Repository — shown once because both records carry DOI 10.1021/acs.est.6c04255.s002
High-altitude rivers on the Qinghai-Tibetan Plateau serve as distinctive photochemical reactors, where intense solar radiation interacts with ancient carbon reservoirs to fundamentally reshape the fate of dissolved organic matter (DOM).
Description
Based on isotopic tracers (δ<sup>2</sup>H, δ<sup>18</sup>O, δ<sup>3</sup>H, Δ<sup>14</sup>C, and δ<sup>13</sup>C) and molecular-level characterization with 7979 unique formulas identified along the Yarlung Tsangpo River, we reveal a synergistic control of sunlight and carbon source on DOM cycling.
Isotopic signatures indicate considerable inputs of “old water” (i.e., glacial meltwater) and confirm permafrost-derived carbon as a dominant source of aged sedimentary organic matter. Molecular analyses show that aromatic DOM, mainly composed of terrestrial lignin- and tannin-like compounds, is highly photoreactive, and strong sunlight drives its dearomatization and oxidation. Photodegradation products of aromatic DOM share 26.8% of their molecular formulas with F<sub>pre1953</sub>-related DOM and 44.8% with permafrost-derived DOM.
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This process unlocks previously stable and old carbon into labile fraction, enhancing fluvial carbon mineralization. The liberated ancient DOM shows higher bioavailability, potentially promoting CH<sub>4</sub>/CO<sub>2</sub> emissions and mercury accumulation. Our study identifies high-altitude rivers as critical photochemical hubs that mobilize cryospheric organic carbon and imply a positive climate feedback in warming alpine regions.
Links
Where it is published
- DOI doi.org/10.1021/acs.est.6c04255.s002 ↗
DOI / persistent id · from datahub hku hk
Catalogue records · 1
- OAI-PMH record api.figshare.com/v2/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai%3Af… ↗
metadata API · from datahub hku hk
Topics
- From keywords
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Provenance · 3 source records, 45 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| HKU DataHub | oai:figshare.com:article/34003145 | 10 d ago | JSON v1 |
| figshare | oai:figshare.com:article/34003145 | 10 d ago | JSON v1 |
| Loughborough Research Repository | oai:figshare.com:article/34003145 | 10 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · datahub hku hk | connector:datahub_hku_hk@1.0.0 | |
| concepts[disease].local:disease:cancer | mapping · figshare com | vocabulary-mapper@1.0.0 | keywords['Cancer'] |
| concepts[disease].local:disease:cancer | mapping · datahub hku hk | vocabulary-mapper@1.0.0 | keywords['Cancer'] |
| concepts[disease].local:disease:cancer | mapping · repository lboro ac uk | vocabulary-mapper@1.0.0 | keywords['Cancer'] |
| concepts[field].anzsrc:group:3102 | mapping · repository lboro ac uk | vocabulary-mapper@1.0.0 | keywords['Computational Biology'] |
| concepts[field].anzsrc:group:3102 | mapping · figshare com | vocabulary-mapper@1.0.0 | keywords['Computational Biology'] |
| concepts[field].anzsrc:group:3102 | mapping · datahub hku hk | vocabulary-mapper@1.0.0 | keywords['Computational Biology'] |
| concepts[field].anzsrc:group:3103 | mapping · datahub hku hk | vocabulary-mapper@1.0.0 | keywords['Ecology'] |
| concepts[field].anzsrc:group:3103 | mapping · repository lboro ac uk | vocabulary-mapper@1.0.0 | keywords['Ecology'] |
| concepts[field].anzsrc:group:3103 | mapping · figshare com | vocabulary-mapper@1.0.0 | keywords['Ecology'] |
| concepts[field].anzsrc:group:4410 | mapping · datahub hku hk | vocabulary-mapper@1.0.0 | keywords['Sociology'] |
| concepts[field].anzsrc:group:4410 | mapping · figshare com | vocabulary-mapper@1.0.0 | keywords['Sociology'] |
