Dissertações em Ciências Ambientais (Mestrado) - PPGCA/IG

URI Permanente para esta coleçãohttps://repositorio.ufpa.br/handle/2011/2855

O Mestrado Acadêmico em Ciências Ambientais teve início em 2005 e funciona no Programa de Pós-Graduação em Ciências Ambientais (PPGCA) do Instituto de Geociências (IG) da Universidade Federal do Pará (UFPA) em parceria com o Museu Paraense Emílio Goeldi (MPEG) e a Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA/Amazônia Oriental).

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Agora exibindo 1 - 14 de 14

Acesso aberto (Open Access)
Análise de alguns parâmetros de qualidade da água na baía do Guajará em Belém-PA e os efeitos do regime pluviométrico e de marés
(Universidade Federal do Pará, 2018-04-27) ARAÚJO, Vívian Evelyne Silva; ROCHA, Edson José Paulino da; http://lattes.cnpq.br/2313369423727020
Belém is located in the estuarine region, conformed by the Guajarino Estuary, which integrates the Marajoara Gulf, whose fluvial environment is formed at the confluence of the rivers Pará, Tocantins, Acará and Guamá (IPEA, 2016). The water level of the Guajarino Estuary presents fluctuations associated with the seasonal effect (seasonal variations of the rain in the hydrological basins) and the tide (variations of the tide level). The elaboration of this study is due to the fact that the seasonal variations seem to be associated to the environmental changes, that occur in the ecosystem, such as the effect of hydrological seasonality - tides and rainfall. The present study will analyze the physico-chemical components of the Guajará Bay water, relating them to the tides and the hydrological dynamics of the Guamá and Pará rivers, also in this research will be made the analysis of the role of precipitation in the alteration of the water bay physicochemical components. Initially, a descriptive statistic was made, verifying the values of the averages, of the maximum and minimum, facilitating to observe which are in agreement with the current resolution of CONAMA 357/2005. It was also applied the statistical method of Pearson correlation to evaluate the degree of relationship between variables, the correlation was first studied between physico-chemical parameters, thus, it was observed that the parameters that have a strong positive correlation were the electrical conductivity, TDS and salinitiy. The other parameters did not presented significative correlation, demonstrating that they were independent of each other. When applying the correlation between the physical-chemical parameters and the rainfall, no positive or negative correlation was found between these variables, meaning that the role of the rainfall city of Belém, was not mostly important in the variation of the physico-chemical components of the bay and this was also the case for the relationship between the parameters and the tide heights. The behavior graphs of the physical-chemical parameters, in relation to rainfall, showed that among the nine parameters analyzed, six parameters were altered, such as: pH, temperature, electrical conductivity, TDS, salinity, OD and Turbidity. These parameters have changed due to precipitation. The results of the parameters regardind the tides were observed among the nine parameters studied, decreasing the temperature, and increasing the values of electrical conductivity, TDS, salinity and turbidity.
Acesso aberto (Open Access)
Análise dos efeitos térmicos de superfície na cidade de Belém-Pará-Brasil utilizando imagens de satélite
(Universidade Federal do Pará, 2011-08-12) CORRÊA, Leda Vilhena; VITORINO, Maria Isabel; http://lattes.cnpq.br/4813399912998401
Using observational data of precipitation and air temperature from1967 to 2008, which drafted the climatology of these variables and analyzed the weather influenced by ENOS, were made an identification, characterization and analysis of spatial thermal effects in Belem (PA), from surface meteorological data and MODIS sensor images (which is prepared on a platform of the Aqua satellite). The average annual precipitation was 2978.6 mm/year, and presented an upward trend over the years, similar behavior has proved to the air temperature. In General, the results show two centers of greater intensity of surface temperatures: a center in Belem and another center in nearby town, Ananindeua. These centers vary spatially and temporally in intensity. During La Niña events, the center of heat island is located in the neighborhoods closest to Guajara Bay, while in the El Niño events, these neighborhoods have milder temperatures than the neighborhoods farther from water sources. The thermal amplitude of surface temperature between urban and rural areas varies greatly, with largest variation of 30,8°C and the lowest of 16,8°C. Thus, the highest surface temperatures were observed in neighborhoods with low NDVI, which is a consequence of a denser urbanization. Urban areas and most vegetated surfaces show cause/effect relationships very close, especially during the dry season, this can be realized by correlation that has value greater than 50%. This study presents results that assist in better understanding of behavior and spatial and temporal thermal effects in Belem, because the use of satellite images is important for the identification and characterization of climatic environmental conditions and urban heat islands.
