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INSTITUTO DE PESQUISAS ENERGÉTICAS E NUCLEARES Autarquia associada à Universidade de São Paulo ESTUDO DE ORGANIZAÇÃO EM REDE NA METROLOGIA EM QUÍMICA
| Content Provider | Semantic Scholar |
|---|---|
| Author | Ponçano, Vera Maria Lopes |
| Copyright Year | 2007 |
| Abstract | The Amazon plays an important role on the global carbon cycle, as changing as carbon storage, since Amazon Basin is the biggest area of tropical forest, around 50% of global. Natural's process, deforestation, and use land are CO2 sources. The Amazon forest is a significant source of N2O by soil process, and CH4 by anaerobic process like flooded areas, rice cultures, and others sources. This project is part of the LBA project (Large-Scale BiosphereAtmosphere Experiment in Amazônia), and this project is “Vertical profiles of carbon dioxide and other trace gas species over the Amazon basin using small aircraft”. Since December 2000 vertical profiles of CO2, CH4, CO, H2, N2O and SF6 have been measured above central Amazônia. The local sampling was over Tapajós National Forest, a primary forest in Para State, where had a CO2 flux tower and an east impact area with sources like animals, rice cultivation, biomass burning, etc, to compare the influence of an impact area and a preserved area in the profiles. The Reserva Biológica de Cuieiras, at Amazon State, is the other studied place, where there already exists a CO2 flux tower, and an east preserved area at this State, to comparer with the Cuieiras. The sampling has been carried out on vertical profile from 1000 ft up to 12000 ft using a semi-automated sampling package developed at GMD/NOAA and a small aircraft. The analysis uses the MAGICC system (Multiple Analysis of Gases Influence Climate Change) which is installed at the Atmospheric Chemistry Laboratory (LQA) in IPEN (Instituto de Pesquisas Energéticas e Nucleares). The results showed that all gases studied, except H2 gas, has been following the global trend. At the Pará State, for the studied years, the Amazonian Forest performed as small CO2 sink. To compare Wet and Dry Seasons, subtracted the Ascension concentration values in the period to remove the global influence. So that, in the 2004 and 2005 wet seasons and 2004 dry season |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://teses.usp.br/teses/disponiveis/85/85134/tde-22052007-141134/publico/DissertacaoMonicaTaisSiqueiraDAmelio.pdf |
| Alternate Webpage(s) | http://pelicano.ipen.br/PosG30/TextoCompleto/Marycel%20Elena%20Barboza%20Cotrim_D.pdf |
| Alternate Webpage(s) | http://pelicano.ipen.br/PosG30/TextoCompleto/Antonio%20Carlos%20Nogueira%20Neto_M.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
