Amazon Atlantic outflow region carbon cycling constrained by atmospheric greenhouse gas data
Estuaries and near-coastal regions may process substantial amounts of carbon causing a nonnegligible carbon uptake from the atmosphere. For purpose of characterizing the greenhouse gas levels of air entering the Amazon basin from the Atlantic we have been measuring regularly greenhouse gas concentra...
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ftipen:oai:repositorio.ipen.br:123456789/29148 2023-11-12T04:22:58+01:00 Amazon Atlantic outflow region carbon cycling constrained by atmospheric greenhouse gas data BORGES, VIVIANE F. GATTI, LUCIANA V. GLOOR, EMANUEL U. MILLER, JOHN B. BOESCH, HARTMUT DOMINGUES, LUCAS G. CORREIA, CAIO S. de C. BASSO, LUANA S. SANTOS, RICARDO S. INTERNATIONAL CARBON DIOXIDE CONFERENCE, 10th I August 21-25, 2017 137-137 http://repositorio.ipen.br/handle/123456789/29148 unknown Swiss Academy of Sciences (SCNAT) http://repositorio.ipen.br/handle/123456789/29148 openAccess Resumo de eventos cient??ficos 2017 ftipen 2023-10-30T16:28:39Z Estuaries and near-coastal regions may process substantial amounts of carbon causing a nonnegligible carbon uptake from the atmosphere. For purpose of characterizing the greenhouse gas levels of air entering the Amazon basin from the Atlantic we have been measuring regularly greenhouse gas concentrations at several sites along the North-East Atlantic coast of Brazil over approximately the past six years (at some of the sites for much longer). At some of the sites sampling is restricted close to the surface while at other sites we have been measuring vertical profiles. At Salinopolis which is located close to the Amazon outflow region to the Atlantic seasonally strong CO2 depletion in both surface records and aircraft vertical profiles compared to background sites like Ascension Island is clearly discernible. The seasonality is synchronous with increases in chlorophyll observed from space e.g. by the SeaWiFS mission. Incidentally during the CO2 depletion period airmass trajectories tend to pass over the shelf region along the Brazilian coast travelling from the South along the coast. This enables us to apply an air column mass balance approach to estimate the magnitude of the CO2 flux into the sea along the coast during the blooms. Using the chlorophyll maps we may furthermore extrapolate the flux estimates spatially to obtain an area integrated flux. We will discuss our findings and put our flux estimates into perspective with estimates for productivity and carbon uptake in coastal regions of major tropical rivers as well as the extra-tropics. Acknowledgment: CNPq, NERC, FAPESP, MCTI, NOAA, IPEN and INPE. Other/Unknown Material North East Atlantic Repositório Digital do IPEN (Instituto de Pesquisas Energéticas e Nucleares) |
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Repositório Digital do IPEN (Instituto de Pesquisas Energéticas e Nucleares) |
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ftipen |
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description |
Estuaries and near-coastal regions may process substantial amounts of carbon causing a nonnegligible carbon uptake from the atmosphere. For purpose of characterizing the greenhouse gas levels of air entering the Amazon basin from the Atlantic we have been measuring regularly greenhouse gas concentrations at several sites along the North-East Atlantic coast of Brazil over approximately the past six years (at some of the sites for much longer). At some of the sites sampling is restricted close to the surface while at other sites we have been measuring vertical profiles. At Salinopolis which is located close to the Amazon outflow region to the Atlantic seasonally strong CO2 depletion in both surface records and aircraft vertical profiles compared to background sites like Ascension Island is clearly discernible. The seasonality is synchronous with increases in chlorophyll observed from space e.g. by the SeaWiFS mission. Incidentally during the CO2 depletion period airmass trajectories tend to pass over the shelf region along the Brazilian coast travelling from the South along the coast. This enables us to apply an air column mass balance approach to estimate the magnitude of the CO2 flux into the sea along the coast during the blooms. Using the chlorophyll maps we may furthermore extrapolate the flux estimates spatially to obtain an area integrated flux. We will discuss our findings and put our flux estimates into perspective with estimates for productivity and carbon uptake in coastal regions of major tropical rivers as well as the extra-tropics. Acknowledgment: CNPq, NERC, FAPESP, MCTI, NOAA, IPEN and INPE. |
format |
Other/Unknown Material |
author |
BORGES, VIVIANE F. GATTI, LUCIANA V. GLOOR, EMANUEL U. MILLER, JOHN B. BOESCH, HARTMUT DOMINGUES, LUCAS G. CORREIA, CAIO S. de C. BASSO, LUANA S. SANTOS, RICARDO S. INTERNATIONAL CARBON DIOXIDE CONFERENCE, 10th |
spellingShingle |
BORGES, VIVIANE F. GATTI, LUCIANA V. GLOOR, EMANUEL U. MILLER, JOHN B. BOESCH, HARTMUT DOMINGUES, LUCAS G. CORREIA, CAIO S. de C. BASSO, LUANA S. SANTOS, RICARDO S. INTERNATIONAL CARBON DIOXIDE CONFERENCE, 10th Amazon Atlantic outflow region carbon cycling constrained by atmospheric greenhouse gas data |
author_facet |
BORGES, VIVIANE F. GATTI, LUCIANA V. GLOOR, EMANUEL U. MILLER, JOHN B. BOESCH, HARTMUT DOMINGUES, LUCAS G. CORREIA, CAIO S. de C. BASSO, LUANA S. SANTOS, RICARDO S. INTERNATIONAL CARBON DIOXIDE CONFERENCE, 10th |
author_sort |
BORGES, VIVIANE F. |
title |
Amazon Atlantic outflow region carbon cycling constrained by atmospheric greenhouse gas data |
title_short |
Amazon Atlantic outflow region carbon cycling constrained by atmospheric greenhouse gas data |
title_full |
Amazon Atlantic outflow region carbon cycling constrained by atmospheric greenhouse gas data |
title_fullStr |
Amazon Atlantic outflow region carbon cycling constrained by atmospheric greenhouse gas data |
title_full_unstemmed |
Amazon Atlantic outflow region carbon cycling constrained by atmospheric greenhouse gas data |
title_sort |
amazon atlantic outflow region carbon cycling constrained by atmospheric greenhouse gas data |
publisher |
Swiss Academy of Sciences (SCNAT) |
publishDate |
2017 |
url |
http://repositorio.ipen.br/handle/123456789/29148 |
op_coverage |
I |
genre |
North East Atlantic |
genre_facet |
North East Atlantic |
op_relation |
http://repositorio.ipen.br/handle/123456789/29148 |
op_rights |
openAccess |
_version_ |
1782337885489332224 |