Acesso aberto (Open Access)
Análise socioambiental do município de Belém, Pará: elementos para uma sustentabilidade urbana
(Universidade Federal do Pará, 2018-01-17) MOREIRA, Fernanda da Silva de Andrade; VITORINO, Maria Isabel; http://lattes.cnpq.br/4813399912998401
In recent centuries, the world witnessed "economic progress" at the expense of the exploitation of natural resources and significant urban growth, almost always disorderly, forming unprepared cities that can not manage properly and thus welcome the huge human contingent and absorb the social demands, making their populations vulnerable. In the city of Belém, which is one of the great cities of the Amazon, with more than one million inhabitants, the population is subject to a series of ills. The territory is permeated by a series of problems, be it social, economic and / or environmental, which prevents the city from reconciling the human-nature relationship and reaching the long-awaited sustainability. Thus, the present work aimed to map the social and environmental conditions of the city of Belém, on a macro scale, and a comparative analysis of two neighborhoods of the urban spot, Guamá and Nazaré, and based on this diagnosis, indicate Urban Planning methodology, which make that relationship compatible. The results pointed to precarious environmental and social conditions in the city of Belém, especially in the urban spot, which presents an urban space marked by degradation. These inadequate conditions can and should be addressed through Public Policies that incorporate environmental issues into their agendas, including the participation of society in decision making. Going further, it is necessary to guarantee apparatuses for an effective inspection of public organs, as well as of all citizens.
Acesso aberto (Open Access)
Balanço de energia e fluxos turbulentos associados à fatores físico-químicos da água na baía de Caxiuanã
(Universidade Federal do Pará, 2014) PINHEIRO, Amanda Nascimento; CATTANIO, José Henrique; http://lattes.cnpq.br/1518769773387350
Investigate the behavior of the energy balance on water surfaces is still a scientific challenge, since few studies are available on this topic in this type of surface. The flona of Caxiunã several years ago has become a major object of study for various field of science that support for the Amazon region. Among these fields lies the micrometeorology, which discusses among his main topics of interest are the phenomena of energy and mass exchange at the surface-atmosphere interface. Aiming to fill this lack of information, in this study the hourly and seasonal variations of the components of energy balance, such as latent heat and sensible heat flux were analyzed. With the assist of meteorological variables such as precipitation, air temperature, wind speed and direction as well as physical- chemical water parameters (albedo, tide level, turbidity, water temperature and amount of total organic and inorganic carbon) was studied the role of these variables in the energy balance in the Caxiuanã bay. A peculiarity presented by Caxiuanã bay was the water temperature always being higher than the air temperature values, demonstrating that the bay can hold large amounts of heat during the day and not lose most of this heat to the atmosphere during the night. The total organic carbon present in the waters of the bay decreased concentration throughout the study period. The latent heat flux (LE) was shown to be the dominant component of the energy balance, presenting an average value of 200 W.m-2 during most of the study period, and the sensible heat flux (H) showed a peak in May with about 50 W.m-2. The negative values of H during the nighttime show that the bay is losing heat to the environment, ie, the bay is acting as a heat source for local atmosphere, including the forest.
Acesso aberto (Open Access)
Educação ambiental e estratégias empresariais na área portuária: um estudo da Companhia Docas do Pará (CDP)
(Universidade Federal do Pará, 2012-07-02) RODRIGUES, Jondison Cardoso; CASTRO, Edna Maria Ramos de; http://lattes.cnpq.br/4702941668727146
Since ECO-92 there was a substantial increase in stock for Environmental Education (EE) in Brazil and word, linked to various segments of society, social movements, neighborhood, associations, NGOs, schools, universities, research institutions and companies. EE‟s shares gained visibility in the business sector, particularly in the port area, the object of interest of this work. This thesis aims to analyze critically the logic of the introduction of EE port in the business sector an its impacts, from the analysis of the Companhia Docas do Pará (CDP). Studies of EE in the port sector not clarify the intentions of "economic order" to adopt environmental programs. We assume that EE is a field of knowledge of systemic character. Following the notion of field of Pierre Bourdieu, we show that the logic of the introduction of EE is to accumulate “symbolic capital” (credit/recognition) to achieve the legitimacy of the modus operandi business, showing his actions as sustainable. This allows you to promote a good image of the company, with the conquest of stamps and certificates. It was observed that there was building a “habutus eco-logical”, reproduced in labor relations by the professional qualification, in o other words, for the environmental management of the business, and increased ownership of the intellectual and cognitive dimension, trying to involve workers more intensely for the ordering, and hence, resulting performance gain business. We conclude that the rationale for entering the EE is the accumulation of “symbolic capital” to achieve the legitimate business of the modus operandi, showing how sustainable their actions, thereby promoting a good image of the company (increase in stock price, also its partners) and the decrease of investments in technology and make plans to mitigate environmental impacts. In summary, the analysis examines relevant elements of the restructuring of logistics Companhias Docas in Brazil, particularly in Pará.