| concepts[field].anzsrc:group:4410 | mapping · repository lboro ac uk | vocabulary-mapper@1.0.0 | keywords['Sociology'] |
| concepts[field].local:field:astronomy | mapping · figshare com | connector:figshare_com@1.0.0 | |
| concepts[field].local:field:chemistry | mapping · figshare com | connector:figshare_com@1.0.0 | |
| concepts[field].local:field:chemistry | mapping · repository lboro ac uk | connector:repository_lboro_ac_uk@1.0.0 | |
| concepts[field].local:field:chemistry | mapping · datahub hku hk | connector:datahub_hku_hk@1.0.0 | |
| concepts[field].local:field:computer-science-ai | mapping · repository lboro ac uk | connector:repository_lboro_ac_uk@1.0.0 | |
| concepts[field].local:field:computer-science-ai | mapping · figshare com | connector:figshare_com@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · datahub hku hk | connector:datahub_hku_hk@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · figshare com | connector:figshare_com@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · repository lboro ac uk | connector:repository_lboro_ac_uk@1.0.0 | |
| concepts[field].local:field:economics-finance | mapping · repository lboro ac uk | connector:repository_lboro_ac_uk@1.0.0 | |
| concepts[field].local:field:economics-finance | mapping · figshare com | connector:figshare_com@1.0.0 | |
| concepts[field].local:field:engineering | mapping · repository lboro ac uk | connector:repository_lboro_ac_uk@1.0.0 | |
| concepts[field].local:field:engineering | mapping · figshare com | connector:figshare_com@1.0.0 | |
| concepts[field].local:field:humanities | mapping · figshare com | connector:figshare_com@1.0.0 | |
| concepts[field].local:field:humanities | mapping · repository lboro ac uk | connector:repository_lboro_ac_uk@1.0.0 | |
| concepts[field].local:field:life-sciences | mapping · figshare com | connector:figshare_com@1.0.0 | |
| concepts[field].local:field:life-sciences | mapping · datahub hku hk | connector:datahub_hku_hk@1.0.0 | |
| concepts[field].local:field:life-sciences | mapping · repository lboro ac uk | connector:repository_lboro_ac_uk@1.0.0 | |
| concepts[field].local:field:materials-science | mapping · repository lboro ac uk | connector:repository_lboro_ac_uk@1.0.0 | |
| concepts[field].local:field:mathematics-statistics | mapping · repository lboro ac uk | connector:repository_lboro_ac_uk@1.0.0 | |
| concepts[field].local:field:medicine-health | mapping · repository lboro ac uk | connector:repository_lboro_ac_uk@1.0.0 | |
| concepts[field].local:field:medicine-health | mapping · datahub hku hk | connector:datahub_hku_hk@1.0.0 | |
| concepts[field].local:field:medicine-health | mapping · figshare com | connector:figshare_com@1.0.0 | |
| concepts[field].local:field:ocean-atmospheric | mapping · figshare com | connector:figshare_com@1.0.0 | |
| concepts[field].local:field:psychology-behavioral | mapping · repository lboro ac uk | connector:repository_lboro_ac_uk@1.0.0 | |
| concepts[field].local:field:social-science | mapping · repository lboro ac uk | connector:repository_lboro_ac_uk@1.0.0 | |
| concepts[field].local:field:social-science | mapping · datahub hku hk | connector:datahub_hku_hk@1.0.0 | |
| concepts[field].local:field:social-science | mapping · figshare com | connector:figshare_com@1.0.0 | |
| description | source · datahub hku hk | connector:datahub_hku_hk@1.0.0 | /metadata/dc/description |
| license | source · datahub hku hk | connector:datahub_hku_hk@1.0.0 | /metadata/dc/rights |
| publication_date | source · datahub hku hk | connector:datahub_hku_hk@1.0.0 | |
| title | source · datahub hku hk | connector:datahub_hku_hk@1.0.0 | /metadata/dc/title |