Carbon dioxide transfer over a Central Amazonian rain forest
Tropical rain forests are among the most important and least monitored of terrestrial ecosystems. In recent years, their influence on atmospheric concentrations of carbon dioxide and water vapor has become the subject of much speculation. Here we present results from a yearlong study of CO2 fluxes a...
| Autor principal: | Malhi, Yadvinder Singh |
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| Outros Autores: | Nobre, Antônio Donato, Grace, John, Kruijt, Bart J., Pereira, Maria G.P., Culf, Alistair D., Scott, Steve L. |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Journal of Geophysical Research Atmospheres
2020
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| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/19304 |
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oai:repositorio:1-19304 |
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oai:repositorio:1-19304 Carbon dioxide transfer over a Central Amazonian rain forest Malhi, Yadvinder Singh Nobre, Antônio Donato Grace, John Kruijt, Bart J. Pereira, Maria G.P. Culf, Alistair D. Scott, Steve L. Boundary Layer Carbon Dioxide Gas Exchange Rainforest Tropical Forest Amazonia South America Tropical rain forests are among the most important and least monitored of terrestrial ecosystems. In recent years, their influence on atmospheric concentrations of carbon dioxide and water vapor has become the subject of much speculation. Here we present results from a yearlong study of CO2 fluxes at a tropical forest in central Amazonia, using the micrometeorological technique of eddy covariance. The diurnal cycle of CO2 flux was consistent with previous short-term studies in tropical rain forests, implying that the Amazonian rain forest shows a fair degree of spatial uniformity in bulk ecophysiological characteristics. Typical peak daytime photosynthesis rates were 24-28 μmol CO2 m-2 s-1, and respiration rates were 6-8 μmol CO2 m-2 s-1. There was significant seasonality in peak photosynthesis over the year, which appeared strongly correlated with soil moisture content. On the other hand, there was no evidence of strong seasonality in soil respiration. Central Amazonia has only a short, 3-month dry season, not atypical of tropical rain forest, and it is therefore likely that large areas of Amazonia exhibit significant seasonality in photosynthetic capacity. The gross primary production was calculated to be 30 t C ha-1 yr-1. An analysis of data quality is included in the appendix. Copyright 1998 by the American Geophysical Union. 2020-06-15T22:07:12Z 2020-06-15T22:07:12Z 1998 Artigo https://repositorio.inpa.gov.br/handle/1/19304 10.1029/98JD02647 en Volume 103, Número D24, Pags. 31593-31612 Restrito Journal of Geophysical Research Atmospheres |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Boundary Layer Carbon Dioxide Gas Exchange Rainforest Tropical Forest Amazonia South America |
| spellingShingle |
Boundary Layer Carbon Dioxide Gas Exchange Rainforest Tropical Forest Amazonia South America Malhi, Yadvinder Singh Carbon dioxide transfer over a Central Amazonian rain forest |
| topic_facet |
Boundary Layer Carbon Dioxide Gas Exchange Rainforest Tropical Forest Amazonia South America |
| description |
Tropical rain forests are among the most important and least monitored of terrestrial ecosystems. In recent years, their influence on atmospheric concentrations of carbon dioxide and water vapor has become the subject of much speculation. Here we present results from a yearlong study of CO2 fluxes at a tropical forest in central Amazonia, using the micrometeorological technique of eddy covariance. The diurnal cycle of CO2 flux was consistent with previous short-term studies in tropical rain forests, implying that the Amazonian rain forest shows a fair degree of spatial uniformity in bulk ecophysiological characteristics. Typical peak daytime photosynthesis rates were 24-28 μmol CO2 m-2 s-1, and respiration rates were 6-8 μmol CO2 m-2 s-1. There was significant seasonality in peak photosynthesis over the year, which appeared strongly correlated with soil moisture content. On the other hand, there was no evidence of strong seasonality in soil respiration. Central Amazonia has only a short, 3-month dry season, not atypical of tropical rain forest, and it is therefore likely that large areas of Amazonia exhibit significant seasonality in photosynthetic capacity. The gross primary production was calculated to be 30 t C ha-1 yr-1. An analysis of data quality is included in the appendix. Copyright 1998 by the American Geophysical Union. |
| format |
Artigo |
| author |
Malhi, Yadvinder Singh |
| author2 |
Nobre, Antônio Donato Grace, John Kruijt, Bart J. Pereira, Maria G.P. Culf, Alistair D. Scott, Steve L. |
| author2Str |
Nobre, Antônio Donato Grace, John Kruijt, Bart J. Pereira, Maria G.P. Culf, Alistair D. Scott, Steve L. |
| title |
Carbon dioxide transfer over a Central Amazonian rain forest |
| title_short |
Carbon dioxide transfer over a Central Amazonian rain forest |
| title_full |
Carbon dioxide transfer over a Central Amazonian rain forest |
| title_fullStr |
Carbon dioxide transfer over a Central Amazonian rain forest |
| title_full_unstemmed |
Carbon dioxide transfer over a Central Amazonian rain forest |
| title_sort |
carbon dioxide transfer over a central amazonian rain forest |
| publisher |
Journal of Geophysical Research Atmospheres |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/19304 |
| _version_ |
1787142117000216576 |
| score |
11.653393 |