Patterns and controls of carbon dioxide and water vapor fluxes in a dry forest of central Argentina
Covering 16% of global land surface, dry forests play a key role in the global carbon budget. The Southern Hemisphere still preserves a high proportion of its native dry forest cover, but deforestation rates have increased dramatically in the last decades. In this paper, we quantified for the first...
| Autores principales: | , , , , , , , |
|---|---|
| Formato: | info:eu-repo/semantics/article |
| Lenguaje: | Inglés |
| Publicado: |
Elsevier
2017
|
| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/1550 https://www.sciencedirect.com/science/article/pii/S0168192317302721 https://doi.org/10.1016/j.agrformet.2017.08.015 |
| _version_ | 1855034820305879040 |
|---|---|
| author | Garcia, Alfredo Gabriel Di Bella, Carlos Marcelo Houspanossian, Javier Magliano, Patricio Nicolás Jobbagy Gampel, Esteban Gabriel Posse Beaulieu, Gabriela Fernandez, Roberto J. Nosetto, Marcelo Daniel |
| author_browse | Di Bella, Carlos Marcelo Fernandez, Roberto J. Garcia, Alfredo Gabriel Houspanossian, Javier Jobbagy Gampel, Esteban Gabriel Magliano, Patricio Nicolás Nosetto, Marcelo Daniel Posse Beaulieu, Gabriela |
| author_facet | Garcia, Alfredo Gabriel Di Bella, Carlos Marcelo Houspanossian, Javier Magliano, Patricio Nicolás Jobbagy Gampel, Esteban Gabriel Posse Beaulieu, Gabriela Fernandez, Roberto J. Nosetto, Marcelo Daniel |
| author_sort | Garcia, Alfredo Gabriel |
| collection | INTA Digital |
| description | Covering 16% of global land surface, dry forests play a key role in the global carbon budget. The Southern Hemisphere still preserves a high proportion of its native dry forest cover, but deforestation rates have increased dramatically in the last decades. In this paper, we quantified for the first time the magnitude and temporal variability of carbon dioxide and water vapor fluxes and their environmental controls based on eddy covariance measurements in a dry forest site of central Argentina. Continuous measurements of CO2 and water vapor exchanges spanning a 15-month period (Dec. 2009 – March 2011) showed that the studied dry forest was a net sink of carbon, with an overall integrated net ecosystem exchange (NEE) of −172 g C m−2 (−132.8 g C m−2 for year 2010). The cool dry season (May–Sept.) accounted for a quarter of the total annual NEE of year 2010 with low but steady CO2 uptake rates (1 g C m−2 d−1 on average) that were more strongly associated with temperature than with soil moisture. By contrast, in the warm wet season (Oct.–April), almost three times greater CO2 uptake rates (2.7 g C m−2 d−1 on average) resulted from a highly pulsed behavior in which CO2 uptake showed sharp increases followed by rapid declines after rainfall events. Cumulative evapotranspiration (ET) during the whole study (595 mm) accounted for most of the rainfall inputs (674 mm), with daily water vapor fluxes during the wet season being four times greater compared to those observed during the dry season (1.7 mm d−1 vs. 0.45 mm d−1). Modeling of the partition of all evaporative water losses suggested that transpiration was the dominant vapor flux (67% of ET), followed by interception (20%) and soil evaporation (13%). The influence of air temperature on half-hourly CO2 fluxes was notably different for the dry and wet seasons. In the 11–34 °C air temperature range, CO2 uptake rates were higher in the warm wet rather than the cool dry season, yet this difference narrowed with temperatures >26 °C. The dry forest became a net CO2 source at 40 °C. Our study provides new insights about the functioning of dry forests and the likely response of their CO2 and water vapor exchange with the atmosphere under future climate and land use/cover changes. |
| format | info:eu-repo/semantics/article |
| id | INTA1550 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | INTA15502022-10-21T13:34:01Z Patterns and controls of carbon dioxide and water vapor fluxes in a dry forest of central Argentina Garcia, Alfredo Gabriel Di Bella, Carlos Marcelo Houspanossian, Javier Magliano, Patricio Nicolás Jobbagy Gampel, Esteban Gabriel Posse Beaulieu, Gabriela Fernandez, Roberto J. Nosetto, Marcelo Daniel Dióxido de Carbono Vapor de Agua Bosques Deforestación Carbon Dioxide Water Vapour Forests Deforestation CO2 Argentina Covering 16% of global land surface, dry forests play a key role in the global carbon budget. The Southern Hemisphere still preserves a high proportion of its native dry forest cover, but deforestation rates have increased dramatically in the last decades. In this paper, we quantified for the first time the magnitude and temporal variability of carbon dioxide and water vapor fluxes and their environmental controls based on eddy covariance measurements in a dry forest site of central Argentina. Continuous measurements of CO2 and water vapor exchanges spanning a 15-month period (Dec. 2009 – March 2011) showed that the studied dry forest was a net sink of carbon, with an overall integrated net ecosystem exchange (NEE) of −172 g C m−2 (−132.8 g C m−2 for year 2010). The cool dry season (May–Sept.) accounted for a quarter of the total annual NEE of year 2010 with low but steady CO2 uptake rates (1 g C m−2 d−1 on average) that were more strongly associated with temperature than with soil moisture. By contrast, in the warm wet season (Oct.