Navegando por Autor "Souza, Rita Valéria Andreoli de"

Agora exibindo 1 - 9 de 9

Analise da frequência e intensidade da precipitação nos aeroportos de Ponta Pelada E Eduardo Gomes na cidade de Manaus - AM
(Universidade do Estado do Amazonas, 2017-12-01) Rocha, Charlis Barroso da; Souza, Rita Valéria Andreoli de; Souza, Jaidete Monteiro de; Souza, Rodrigo Augusto Ferreira de
This study aimed to evaluate the frequency and intensity of precipitation for two regions of the city of Manaus - AM in the period 2009-2016. For this, precipitation data of two stations, the Eduardo Gomes Airport (AEG) and Ponta Pelada Airport (APP) locates in the south and northwest of the city of Manaus were used. The methodology consisted of evaluating seasonal and diurnal variability of rainfall in terms of intensity and frequency. Initially, the monthly rainfall accumulation of the two regions was calculated for each year separately, in order to compare with the climate of Manaus. Then, monthly and daytime frequency of precipitation and the seasonal distribution of the insensitive of the rain events were calculated. In general, the total monthly precipitation for the AEG and APP followed the seasonal precipitation of the city of Manaus. However, in some years, values below or above monthly climatology are observed, possibly associated to interannual variability of the El Niño-Southern Oscillation phenomenon. Concerning the classification by rain intensity, in the two regions the highest frequencies occur in the very low precipitation category (0.2 - 1.6 mm) during the January, February and March (JFM) trimester. Events considered extreme (> 18 mm) also occur more frequently in the JFM period, but with smaller numbers of occurrences. The frequency of monthly rainfall showed a higher occurrence of events in the rainy season of the Amazon Region (December to April), with higher values in April, while that in period from June to November (dry season) shows the lowest occurrences, with lower values in September. In relation to the daytime frequency, the highest frequency occurs from 10-15 local time and secondary peaks occur by dawn (00 local time), morning (06 local time) and night (18 local time) on most months.
Análise da relação entre as ocorrências de inundações e precipitação na cidade de Manaus para o ano de 2014
(Universidade do Estado do Amazonas, 2018-06-15) Miranda, Priscila Pereira de; Dehaini, Jamile; Souza, Rita Valéria Andreoli de; Souza, Rodrigo Augusto Ferreira de
This work presents a study on the relationship between rainfall and number of floods in the city of Manaus-AM. In order to explore this relationship, flood records of the Civil Defense of Manaus were used for the period from 2010 to 2014. The rainfall variability over the city was analyzed through rainfall records of rain gauges distributed in five of the six zones that comprise the urban zone of Manaus for the year 2014. Pearson's correlation was used to validate the results. In general, it can be said that the stations SBMN, MAUÁ, BETA and EST followed the seasonal precipitation of the city of Manaus. On the other hand, the ALFA and SBEG stations presented different behavior. ALFA with low rainfall rates from April to October, and also in December. SBEG presented monthly accumulations superior to the climatology from March to December, mainly emphasizing the behavior of the rains during the dry period (jul-ago-set). This distinct behavior among the zones must have been caused by differences in land use, proximity to forested areas and influence of river breeze. With respect to flood cases, when monthly totals are analyzed for each year, greater records are observed during the rainy season and during the months of occurrence of Rio Negro maximum levels. The year of 2014 presented high values in the months of March (associated with accumulated precipitation in all zones), May and June, where the last two coincides with the months of occurrences of Rio Negro maximum levels. In relation to other years, the year 2011 presented the highest number of cases for the rainiest months (February and April) that may be associated with the increase of precipitation over the region due to a strong La Niña event occurring in the years 2010-2011 . The neighborhoods that stood out as the most susceptible to flood events were those of Jorge Teixeira (ZL), Terra Nova (ZN), Educandos (ZS), Tarumã (ZO), Alvorada (ZCO) and Flores (ZCS). The zones where the stations of MAUÁ, BETA and EST are located showed a strong correlation between precipitation and floods, when considering the monthly totals. Nevertheless, through the test of significance, only the BETA (ZN) station showed a correlation with a relatively strong degree. On the other hand, the results related to the daily correlation did not present significant values, presenting great dispersion in all the areas considered.
Curumins do tempo: um projeto que visa à aproximação da sociedade com a Meteorologia
(Universidade do Estado do Amazonas, 2019-01-17) Oliveira, Maria Betânia Leal de; Fernandes Filho, Silas Farias; Barbosa, Rafael Gomes; Chaves, Daniela Correa; Souza, Rita Valéria Andreoli de; Souza, Rodrigo Augusto Ferreira de
The present paper is a report of activities developed during the execution of the Curumins do Tempo Project, submitted and approved in the Institutional Extension Program of the Amazonas State University (PROGEX/UEA, No. 38/2017- GR). It aims to promote the interaction between the university and society with regard to meteorology, in order to arouse interest in this subject. During the execution of the project students had the opportunity to understand how the air temperature, precipitation, wind speed, and other meteorological elements are measured in practice. We have presented different models of equipment that can be used for these measurements and their advances over the years, what physical units of measurement are used for each variable, and how these measures relate to weather and climate that are part of our daily routine, such as clouds, seasons, and thermal comfort. For so many models, posters, and practical activities were used in order to facilitate and make pleasant understanding of these topics related to meteorology, thus motivating these “Curumins do Tempo” to pass on the acquired knowledge.