Acesso aberto (Open Access)
Efeito do tamanho da área florestada, grau de isolamento e distância de estradas na estruturação de comunidades de aranhas em Alter do Chão, Santarém, Pará
(Universidade Federal do Pará, 2008-10-24) SILVA, Bruno José Ferreira da; BONALDO, Alexandre Bragio; http://lattes.cnpq.br/8721994758453503; ALBERNAZ, Ana Luisa Kerti Mangabeira; http://lattes.cnpq.br/1220240487835422
As forest destruction and fragmentation advance throughout the Brazilian Amazon, it has become important to determine how these processes affect the fauna in various vegetation types in order to predict impacts and the conservation value of habitat fragments for different animal taxa. Invertebrates are useful bio-indicators because of their adaptive and dispersal potential and intimate connections with the environment. The use of spiders to evaluate forest fragmentation is recent and only slightly employed, although the group is mega-diverse and biologically tied to environmental composition and structure. This study used spiders to evaluate the effects of forest fragment size, degree of isolation, and distance to roads in 15 forest islands in a savanna matrix and 6 areas of continuous forest, in Alter do Chão district, Santarém municipality, Pará state, Brazil. Capture of spiders involved 252 man-hours of effort with an entomological umbrella and manual nocturnal collections. Transects of 250 m were collected three times, and the summed results of each transect comprised a sample unit. In total, 7751 spiders were captured, including 5477 immature and 2274 adult specimens in 306 species belonging to 32 families. Spider community characteristics, analyzed by MDS (Multidimensional Scaling) with Bray-Curtis distance, showed separation between continuous forest and forest fragment habitats. For species with more than 10 individuals in the collections, an analysis was made of the response to the first dimension of ordination, and a direct ordination was made using characteristics of each collection area (distance from the forest island to continuous forest, area of forest fragment, and form index of the forest island). GLM analysis, used to evaluate the effects of environmental degradation, showed significant differences for number of trees in each forest fragment and for distance to roads: forest fragmentation was significant to spider communities only in terms of size of forest fragment (on axis 1 of the MDS). An ANOVA used to compare species richness showed greater richness in continuous forest, differing from the result of rarefaction curves that predict slightly higher species richness in forest islands. The hierarchical standard of the spider community was obtained with the Nestedness Temperature Calculator Program–Nestcalc.
Acesso aberto (Open Access)
Efeitos do processamento artesanal de raízes de mandioca (Manihot esculenta Crantz) e plantas de malva (Urena lobata L.) sobre a hidrobiogeoquímica de microbacias do Nordeste do Pará
(Universidade Federal do Pará, 2011) PIRES, Camila da Silva; FIGUEIREDO, Ricardo de Oliveira; http://lattes.cnpq.br/2388049759708934
Cassava and caesar weed are among the mainly products of the familiar agriculture in the Northeast of the Pará State. To treat these products the small farmers used to sink amounts of cassava and caesar weed in small streams (regionally named as "igarapés"), to make peal softer and remove its toxic compounds, in the case of cassava, or to promote defibrating in the case of the caesar weed. The effects of these practices to the stream water quality are poor known. In this context, this study aimed to evaluate the potential impacts of these practices to the fluvial hydrobiogeochemistry in the "igarapés" of these region. We adopted the strategy of collect stream water samples before the washing point of these products, in the washing point, and ten meters after this point. For a clearer understanding of the feasible alterations of the water chemistry due to cassava and caesar weed washing it was conducted besides the field monitoring a controlled input and output discharge tank experiment. In both approaches it was measured in the dissolved material the following hydrobiogeochemical: pH, electric conductivity, dissolved oxygen, calcium, magnesium, potassium, sodium, chloride, sulfate, phosphate, nitrate, ammonium, as well as total nitrogen total and organic and inorganic carbon. Our results point out that these cassava and caesar weed washing processes contribute to alter the fluvial hydrobiogeochemistry of these small streams only locally. However, some of the observed local alterations remained along at least ten meters downstream the products washing points. In the tank experiments the alteration were observed clearer and a cluster analysis confirmed the hypotheses that these rude treatments of the studied agriculture products contributes to change the fluvial hydrogeochemistry of the monitored small streams. The study recommends some precautions regarding to the evaluated products treatments and also the adoption of some parameters measurements to monitor these impacts.
