Carbon dioxide outgassing from Amazonian aquatic ecosystems in the Negro River basin
Outgassing of biogenic gases from river systems is observed widely, and tropical rivers and their extensive floodplains are likely to be large sources. By combining the first regional survey of CO2 outgassing from rivers and floodplains in the Amazonian Negro River basin with areal coverage of habit...
| Autor principal: | Scofield, Vinicius |
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| Outros Autores: | Melack, John M., Barbosa, Pedro Maia, Amaral, João Henrique Fernandes, Forsberg, Bruce Rider, Farjalla, Vinícius Fortes |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Biogeochemistry
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/17285 |
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oai:repositorio:1-17285 |
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oai:repositorio:1-17285 Carbon dioxide outgassing from Amazonian aquatic ecosystems in the Negro River basin Scofield, Vinicius Melack, John M. Barbosa, Pedro Maia Amaral, João Henrique Fernandes Forsberg, Bruce Rider Farjalla, Vinícius Fortes Aquatic Ecosystem Biogenic Emission Carbon Dioxide Carbon Flux Degassing Floodplain Forest Ecosystem Partial Pressure Shrub Tributary Tropical Environment Vegetation Cover Amazon Basin Amazonia Rio Negro Basin Outgassing of biogenic gases from river systems is observed widely, and tropical rivers and their extensive floodplains are likely to be large sources. By combining the first regional survey of CO2 outgassing from rivers and floodplains in the Amazonian Negro River basin with areal coverage of habitats, we demonstrate large CO2 fluxes from these dissolved organic carbon-rich waters. We conducted measurements of pCO2 and calculations of CO2 outgassing from the water to the atmosphere in river channels and floodplains, including seasonally flooded forests (igapó) and shrubs (campinas), of the Negro River and 21 of its tributaries, in both high (2011) and low (2012) water phases. CO2 outgassing averaged 96 ± 48 mmol C m−2 day−1 during low water and 253 ± 193 mmol C m−2 day−1 during high water. We observed lower rates of CO2 outgassing in vegetated habitats in comparison to the river channels, due mainly to lower wind speeds. Regional CO2 outgassing was determined based on average CO2 emissions in each habitat and the area covered by each category of aquatic habitat in the basin. Our estimate of total CO2 emission from the basin is 35.1 ± 4.3 Tg C year−1. These results add to the current understanding of the role of Amazonian rivers and floodplains in local, regional and global estimates CO2 emission from inland aquatic ecosystems. © 2016, Springer International Publishing Switzerland. 2020-06-15T21:40:48Z 2020-06-15T21:40:48Z 2016 Artigo https://repositorio.inpa.gov.br/handle/1/17285 10.1007/s10533-016-0220-x en Volume 129, Número 1-2, Pags. 77-91 Restrito Biogeochemistry |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Aquatic Ecosystem Biogenic Emission Carbon Dioxide Carbon Flux Degassing Floodplain Forest Ecosystem Partial Pressure Shrub Tributary Tropical Environment Vegetation Cover Amazon Basin Amazonia Rio Negro Basin |
| spellingShingle |
Aquatic Ecosystem Biogenic Emission Carbon Dioxide Carbon Flux Degassing Floodplain Forest Ecosystem Partial Pressure Shrub Tributary Tropical Environment Vegetation Cover Amazon Basin Amazonia Rio Negro Basin Scofield, Vinicius Carbon dioxide outgassing from Amazonian aquatic ecosystems in the Negro River basin |
| topic_facet |
Aquatic Ecosystem Biogenic Emission Carbon Dioxide Carbon Flux Degassing Floodplain Forest Ecosystem Partial Pressure Shrub Tributary Tropical Environment Vegetation Cover Amazon Basin Amazonia Rio Negro Basin |
| description |
Outgassing of biogenic gases from river systems is observed widely, and tropical rivers and their extensive floodplains are likely to be large sources. By combining the first regional survey of CO2 outgassing from rivers and floodplains in the Amazonian Negro River basin with areal coverage of habitats, we demonstrate large CO2 fluxes from these dissolved organic carbon-rich waters. We conducted measurements of pCO2 and calculations of CO2 outgassing from the water to the atmosphere in river channels and floodplains, including seasonally flooded forests (igapó) and shrubs (campinas), of the Negro River and 21 of its tributaries, in both high (2011) and low (2012) water phases. CO2 outgassing averaged 96 ± 48 mmol C m−2 day−1 during low water and 253 ± 193 mmol C m−2 day−1 during high water. We observed lower rates of CO2 outgassing in vegetated habitats in comparison to the river channels, due mainly to lower wind speeds. Regional CO2 outgassing was determined based on average CO2 emissions in each habitat and the area covered by each category of aquatic habitat in the basin. Our estimate of total CO2 emission from the basin is 35.1 ± 4.3 Tg C year−1. These results add to the current understanding of the role of Amazonian rivers and floodplains in local, regional and global estimates CO2 emission from inland aquatic ecosystems. © 2016, Springer International Publishing Switzerland. |
| format |
Artigo |
| author |
Scofield, Vinicius |
| author2 |
Melack, John M. Barbosa, Pedro Maia Amaral, João Henrique Fernandes Forsberg, Bruce Rider Farjalla, Vinícius Fortes |
| author2Str |
Melack, John M. Barbosa, Pedro Maia Amaral, João Henrique Fernandes Forsberg, Bruce Rider Farjalla, Vinícius Fortes |
| title |
Carbon dioxide outgassing from Amazonian aquatic ecosystems in the Negro River basin |
| title_short |
Carbon dioxide outgassing from Amazonian aquatic ecosystems in the Negro River basin |
| title_full |
Carbon dioxide outgassing from Amazonian aquatic ecosystems in the Negro River basin |
| title_fullStr |
Carbon dioxide outgassing from Amazonian aquatic ecosystems in the Negro River basin |
| title_full_unstemmed |
Carbon dioxide outgassing from Amazonian aquatic ecosystems in the Negro River basin |
| title_sort |
carbon dioxide outgassing from amazonian aquatic ecosystems in the negro river basin |
| publisher |
Biogeochemistry |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/17285 |
| _version_ |
1787142955659689984 |
| score |
11.755432 |