Diferenças entre as evoluções temporais dos ENOS plurianuais e de único ano: Impactos na precipitação da América do Sul tropica
(Universidade do Estado do Amazonas, 2022-05-24) Anguelova, Mira Assenova; Souza, Rita Valéria Andreoli de; Souza, Jaidete Monteiro de; Souza, Rodrigo Augusto Ferreira de
The present work seeks to characterize and point out the differences in the patterns of evolution el Niño-Southern Oscillation (ENOS) events lasting a single year, defined as annual, and long-term, as multi-annual, through the analysis of the Temperature of Surface of the Sea, as well as verify the influence of such events on precipitation in the Tropical South America. To this, two contrasting events, in terms of the duration of event, both for the positive phase of ENOS (El Niño) and for the negative phase (La Niña), were selected for case studies. Separate analysis of each of the events suggested that ENOS events have different characteristics in relation to intensity and persistence of anomalies when comparatoring the first and second year of Events. In addition, changes in the atmospheric patterns of tropical teleconnections during the the first and second year of the events impact differently on the precipitation of America Tropical South.
Os diferentes tipos de El Niño e seus impactos na precipitação sobre a América do Sul.
(Universidade do Estado do Amazonas, 2022-03-28) Macêdo, Tabata Lauhanda Bastos de; Souza, Rita Valéria Andreoli de; Souza, Jaidete Monteiro de; Souza, Rodrigo Augusto Ferreira de
The present work seeks to characterize the differences between the patterns of Sea Surface Temperature (SST) anomaly patterns associated with the diversity of the positive phase (El Niño - EN) of the El Niño - Southern Oscillation (ENOS) phenomenon, as well as to assess its impacts on precipitation over South America. For this, the years of El Niño events were selected within the period 1950-2019, and classified according according to their intensity (Strong El Niño), location (El Niño Modoki and Canonical) and duration time (Successive El Niño). Then, the analyses of seasonal compositions and compositional differences for the anomalies of Sea Surface Temperature, precipitation, Potential Velocity and Current Function Current at 200 hPa, Omega at 500 hPa and vertically integrated moisture flux and its divergence. and its divergence. Compositions of Sea Surface Temperature anomalies reproduce the characteristics associated with the event selection method, and show that, relative to the average of all events, strong El Niño events exhibit an intensification of the east-west sea surface temperature gradient over the equatorial Pacific over the equatorial Pacific from its initial phase until its decay, the strong El Niño events show an Modoki El Niño events show a cooling over the eastern Pacific, while canonical El Niño events did not show distinct canonical El Niño events showed no distinct characteristics from the average behavior of the surface temperature anomalies over the tropical Pacific and the successive El Niño events show a cooling over the Successive El Niño events reveal a weakening of the El Niño along its evolution, evolution, except in the austral winter. The differences in the evolution patterns of El Niños influence seasonal precipitation over South America differently. For strong El Niños there is an intensification of positive anomalies in response to the event, while over the affected regions a decrease in rainfall, changes in the intensity or positioning of the anomaly centers are observed. centers of precipitation anomalies are observed. For El Niños Modoki larger variations occur in the tropical region with the weakening of the typical El Niño response, while for successive El Niño events a weakening of the typical negative/positive negative/positive anomalies in response to El Niño is observed. These changes in the patterns of precipitation anomaly patterns are associated with differences in the patterns of Sea surface temperature anomaly patterns related to the different types of El Niño, that affect the intensities of the Walker circulation and Rossby waves, which modulate the regional circulation
Padrões Decenais do Gradiente Inter-Pacífico-Atlântico e a Precipitação da América do Sul
(Universidade do Estado do Amazonas, 2018-12-03) Rego, Willy Hagi Teles; Souza, Rita Valéria Andreoli de; capistrano, Vinicius Buscioli; Dehaini, Jamile
The Pacific and Atlantic Tropical oceans are responsible for most of the climate variability in the tropical region. Even though independent, they can form together an interannual variabil ity mechanism called the Inter-Pacific-Atlantic gradient, which is also modulated in decadal scales by the positive and negative phases of the Atlantic Multidecadal Oscillation (+AMO and -AMO). The present work investigated the variations in the associated atmospheric and oceanic patterns during austral winter through both AMO phases and its impacts on South America’s (SA) Precipitation anomalies (APRP). Results show that this phenomenon is a dominant vari ability mode during austral winter, characterized by Sea Level Pressure anomalies (SLPA) and Sea Surface Temperature anomalies (ASST) gradient between both tropical oceans. Selection of extreme events shows an equal distribution of positive events (+PC1) for both phases while the negatives (-PC1) are more frequent during -AMO. +PC1 events during +AMO are charac terized by an west-east ASST gradient made by the anomalous cooling (warming) of Tropical Pacific (Atlantic), especially at Central Pacific (Tropical North Atlantic, responsible for posi tive (negative) APRP at SA’s Extreme-North (Central-West and South) region. +PC1 events in -OMA are equatorially confined and show similar impacts in SA’s rainfall. The ATSM gradi ent becomes east-west for -PC1 events due to Tropical Pacific (Atlantic) anomalous warming (cooling), even though they are equatorially confined only during +AMO periods. These events are related to positive (negative) APRP for the Center-West and South-Southeast (North) SA regions during both phases. Results show that different oceanic and atmospheric patterns com pose the Inter-Pacific-Atlantic sector’s variability, which impacts SA’s rainfall significantly and can be felt though the entire continent.
