Turbulence and Gas Transfer Velocities in Sheltered Flooded Forests of the Amazon Basin
Seasonally flooded forests along tropical rivers cover extensive areas, yet the processes driving air-water exchanges of radiatively active gases are uncertain. To quantify the controls on gas transfer velocities, we combined measurements of water-column temperature, meteorology in the forest and ad...
| Autor principal: | MacIntyre, Sally |
|---|---|
| Outros Autores: | Fernandes Amaral, Joao H., Barbosa, Pedro Maia, Cortés, Alicia, Forsberg, Bruce Rider, Melack, John M. |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Geophysical Research Letters
2020
|
| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/15506 |
| id |
oai:repositorio:1-15506 |
|---|---|
| recordtype |
dspace |
| spelling |
oai:repositorio:1-15506 Turbulence and Gas Transfer Velocities in Sheltered Flooded Forests of the Amazon Basin MacIntyre, Sally Fernandes Amaral, Joao H. Barbosa, Pedro Maia Cortés, Alicia Forsberg, Bruce Rider Melack, John M. Air Budget Control Buoyancy Floods Forestry Gases Heat Flux Kinetic Energy Kinetics Turbulent Flow Acoustic Doppler Velocimeter Buoyancy Fluxes Flood-plains Gas Flux Surface Energy Budget Tropical Lakes Turbulence Productions Turbulent Kinetic Energy Turbulence Buoyancy Energy Budget Energy Dissipation Floodplain Gas Flow Heat Flux Kinetic Energy Meteorology Open Water Energy Surface Tropical Environment Turbulence Water Column Amazon Basin Seasonally flooded forests along tropical rivers cover extensive areas, yet the processes driving air-water exchanges of radiatively active gases are uncertain. To quantify the controls on gas transfer velocities, we combined measurements of water-column temperature, meteorology in the forest and adjacent open water, turbulence with an acoustic Doppler velocimeter, gas concentrations, and fluxes with floating chambers. Under cooling, measured turbulence, quantified as the rate of dissipation of turbulent kinetic energy (ε), was similar to buoyancy flux computed from the surface energy budget, indicating convection dominated turbulence production. Under heating, turbulence was suppressed unless winds in the adjacent open water exceeded 1 m/s. Gas transfer velocities obtained from chamber measurements ranged from 1 to 5 cm/hr and were similar to or slightly less than predicted using a turbulence-based surface renewal model computed with measured ε and ε predicted from wind and cooling. ©2019. The Authors. 2020-05-14T16:32:34Z 2020-05-14T16:32:34Z 2019 Artigo https://repositorio.inpa.gov.br/handle/1/15506 10.1029/2019GL083948 en Volume 46, Número 16, Pags. 9628-9636 Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ application/pdf Geophysical Research Letters |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Air Budget Control Buoyancy Floods Forestry Gases Heat Flux Kinetic Energy Kinetics Turbulent Flow Acoustic Doppler Velocimeter Buoyancy Fluxes Flood-plains Gas Flux Surface Energy Budget Tropical Lakes Turbulence Productions Turbulent Kinetic Energy Turbulence Buoyancy Energy Budget Energy Dissipation Floodplain Gas Flow Heat Flux Kinetic Energy Meteorology Open Water Energy Surface Tropical Environment Turbulence Water Column Amazon Basin |
| spellingShingle |
Air Budget Control Buoyancy Floods Forestry Gases Heat Flux Kinetic Energy Kinetics Turbulent Flow Acoustic Doppler Velocimeter Buoyancy Fluxes Flood-plains Gas Flux Surface Energy Budget Tropical Lakes Turbulence Productions Turbulent Kinetic Energy Turbulence Buoyancy Energy Budget Energy Dissipation Floodplain Gas Flow Heat Flux Kinetic Energy Meteorology Open Water Energy Surface Tropical Environment Turbulence Water Column Amazon Basin MacIntyre, Sally Turbulence and Gas Transfer Velocities in Sheltered Flooded Forests of the Amazon Basin |
| topic_facet |
Air Budget Control Buoyancy Floods Forestry Gases Heat Flux Kinetic Energy Kinetics Turbulent Flow Acoustic Doppler Velocimeter Buoyancy Fluxes Flood-plains Gas Flux Surface Energy Budget Tropical Lakes Turbulence Productions Turbulent Kinetic Energy Turbulence Buoyancy Energy Budget Energy Dissipation Floodplain Gas Flow Heat Flux Kinetic Energy Meteorology Open Water Energy Surface Tropical Environment Turbulence Water Column Amazon Basin |
| description |
Seasonally flooded forests along tropical rivers cover extensive areas, yet the processes driving air-water exchanges of radiatively active gases are uncertain. To quantify the controls on gas transfer velocities, we combined measurements of water-column temperature, meteorology in the forest and adjacent open water, turbulence with an acoustic Doppler velocimeter, gas concentrations, and fluxes with floating chambers. Under cooling, measured turbulence, quantified as the rate of dissipation of turbulent kinetic energy (ε), was similar to buoyancy flux computed from the surface energy budget, indicating convection dominated turbulence production. Under heating, turbulence was suppressed unless winds in the adjacent open water exceeded 1 m/s. Gas transfer velocities obtained from chamber measurements ranged from 1 to 5 cm/hr and were similar to or slightly less than predicted using a turbulence-based surface renewal model computed with measured ε and ε predicted from wind and cooling. ©2019. The Authors. |
| format |
Artigo |
| author |
MacIntyre, Sally |
| author2 |
Fernandes Amaral, Joao H. Barbosa, Pedro Maia Cortés, Alicia Forsberg, Bruce Rider Melack, John M. |
| author2Str |
Fernandes Amaral, Joao H. Barbosa, Pedro Maia Cortés, Alicia Forsberg, Bruce Rider Melack, John M. |
| title |
Turbulence and Gas Transfer Velocities in Sheltered Flooded Forests of the Amazon Basin |
| title_short |
Turbulence and Gas Transfer Velocities in Sheltered Flooded Forests of the Amazon Basin |
| title_full |
Turbulence and Gas Transfer Velocities in Sheltered Flooded Forests of the Amazon Basin |
| title_fullStr |
Turbulence and Gas Transfer Velocities in Sheltered Flooded Forests of the Amazon Basin |
| title_full_unstemmed |
Turbulence and Gas Transfer Velocities in Sheltered Flooded Forests of the Amazon Basin |
| title_sort |
turbulence and gas transfer velocities in sheltered flooded forests of the amazon basin |
| publisher |
Geophysical Research Letters |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/15506 |
| _version_ |
1787142088340537344 |
| score |
11.680425 |