Acesso aberto (Open Access)
Emissão de dióxido de carbono e estoque de carbono em sistemas convencionais e alternativo de produção agropecuária no Nordeste paraense
(Universidade Federal do Pará, 2011-08-25) LEMOS, Elane Cristina Melo; VASCONCELOS, Steel Silva; http://lattes.cnpq.br/0719395243841543
Use of agricultural conservation practices such as slash-and-mulch, as an alternative to slash-and-burn, is less harmful to biogeochemical cycling and helps to mitigate climate change. The aim of this study was to estimate soil carbon emission and stocks in smallholder agricultural units in Northeast of Pará. The study was carried out in the municipality of Mãe do Rio. Average annual temperature in this area varied from 25 to 28 °C and rainfall typically is higher than 2500 mm; predominant soil is Yellow Dystrophic Oxisol with texture varying from medium to clayey. In this research, we selected three land use systems (Schizolobium amazonicum plantation, Manihot esculenta crop, and silvopastoral), which were compared with a reference area (regrowth forest); we established four 20 m x 20 m plots in each system. We measured monthly soil CO2 efflux as well as soil carbon stock and aboveground litter carbon stock. Analysis of variance was used to test the effects of land use systems and regrowth forest effects on carbon emission and stock; Tukey test at 5% was used to compare treatment means. The silvopastoral system showed the highest monthly soil CO2 emissions, which were observed during the rainy season; this system also had the largest annual emission. Soil carbon stock was significantly higher in the regrowth forest was 157 ± 31,10 Mg ha-1 (0-100 cm). Litter stock was higher for the non-woody fraction than the woody fraction for both land use and regrowth forest systems. The largest stock of carbon in non-woody litter (overall mean = 4.31 ± 3,0 Mg ha-1) was observed in January 2010. Our results suggest that the land use systems that do not use fire in land preparation, such as the slash-andmulch system, helped to maintain carbon biogeochemical cycling.
Acesso aberto (Open Access)
Estimativas de biomassa e carbono em áreas de vegetação secundária no território paraense
(Universidade Federal do Pará, 2018-06-29) OLIVEIRA JUNIOR, Luis Augusto Lima; KELLER, Michael Maier; http://lattes.cnpq.br/1869582564376606; ADAMI, Marcos; http://lattes.cnpq.br/7484071887086439; https://orcid.org/0000-0003-4247-4477
Land use dynamics is a very intense process in the Amazon landscape because forest areas are constantly targets of deforestation, often illegal, which compromises the environmental balance of this ecosystem. In this context, a widespread element in the region's landscape is secondary vegetation (SV). The SV appears after a disturbance and can evolve and reach the characteristics close to a primary forest. This work aims to generate above-ground biomass and carbon estimates for the SV areas in the State of Pará for 2014. The methodology uses the variable GSDY (Growing-Season Degree-Years), calculated by SV age (TerraClass), temperature, and precipitation. The variable GSDY is part of a model proposed by Johnson et al. (2000) and Zarin et al. (2001), which generates above-ground biomass and carbon estimates. VS was classified into five classes according to its age. More than 6.9 million hectares of VS were mapped in the State of Para, representing more than two billion tons (t) of biomass (one million t of carbon) contained in VS. More than 2.8 million hectares of VS were vulnerable in 2014 because of SEMAS – PA Normative Instruction that enables cleaning these areas five years old or less (except those protected by law), with no environmental authorization needed. The SV loss could represent a considerable carbon emission to the atmosphere and massive damage to this region's balance.