Relação das variáveis hidrometeorológicas com os casos de malária nos Municípios da Bacia do Rio Negro-AM
(Universidade do Estado do Amazonas, 2019-12-06) Figueiredo, Ranyelli Cunha de; Dehaini, Jamile; Souza, Rita Valéria Andreoli de; Souza, Rodrigo Augusto Ferreira de; Capistrano, Vinicius Buscioli
Malaria is a high-risk infectious disease that causes great concern and high costs to public health, especially in tropical and subtropical regions of the world. The Amazon region has a high endemic rate of malaria, in which its hydrometeorological characteristics are preponderant for longevity, vector density of the transmitter and the reproduction of the pathological agent of the disease. It becomes important, diagnose how the hydrometeorological conditions of each region are associated with the occurrences of malaria and understand how the variability of these conditions are associated, with the incidence of the disease. The objective of this work is to analyze the influence of the conditions hydrometeorological conditions and their variability in the incidence of malaria cases in the municipalities of Manaus, Barcelos and São Gabriel da Cachoeira, which are bathed by the Negro River, in the State of Amazonas. The results show that during the driest period in the region, the malaria cases are more prevalent, this relationship is observed by Pearson's correlation coefficient, where precipitation, relative air humidity and the height of the Rio Negro showed a moderate and negative correlation with the incidence of malaria, and temperature showed a positive and moderate correlation with the incidence of malaria. The analysis for the ENSO event shows that the variability caused in the hydrometeorological elements, can potentiate/attenuate the incidence of malaria.
Relação entre o modo meridional de TSM no Pacífico e o ENOS e seus efeitos sobre a precipitação na Amazônia
(Universidade do Estado do Amazonas, 2019-12-06) Moraes, Djanir Sales de; Souza, Rita Valéria Andreoli de; Dehaini, Jamile; Oliveira, Maria Bethania Leal de
In this study we aim to caracterize the Pacific Meridional Mode (PMM) of Sea Surface Temperature (SST) and its relationship with El Niño-Southern Oscillation (ENSO) and the rainfall in the Amazonic region during 1901 to 2010. The methodology of this study is based on the method of Combined and Extended Empirical Orthogonal Function (CEOF and EEOF respectively) to identify the spatial and temporal patterns of the PMM. Composite analyses and linear correlation tools are used to search for the relations between the PMM, ENSO and precipitation. The results show that the spatial pattern of PMM presents a variability of 8 years and is best defined in the months of June through August (JJA). Correlations between the timeseries associated with PMM and precipitation show a temporal dependency, with a change of pattern after the 1980s. The effects combined of ENSO and PMM on the precipitation over Tropical South America were also investigated. In this case, the results suggest that the ocurrence of positive or negative PMM patterns during the initial phase of ENSO events can act in the sense of configurating the positioning of the maximum anomaly centers associated with ENSO and as as consequence alter the pattern of precipitation over the Amazon. On the other hand, ENSO in its decaying phase doesn’t seem to interfere in the development of PMM and its relation with rainfall.
Relação entre o modo meridional de TSM no Pacífico e o ENOS e seus efeitos sobre a precipitação na Amazônia
(Universidade do Estado do Amazonas, 2019-12-06) Moraes, Djanir Sales de; Souza, Rita Valéria Andreoli de; Dehaini, Jamile; Oliveira, Maria Betânia Leal de
In this study we aim to caracterize the Pacific Meridional Mode (PMM) of Sea Surface Temperature (SST) and its relationship with El Niño-Southern Oscillation (ENSO) and the rainfall in the Amazonic region during 1901 to 2010. The methodology of this study is based on the method of Combined and Extended Empirical Orthogonal Function (CEOF and EEOF respectively) to identify the spatial and temporal patterns of the PMM. Composite analyses and linear correlation tools are used to search for the relations between the PMM, ENSO and precipitation. The results show that the spatial pattern of PMM presents a variability of 8 years and is best defined in the months of June through August (JJA). Correlations between the timeseries associated with PMM and precipitation show a temporal dependency, with a change of pattern after the 1980s. The effects combined of ENSO and PMM on the precipitation over Tropical South America were also investigated. In this case, the results suggest that the ocurrence of positive or negative PMM patterns during the initial phase of ENSO events can act in the sense of configurating the positioning of the maximum anomaly centers associated with ENSO and as as consequence alter the pattern of precipitation over the Amazon. On the other hand, ENSO in its decaying phase doesn’t seem to interfere in the development of PMM and its relation with rainfall.