HR: 11:05h
AN: GC22A-04    [Abstracts]
TI: Measuring and Modeling CO2 fluxes over a Tropical Deciduous Forest
AU: * Garcia-Calleja, M
EM: tracyk1@hotmail.com
AF: Instituto Tecnologico de Sonora, 5 de Febrero 818 Sur, Cd. Obregon, Son 85000, Mexico
AU: Payan, J G
EM: garatuza@itson.edu.mx
AF: Instituto Tecnologico de Sonora, 5 de Febrero 818 Sur, Cd. Obregon, Son 85000, Mexico
AU: Perez-Ruiz, E R
EM: qeliperez@gmail.com
AF: Instituto Tecnologico de Sonora, 5 de Febrero 818 Sur, Cd. Obregon, Son 85000, Mexico
AU: Watts, C J
EM: watts@nirvana.uson.mx
AF: Universidad de Sonora, Blvd. Luis Encinas y Rosales, Hermosillo, Son , Mexico
AB: The Kyoto protocol propose to pay for carbon sequestration if that can be demonstrated besides the helping protecting and conserving the vegetation of that ecosystem. In Sonora the 18.72% is forest and the 9.33% is deciduous low forest. This will be the first investigation of this kind made in Mexico Norwest and the achievement of it, is very important for the habitants of the region since the environmental services do not include this part of the national territory in spite of its perturbation levels. This study demonstrates that the deciduous low forest is a potential candidate on CO2 sequestration. La Estrella, is a small community located in Rosario, Tesopaco, Southwest of Sonora, Mexico. In this community there is a micrometeorological tower to measure variables to model. In this model, carbon flows is related with variables such as: temperature, moisture (humidity), solar radiation, leaf area index, speed and wind direction. These variables were studied from August 2004 to December 2006, and the results showed the same relation between all these variables. The results obtained indicated that the CO2 fluxes (FCO2) are directly proportional to the temperature (Temp), solar radiation (AvgSR), leaf area index (IAF), precipitation (Rain) and relative humidity (AvgRH) and inversely proportional to wind velocity (WSK) and direction (DIR). The direct relation between FCO2 - Temp and FCO2 - solar radiation was successfully demonstrated since this phenomenon occurs at noon. While the temperature increases, and the photosynthesis process takes place, CO2 sequestration occurs. Furthermore, on the relationship between FCO2 - IAF during rainy season (jun-sept), the high results of IAF are directly related with the carbon sequestration; while higher is the IAF, the higher is the amount of CO2 that is being sequestrated. The data shows that during months with higher precipitations, from June to September, where the meteorization phenomenon is developed, the absorption of CO2 from the atmosphere and reinforcing the capture of CO2, happens. In this manner it was possible to analyze the direct relation between the FCO2-Rain and FCO2-AvgRH. On the other matter, it was possible to understand the inverse relation of FCO2-WSK, FCO2-DIR, since CO2 contained in the air wouldn't be absorbed in the possible carbon capture sources, it wouldn't be possible to happen. From our previous results, it con be concluded that FCO2 is directly related with Temperature, IAF, Rain, AvgHR and inversely proportional to WSK and DIR, on such a way that if the variables increase, FCO2 will increase too; however, if the variables are inversely proportional they will be affected and they will decrease, so FCO2 will then decrease too.
DE: 0426 Biosphere/atmosphere interactions (0315)
DE: 0428 Carbon cycling (4806)
DE: 1615 Biogeochemical cycles, processes, and modeling (0412, 0414, 0793, 4805, 4912)
SC: Global Climate Change [GC]
MN: 2007 Joint Assembly