Acesso aberto (Open Access)
Estradas, alagados antrópicos, peixes e a fragmentação de redes fluviais em uma paisagem agrícola do Nordeste do Pará
(Universidade Federal do Pará, 2011-04-18) BREJÃO, Gabriel Lourenço; GERHARD, Pedro; http://lattes.cnpq.br/5621269098705408
Badly planned roads crossing streams can generate small impoundments in channel segments upstream these crossings, turning lotic environments into lentic ones. The aim of this work was to study the diversity and functional structure of fish communities in anthropic impoundments in northeastern Pará state. These impoundments are formed due to roads construction on the riverine network, with large or small impacts on the hydrological connectivity, subject that is largely ignored for Neotropical lotic systems. Eighteen reaches were sampled in seven streams: six crossed by roads, and one not crossed by roads, used as a reference. Five streams are located in the cities of Igarapé-Açu and Marapanim in an agricultural landscape, and two in the city of São Francisco do Pará in a forest matrix. Five of six streams crossed by roads showed the formation of large impounded areas. In these locations three reaches were selected to sample fish: one upstream, one inside, and another one downstream the impoundment. In the not impounded stream only two reaches, upstream and downstream the road crossing the channel, were selected. The selected environments were sampled once between June and November, 2010, using visual census techniques (ad libitum and linear transect) in 200 m extension reaches. Seventy three species distributed in six orders, 26 families and 63 genera were registered. Characiformes (38.4%) and Siluriformes (31.5%) were the most representative orders in species number. Characidae, with 15 species (20.5%), e Cichlidae, with 10 (13.7%), were the most representative families in species number. These species were organized in 18 functional trophic groups (FTG) formed according to the most frequency observed feeding tactics to and its observed spatial distribution during the diving sessions. The impoundments enforced modifications in the streams biotic (assemblage taxonomic and functional structure) and physical structure of the streams. These environments showed lower species richness, higher abundance and lower FTG diversity in relation to the upstream and downstream reaches. The impoundments showed larger width, depth and high temperature besides less average speed and dissolved oxygen when compared to the upstream and downstream reaches. The use of functional trophic groups approach allowed to understand how the riverine network fragmentation process interfere in the studied fish assemblage structure.
Acesso aberto (Open Access)
Eventos extremos da zona de convergência intertropical sobre o Atlântico durante o período chuvoso da Amazônia oriental
(Universidade Federal do Pará, 2008) FERREIRA, Douglas Batista da Silva; SOUZA, Everaldo Barreiros de; http://lattes.cnpq.br/6257794694839685
This work reports an observational analysis of the climatological characteristics (period of 1985-2007) associated with the ITCZ extreme events, observed over the equatorial Atlantic Ocean, establishing its influences on the pluviometric variability over eastern Amazon, during the months of February, March and April. These events were selected objectively through Empirical Orthogonal Functions analysis, and the ocean-atmosphere patterns associated with ITCZ events, as well as, its impacts on eastern Amazon rainfall, were investigated through monthly composites. The results showed some monthly differences in the dynamical pattern related to the 200 hPa atmospheric circulation and configuration of vertical tropospheric motion, associated with the equatorial Hadley cell. Basically, the dynamic structure of the ocean-atmosphere patterns observed in February, March and April, showed that the ITCZ is formed over the equatorial Atlantic Ocean in a region of confluence between northeasterly and southerly winds that is coincident with areas of abnormally hotter SST, upward vertical air motion associated with the Hadley cell, and divergent outflow at high levels. The impacts of such events in the precipitation variability over the eastern Amazon, showed that the states affected by ITCZ are mainly Amapá, Pará and Maranhão. Additionally, it were reported some socio-environmental impacts (floods, falling trees, proliferation of diseases, among others) that occurred in the metropolitan area of Belém, associated with the occurrence of extreme weather events ITCZ selected in this work, associated to the presence of ITCZ over the region.
Acesso aberto (Open Access)
Fluxos de dióxido de carbono e metano de um lixão na Amazônia
(Universidade Federal do Pará, 2018-08-03) PINHEIRO, Layse Teixeira; CATTANIO, José Henrique; http://lattes.cnpq.br/1518769773387350
This work had as aim the quantification of greenhouse gases, carbon dioxide and methane from the uncontrolled Aurá landfill, known as the "Aurá Lode", in addition to collecting information from the place after its partial closure in 2015 .The research had a qualitative analysis of environmental aspects of the site and an experimental part, with the development of flow chambers, to capture the gases through the covering of cells other than the landfill. The measurements were performed in two ways, the first with 24 chambers distributed in three distinct points of two cells with relatively different ages and 90 chambers, distributed in grid, in a closed cell. These measurements occurred in a less rainy period and had their points located through geographic coordinates. A portable gas analyzer was used to simultaneously obtain the gas concentration in ppm. The flow calculations involved the selection of the intervals of each chamber, determination of the regression line of the gas concentrations by time, barometric equation and insertion of the data obtained in the main flow equation. The values of methane emissions in the cells titled A, B and C were 191,226 g m² d-¹, 397.7 g m² d-¹ and 36.30 g m² d-¹, respectively. The carbon dioxide fluxes reached 10,554.1 g m² d-¹, 11,786.65 g m² d-¹ and 7,529.77 g m² d-¹.
