Evapotranspiration
We review the measurements of latent and sensible heat flux made at seven flux tower sites during the Large-Scale Biosphere-Atmosphere Experiment for tropical humid, transitional and semideciduous forests, floodplain (with cerrado), and cerrado ecosystems. Measurements over farmlands in Amazonia var...
| Autor principal: | Rocha, Humberto Ribeiro da |
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| Outros Autores: | Manzi, Antônio Ocimar, Shuttleworth, William James |
| Grau: | Capítulo de Livro |
| Idioma: | English |
| Publicado em: |
Amazonia and Global Change
2020
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| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/19922 |
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oai:repositorio:1-19922 |
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dspace |
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oai:repositorio:1-19922 Evapotranspiration Rocha, Humberto Ribeiro da Manzi, Antônio Ocimar Shuttleworth, William James Banks (bodies Of Water) Biospherics Drought Evapotranspiration Floods Forestry Heat Flux Rivers Soil Moisture Tropics Amazon River Atmospheric Reanalysis Large-scale Biosphere-atmosphere Experiments Measurements Of Seasonal Evapotranspirations Semi-deciduous Sensible Heat Flux Tropical Forest Soil Surveys We review the measurements of latent and sensible heat flux made at seven flux tower sites during the Large-Scale Biosphere-Atmosphere Experiment for tropical humid, transitional and semideciduous forests, floodplain (with cerrado), and cerrado ecosystems. Measurements over farmlands in Amazonia vary from 1.2 (for bare soil) to 3 mm d-1, with a reduction in the dry season. Estimates of evapotranspiration for Amazonia based on atmospheric reanalysis are generally higher than the measurements. Remarkably, for all the seven sites, the mean annual sensible heat flux ranged from 20 to 38 W m-2, lower during the wet season and higher in the late dry season, consistent with the variation of net radiation and soil moisture. Based on the seasonal evapotranspiration, the sites are divided into two functional groups: tropical forest and savanna. At the northern sites (Manaus, Santarém), precipitation is above 1900 mm a-1, monthly evapotranspiration is fairly constant during the wet season, ranges from 2.8 to 3.6 mm d-1, progressively increases along the dry season up to 4 mm d-1, and is dominated by net radiation and vapor density deficit. The western semideciduous forest in Rondônia presents similarities with the forest group, with monthly evapotranspiration that varies little but concurrent with net radiation year round, and peaks more exactly in the dryto- wet season transition. At the southern and eastern sites, precipitation is below 1700 mm a-1, seasonal evapotranspiration is limited by soil moisture, ranges from 3 to 4 mm d-1 in the wet season, and decreases in the dry season to 2.5 mm d-1 in the transitional forest (Mato Grosso) and floodplain (Tocantins), and to 1 mm d-1 in the São Paulo cerrado. © 2009 by the American Geophysical Union. All rights reserved. 2020-06-16T15:04:43Z 2020-06-16T15:04:43Z 2013 Capítulo de Livro https://repositorio.inpa.gov.br/handle/1/19922 10.1029/2008GM000817 en Pags. 261-272 Restrito Amazonia and Global Change |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Banks (bodies Of Water) Biospherics Drought Evapotranspiration Floods Forestry Heat Flux Rivers Soil Moisture Tropics Amazon River Atmospheric Reanalysis Large-scale Biosphere-atmosphere Experiments Measurements Of Seasonal Evapotranspirations Semi-deciduous Sensible Heat Flux Tropical Forest Soil Surveys |
| spellingShingle |
Banks (bodies Of Water) Biospherics Drought Evapotranspiration Floods Forestry Heat Flux Rivers Soil Moisture Tropics Amazon River Atmospheric Reanalysis Large-scale Biosphere-atmosphere Experiments Measurements Of Seasonal Evapotranspirations Semi-deciduous Sensible Heat Flux Tropical Forest Soil Surveys Rocha, Humberto Ribeiro da Evapotranspiration |
| topic_facet |
Banks (bodies Of Water) Biospherics Drought Evapotranspiration Floods Forestry Heat Flux Rivers Soil Moisture Tropics Amazon River Atmospheric Reanalysis Large-scale Biosphere-atmosphere Experiments Measurements Of Seasonal Evapotranspirations Semi-deciduous Sensible Heat Flux Tropical Forest Soil Surveys |
| description |
We review the measurements of latent and sensible heat flux made at seven flux tower sites during the Large-Scale Biosphere-Atmosphere Experiment for tropical humid, transitional and semideciduous forests, floodplain (with cerrado), and cerrado ecosystems. Measurements over farmlands in Amazonia vary from 1.2 (for bare soil) to 3 mm d-1, with a reduction in the dry season. Estimates of evapotranspiration for Amazonia based on atmospheric reanalysis are generally higher than the measurements. Remarkably, for all the seven sites, the mean annual sensible heat flux ranged from 20 to 38 W m-2, lower during the wet season and higher in the late dry season, consistent with the variation of net radiation and soil moisture. Based on the seasonal evapotranspiration, the sites are divided into two functional groups: tropical forest and savanna. At the northern sites (Manaus, Santarém), precipitation is above 1900 mm a-1, monthly evapotranspiration is fairly constant during the wet season, ranges from 2.8 to 3.6 mm d-1, progressively increases along the dry season up to 4 mm d-1, and is dominated by net radiation and vapor density deficit. The western semideciduous forest in Rondônia presents similarities with the forest group, with monthly evapotranspiration that varies little but concurrent with net radiation year round, and peaks more exactly in the dryto- wet season transition. At the southern and eastern sites, precipitation is below 1700 mm a-1, seasonal evapotranspiration is limited by soil moisture, ranges from 3 to 4 mm d-1 in the wet season, and decreases in the dry season to 2.5 mm d-1 in the transitional forest (Mato Grosso) and floodplain (Tocantins), and to 1 mm d-1 in the São Paulo cerrado. © 2009 by the American Geophysical Union. All rights reserved. |
| format |
Capítulo de Livro |
| author |
Rocha, Humberto Ribeiro da |
| author2 |
Manzi, Antônio Ocimar Shuttleworth, William James |
| author2Str |
Manzi, Antônio Ocimar Shuttleworth, William James |
| title |
Evapotranspiration |
| title_short |
Evapotranspiration |
| title_full |
Evapotranspiration |
| title_fullStr |
Evapotranspiration |
| title_full_unstemmed |
Evapotranspiration |
| title_sort |
evapotranspiration |
| publisher |
Amazonia and Global Change |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/19922 |
| _version_ |
1787144567701635072 |
| score |
11.653393 |