–April), almost three times greater CO2 uptake rates (2.7 g C m−2 d−1 on average) resulted from a highly pulsed behavior in which CO2 uptake showed sharp increases followed by rapid declines after rainfall events. Cumulative evapotranspiration (ET) during the whole study (595 mm) accounted for most of the rainfall inputs (674 mm), with daily water vapor fluxes during the wet season being four times greater compared to those observed during the dry season (1.7 mm d−1 vs. 0.45 mm d−1). Modeling of the partition of all evaporative water losses suggested that transpiration was the dominant vapor flux (67% of ET), followed by interception (20%) and soil evaporation (13%). The influence of air temperature on half-hourly CO2 fluxes was notably different for the dry and wet seasons. In the 11–34 °C air temperature range, CO2 uptake rates were higher in the warm wet rather than the cool dry season, yet this difference narrowed with temperatures >26 °C. The dry forest became a net CO2 source at 40 °C. Our study provides new insights about the functioning of dry forests and the likely response of their CO2 and water vapor exchange with the atmosphere under future climate and land use/cover changes. Inst. de Clima y Agua Fil: Garcia, Alfredo Gabriel. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Clima y Agua; Argentina Fil: Di Bella, Carlos Marcelo. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Clima y Agua; Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Métodos Cuantitativos; Argentina Fil: Houspanossian, Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Matemática Aplicada de San Luis; Argentina. Universidad Nacional de San Luis; Argentina Fil: Magliano, Patricio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Matemática Aplicada de San Luis; Argentina. Universidad Nacional de San Luis; Argentina Fil: Jobbagy Gampel, Esteban Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Matemática Aplicada de San Luis; Argentina. Universidad Nacional de San Luis; Argentina Fil: Posse Beaulieu, Gabriela. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Clima y Agua; Argentina Fil: Nosetto, Marcelo Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de investigación Fisiológicas y Ecológicas Vinculado a la Agricultura. Universidad de Buenos Aires; Argentina. Universidad Nacional de Entre Ríos. Facultad de Ciencias Agropecuarias. Cátedra de Climatología; Argentina Fil: Fernandez, Roberto J. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de investigación Fisiológicas y Ecológicas Vinculado a la Agricultura. Universidad de Buenos Aires; Argentina 2017-10-20T13:58:22Z 2017-10-20T13:58:22Z 2017-12 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/acceptedVersion http://hdl.handle.net/20.500.12123/1550 https://www.sciencedirect.com/science/article/pii/S0168192317302721 0168-1923 https://doi.org/10.1016/j.agrformet.2017.08.015 eng info:eu-repo/semantics/restrictedAccess application/pdf Argentina (nation) Elsevier Agricultural and Forest Meteorology 247 : 520-532 (December 2017) |
| spellingShingle | Dióxido de Carbono Vapor de Agua Bosques Deforestación Carbon Dioxide Water Vapour Forests Deforestation CO2 Argentina Garcia, Alfredo Gabriel Di Bella, Carlos Marcelo Houspanossian, Javier Magliano, Patricio Nicolás Jobbagy Gampel, Esteban Gabriel Posse Beaulieu, Gabriela Fernandez, Roberto J. Nosetto, Marcelo Daniel Patterns and controls of carbon dioxide and water vapor fluxes in a dry forest of central Argentina |
| title | Patterns and controls of carbon dioxide and water vapor fluxes in a dry forest of central Argentina |
| title_full | Patterns and controls of carbon dioxide and water vapor fluxes in a dry forest of central Argentina |
| title_fullStr | Patterns and controls of carbon dioxide and water vapor fluxes in a dry forest of central Argentina |
| title_full_unstemmed | Patterns and controls of carbon dioxide and water vapor fluxes in a dry forest of central Argentina |
| title_short | Patterns and controls of carbon dioxide and water vapor fluxes in a dry forest of central Argentina |
| title_sort | patterns and controls of carbon dioxide and water vapor fluxes in a dry forest of central argentina |
| topic | Dióxido de Carbono Vapor de Agua Bosques Deforestación Carbon Dioxide Water Vapour Forests Deforestation CO2 Argentina |
| url | http://hdl.handle.net/20.500.12123/1550 https://www.sciencedirect.com/science/article/pii/S0168192317302721 https://doi.org/10.1016/j.agrformet.2017.08.015 |
| work_keys_str_mv | AT garciaalfredogabriel patternsandcontrolsofcarbondioxideandwatervaporfluxesinadryforestofcentralargentina AT dibellacarlosmarcelo patternsandcontrolsofcarbondioxideandwatervaporfluxesinadryforestofcentralargentina AT houspanossianjavier patternsandcontrolsofcarbondioxideandwatervaporfluxesinadryforestofcentralargentina AT maglianopatricionicolas patternsandcontrolsofcarbondioxideandwatervaporfluxesinadryforestofcentralargentina AT jobbagygampelestebangabriel patternsandcontrolsofcarbondioxideandwatervaporfluxesinadryforestofcentralargentina AT possebeaulieugabriela patternsandcontrolsofcarbondioxideandwatervaporfluxesinadryforestofcentralargentina AT fernandezrobertoj patternsandcontrolsofcarbondioxideandwatervaporfluxesinadryforestofcentralargentina AT nosettomarcelodaniel patternsandcontrolsofcarbondioxideandwatervaporfluxesinadryforestofcentralargentina |