Acesso aberto (Open Access)
Políticas públicas para uma indústria madeireira (MAIS) sustentável no estado do Pará
(Universidade Federal do Pará, 2012-04-24) ROSÁRIO, Liliane Ferreira do; BRIENZA JÚNIOR, Silvio; http://lattes.cnpq.br/1750852376922258; RIVERO, Sérgio Luiz de Medeiros; http://lattes.cnpq.br/6692406360344209
The Amazon state of Para and one of the states with the highest development of the forestry sector and also largely responsible for deforestation. Followed legal instruments were created in order to regulate the use of forest resources. Progress has been made in creating policies for this purpose the results of the practical application of these instruments are still below expectations. With decentralization the states now have greater responsibility for forest management, but questionable, and the ability of state agencies to manage their resources. Among the rules of command and control the use of forest resources the Institute of Sustainable Forestry emerges almost as a scientific technician in the middle as an instrument capable of bringing the timber to the path of sustainability. Several studies corroborate this statement; however the level of adherence to this instrument is of concern. What is proposed in this study and identify what really brings discredit on industry regulations and how those statutes can be successfully executed and thereby be validated by the actors involved in the timber sector. To achieve these goals at first semi-structured interviews were made with the aid of questionnaires with business sector timber into two poles, one located in an old border (Paragominas) and the other in a new frontier (District Castle of Dreams). In the second phase interviews were conducted with the aid of structured questionnaire with public institutions and non governmental organizations operating in the sector and that have been mapped for this study as key players in creating and implementing sustainable policies for the sector. The field survey assessed the current situation of the forestry sector in relation to the following policies: forest management, forest certification, forest and Municipalities Grant Green. The results indicate that most entrepreneurs in the industry know all the part that comes to forest management, it was found also that the extent to which the law is linked both to the same as the understanding of financial matters (policies incentive). In this sense rejected the hypothesis of work. Entrepreneurs also reported the bureaucracy to obtain the release of a management plan. As for forest certification most entrepreneurs are interested in this mechanism; however they point out that the bureaucracy is very high and also reported economic issues. On forest concession identified that lack of information and clearer rules. About the Green Cities program was evaluated from the results achieved in Paragominas that it is efficient and effective because of its implementation is necessary to have a greater participation of society with the government. It is understood that the frequent changes in the law does not ensure the conservation of forest resources, and that the rigidity of the law does not lead to sustainable management of natural resources and is therefore necessary to create policies to foster economic and society participation in the formulation of norms and laws, especially those directly affected.
Acesso aberto (Open Access)
Trocas turbulentas noturnas de CO2 entre a floresta de Uatumã, Amazonas, e a atmosfera
(Universidade Federal do Pará, 2014-07-04) MAFRA, Ana Carolina Batista; SÁ, Leonardo Deane de Abreu; lattes.cnpq.br/0107976161469463; ARAÚJO, Alessandro Carioca de; lattes.cnpq.br/6188087583954899
We study the nocturnal boundary layer - NBL above an area of primary tropical forest northeast of the state of Amazonas, the Sustainable Development Reserve of Uatumã, distant 15 km of the Uatumã River, located about 380 km northeast of the city of Manaus, Amazonas. It is intended to determine some of the characteristics of the NBL, particularly nocturnal turbulence regimes by identifying the differences related to vertical exchanges of CO2, according to the methodology proposed by Sun et al. (2012). Fast response data will be used for the atmospheric scalar and vector quantities, as CO2 concentration and wind speed, respectively. The methodology allows characterization of NBL in three regimes of dynamic stability: 1) weak turbulence, mean low wind speed; 2) strong turbulence, with high wind speed, and 3) intermittent turbulence events with "top -down ". From this characterization, we have investigated some of the main statistical characteristics of each turbulent regime. As would be expected, the turbulent fluxes of CO2 increases with the characteristic scale of turbulent velocity, VTKE, associated with turbulent kinetic energy measured above the forest canopy. The CO2 exchange increases considerably with the regime 2,with higher values of the mean wind speed, | V |, and with the occurrence of strong mixing in the atmospheric boundary layer, ABL, not predominantly generated by surface forcings .

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