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Conference Paper: CO2 emissions from Chinese inland waters under global change
Title | CO2 emissions from Chinese inland waters under global change |
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Authors | |
Issue Date | 2021 |
Publisher | Korean Society of Limnology. |
Citation | The 35th Congress of the International Society of Limnology (SIL 2021): Biodiversity and Ecosystem Functions: Healthy Rivers, Lakes, and Humans, Gwangju, Republic of Korea , 22-27 August 2021 How to Cite? |
Abstract | Outgassing of carbon dioxide (CO2) from inland waters into the atmosphere is an important
component of the global carbon cycle. Yet, fluxes of this evasion pathway remain uncertain due
to the lack of spatially and temporally resolved CO2 measurements and water surface area estimates. Here we present seasonal and annual fluxes of CO2 emissions from Chinese inland waters (streams, rivers, lakes and reservoirs) and evaluate their changes over the past three decades. We estimate that the CO2 efflux from Chinese inland waters was 138±31 Tg C yr–1 in the 1980s and it declined to 98±19 Tg C yr–1 in the 2010s, with 88–93% of the emissions from streams and rivers. This significant decrease was likely caused by a combination of anthropogenic perturbations, including the conversion of flowing rivers to reservoirs, widespread eutrophication, and the implementation of reforestation programmes. However, we also report increased evasion rates from the Tibetan Plateau inland waters, which we relate to expanded surface area and enhanced lateral carbon export due to climate warming. We suggest that the CO2 emissions from Chinese inland waters have greatly offset the terrestrial carbon sink and are therefore a key component of China’s carbon budget. |
Description | Track C l S8(1) -S8. Linking Eutrophication and Reoligotrophication to Carbon Sinks and Sources in Inland Waters Toward a Global Synthesis - no. S8-O-210418 |
Persistent Identifier | http://hdl.handle.net/10722/313323 |
DC Field | Value | Language |
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dc.contributor.author | Ran, L | - |
dc.date.accessioned | 2022-06-07T03:47:40Z | - |
dc.date.available | 2022-06-07T03:47:40Z | - |
dc.date.issued | 2021 | - |
dc.identifier.citation | The 35th Congress of the International Society of Limnology (SIL 2021): Biodiversity and Ecosystem Functions: Healthy Rivers, Lakes, and Humans, Gwangju, Republic of Korea , 22-27 August 2021 | - |
dc.identifier.uri | http://hdl.handle.net/10722/313323 | - |
dc.description | Track C l S8(1) -S8. Linking Eutrophication and Reoligotrophication to Carbon Sinks and Sources in Inland Waters Toward a Global Synthesis - no. S8-O-210418 | - |
dc.description.abstract | Outgassing of carbon dioxide (CO2) from inland waters into the atmosphere is an important component of the global carbon cycle. Yet, fluxes of this evasion pathway remain uncertain due to the lack of spatially and temporally resolved CO2 measurements and water surface area estimates. Here we present seasonal and annual fluxes of CO2 emissions from Chinese inland waters (streams, rivers, lakes and reservoirs) and evaluate their changes over the past three decades. We estimate that the CO2 efflux from Chinese inland waters was 138±31 Tg C yr–1 in the 1980s and it declined to 98±19 Tg C yr–1 in the 2010s, with 88–93% of the emissions from streams and rivers. This significant decrease was likely caused by a combination of anthropogenic perturbations, including the conversion of flowing rivers to reservoirs, widespread eutrophication, and the implementation of reforestation programmes. However, we also report increased evasion rates from the Tibetan Plateau inland waters, which we relate to expanded surface area and enhanced lateral carbon export due to climate warming. We suggest that the CO2 emissions from Chinese inland waters have greatly offset the terrestrial carbon sink and are therefore a key component of China’s carbon budget. | - |
dc.language | eng | - |
dc.publisher | Korean Society of Limnology. | - |
dc.relation.ispartof | The 35th Congress of the International Society of Limnology (SIL 2021) | - |
dc.title | CO2 emissions from Chinese inland waters under global change | - |
dc.type | Conference_Paper | - |
dc.identifier.email | Ran, L: lsran@hku.hk | - |
dc.identifier.authority | Ran, L=rp02173 | - |
dc.identifier.hkuros | 324000 | - |
dc.publisher.place | Korea | - |