Navegando por Autor "FERREIRA, Douglas Batista da Silva"

Agora exibindo 1 - 5 de 5

Acesso aberto (Open Access)
Climatologia da estrutura vertical da atmosfera em novembro para Belém-PA
(2010-06) ANANIAS, Daniela dos Santos; SOUZA, Everaldo Barreiros de; SOUZA, Paulo Fernando de Souza; SOUSA, Adriano Marlisom Leão de; VITORINO, Maria Isabel; TEIXEIRA, Gleyciano Mendes; FERREIRA, Douglas Batista da Silva
The present work reports a diagnostic study on the vertical structure of air temperature, dew point temperature and relative humidity over the region of Belém-PA (eastern Amazon), based on monthly dataset for a period of 26 years (1982 to 2007). The focus is on the transition period from dry to wet season in the eastern Amazon, i.e., the month of November. Two contrasting composites in relation to the rainfall regime were considered: the wet and the dry year's composites, which were established objectively by the percentiles method. The results showed that the main difference observed in the temperature and humidity profiles, comparing dry and wet years, occurs in the atmospheric layer between the middle and upper levels of the troposphere (between the patterns level from 700 hPa to 400 hPa). In this layer, the difference between air temperatures and dew point is significantly higher and the contrast of moisture associated with convection also shows the highest values. In general, the compositions showed that the temperature profiles anomalously warmer (cold) and the moisture profiles anomalously wetter (dry) are associate to the years of rainfall above (below) of normal in the region of Belém-PA.
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)
Impactos das mudanças climáticas na ecoclimatologia de Aleurocanthus Woglumi Ashby, 1903 (Hemiptera: Aleyrodidae) no estado do Pará
(2014-03) MORAES, Bergson Cavalcanti de; SOUZA, Everaldo Barreiros de; RIBEIRO, João Batista Miranda; FERREIRA, Douglas Batista da Silva; MAIA, Wilson José de Mello e Silva
Human activities that alter the greenhouse gases concentrations will have a direct influence on plant health issues. In order to minimize both the production loss and the quality, and to guide the choice of adaptation strategies and management, further studies to investigate the impacts of climate change on agriculture - in the spatial and temporal scales - and their pathogens are needed. The main goal of this work was to explore the global climate impact on the ecoclimatology of the citrus blackfly (Aleurocanthus woglumi Ashby) in State of Pará. To do so, the thermal requirements of Aleurocanthus woglumi Ashby developed in laboratory and on the ecoclimatological zoning based on the annual insect population was first analyzed using air temperature data series from 15 meteorological stations. Then, the populational increase of the studied insect through the projections of global climate model CCSM 3.0, between years 2030 and 2090, was simulated and analyzed. The results of simulations suggest that the number of generations of the insect will increase 50% in Pará state.
Acesso aberto (Open Access)
Precipitação sazonal sobre a Amazônia oriental no período chuvoso: observações e simulações regionais com o RegCM3
(2009-06) SOUZA, Everaldo Barreiros de; LOPES, Marcio Nirlando Gomes; ROCHA, Edson José Paulino da; SOUZA, José Ricardo Santos de; CUNHA, Alan Cavalcanti da; SILVA, Renato Ramos da; FERREIRA, Douglas Batista da Silva; SANTOS, Daniel Meninéa; CARMO, Alexandre Melo Casseb do; SOUSA, José Raimundo Abreu de; GUIMARÃES, Paulo Lima; MOTA, Maria Aurora Santos da; MAKINO, Midori; SENNA, Renato Cruz; SOUSA, Adriano Marlisom Leão de; MOTA, Galdino Viana; KUHN, Paulo Afonso Fischer; SOUZA, Paulo Fernando de Souza; VITORINO, Maria Isabel
This paper presents a contribution on the climate modelling studies with emphasis on seasonal rainfall variability in eastern Amazonia, during the austral summer and autumn seasons (DJF and MAM). Based on RegCM3 regional climate simulations for a 26 years period (1982/83 to 2007/08) using high resolution domain scale (30 km) and two different convection schemes (Grell and MIT), it was investigated the model performance to simulate the regional pluviometric distribution in eastern Amazon, with reference to a new observational data base containing regional aspects extracted from a dense rain gauge station network. The quantitative analysis showed that RegCM3 presents systematic errors, especially those related to the dry bias in the Amapá and north/northeast of Pará using both schemes Grell and MIT, which indicate that the model does not reproduce ITCZ characteristics over equatorial Atlantic. The simulations using MIT also indicated wet bias in the southwest/south/southeast of Pará and north of Tocantins. Moreover, through composites technique, it was also investigated RegCM3 response to reproduce the anomalous spatial rainfall patterns in association with ENSO episodes and interhemispheric SSTa gradient phases across the intertropical Atlantic. The results showed that the model represented realistically well the spatial pattern related to the rainfall anomalies above (below) than normal in most of eastern Amazonia, during the known favourable scenarios, i.e., La Niña and south Atlantic SSTa gradient (unfavourable, i.e., El Niño and north Atlantic SSTa gradient).
Acesso aberto (Open Access)
Vulnerabilidade socioambiental e análise de risco aos extremos de precipitação no estado do Pará.
(Universidade Federal do Pará, 2018-11-20) FERREIRA, Douglas Batista da Silva; SOUZA, Everaldo Barreiros de; http://lattes.cnpq.br/6257794694839685; https://orcid.org/0000-0001-6045-0984
In the context of scientific themes related to the global/regional climate change, the extreme climate events deserve special attention because they represent natural threats to society and ecosystems. In Brazil, such events are primarily associated with scarcity or excessive rainfall with direct impact on the various sectors of society, whose consequences tend to be more severe in cities with greater vulnerability. In the present work, we used an interdisciplinary approach about socio-environmental vulnerability (covering the dimensions of susceptibility, coping capacity and adaptive capacity), combined with the exposure factor of climatic extremes (represented by extreme events associated with deficits and excess precipitation), aiming at the end to establish an integrated diagnosis of socio-environmental/climatic risk in the state of Pará. The analysis scale is municipal and the objective methodology based on indicators of different natures was applied in the 143 municipalities along the state. The socio-environmental/climatic risk (RISC) was calculated according to the index of climatic extremes (EXTCLI) and the socio-environmental vulnerability index (VSA), all classified into three categories (low, medium and high). The results in terms of the municipal base were spatialized throughout the state and showed that the highest frequencies of EXTCLI are located in the northeast portion (mesoregions of Baixo Amazonas and Marajó). The political indicators related to the coping and adaptive capacity showed an unsatisfactory performance (low category), showing inefficiency in legislation, actions and measures to protect the most vulnerable population from a short- and long-term point of view. In the risk analysis along the state, nine municipalities with RISC high category were highlighted (the majority located over the island of Marajó), in which a high category in terms of exposure and vulnerability was evidenced. Considering the findings of the present study, the RISC analysis approach allowed an integrated diagnosis on a municipal scale that is appropriate to subsidize the medium/long-term planning of the adaptation and mitigation actions in the face of climate change, particularly in the state of Pará.