Fechar
Metadados

@PhDThesis{Carneiro:2018:ErCaLi,
               author = "Carneiro, Rayonil Gomes",
                title = "Eros{\~a}o da camada limite noturna e suas 
                         implica{\c{c}}{\~o}es no crescimento da camada limite convectiva 
                         na regi{\~a}o central da Amaz{\^o}nia (experimento GoAmazon 
                         2014/15)",
               school = "Instituto Nacional de Pesquisas Espaciais (INPE)",
                 year = "2018",
              address = "S{\~a}o Jos{\'e} dos Campos",
                month = "2018-03-16",
             keywords = "modelo LES. fluxos de superf{\'{\i}}cie. energia cin{\'e}tica 
                         turbulenta, LES model. surface fluxes. turbulent kinetic energy.",
             abstract = "A transi{\c{c}}{\~a}o entre as fases est{\'a}vel (camada limite 
                         noturna - CLN) e inst{\'a}vel (camada limite convectiva - CLC) da 
                         camada limite planet{\'a}ria (CLP) possui grande import{\^a}ncia 
                         para estudos de desenvolvimento da convec{\c{c}}{\~a}o diurna, 
                         pois esta fase (denominada eros{\~a}o da CLN) influ{\^e}ncia no 
                         desenvolvimento e crescimento da CLC. Assim, o presente estudo 
                         visou entender a eros{\~a}o da CLN, os fatores que intensificam 
                         sua ocorr{\^e}ncia e foi testada a hip{\'o}tese da eros{\~a}o 
                         da CLN influ{\^e}nciar na forma{\c{c}}{\~a}o e desenvolvimento 
                         da CLC, atrav{\'e}s da combina{\c{c}}{\~a}o de duas abordagens, 
                         com an{\'a}lises por medidas observacionais (radiossonda e 
                         sensores remotos) e por modelagem num{\'e}rica utilizando o 
                         modelo PALM (PArallelized Les Model), para a regi{\~a}o central 
                         da Amaz{\^o}nia. Esta pesquisa ser{\'a} associada {\`a}s 
                         condi{\c{c}}{\~o}es de superf{\'{\i}}cie da regi{\~a}o e as 
                         esta{\c{c}}{\~o}es chuvosas e secas do ano de 2014 (considerado 
                         um ano t{\'{\i}}pico) e do ano de 2015, quando ocorreu um forte 
                         evento El-Niņo. O estudo foi baseado nos dados provenientes do 
                         Projeto GoAmazon 2014/5 (http://campaign.arm.gov/goamazon2014/). 
                         Os resultados mostraram que a eros{\~a}o da CLN {\'e} fortemente 
                         influenciada pelas caracter{\'{\i}}sticas da CLN ao longo da 
                         noite e o fluxo de calor sens{\'{\i}}vel {\`a} 
                         superf{\'{\i}}cie nas primeiras horas da manh{\~a}. Durante as 
                         esta{\c{c}}{\~o}es chuvosa (anos 2014 e 2015) a eros{\~a}o 
                         completa da CLN ocorreu em torno de 3 horas ap{\'o}s o nascer do 
                         sol. Nas esta{\c{c}}{\~o}es secas, quando foi observada uma CLN 
                         fortemente est{\'a}vel, os fluxos turbulentos mais intensos 
                         permitiram que a CLN fosse erodida em apenas 2 horas. A 
                         eros{\~a}o da CLN influenciou, de forma direta, o desenvolvimento 
                         da CLC posterior, sendo que a eros{\~a}o mais r{\'a}pida 
                         permitiu que a CLC tivesse um maior desenvolvimento vertical. O 
                         modelo PALM mostrou efici{\^e}ncia para simular a fase de 
                         transi{\c{c}}{\~a}o da CLN para CLC: durante ambas 
                         esta{\c{c}}{\~o}es chuvosas a simula{\c{c}}{\~a}o apresentou 
                         uma pequena superestimava da altura ( 40 m) na fase final da CLN 
                         que antecedeu a eros{\~a}o, e uma subestimativa ( 20 m), no 
                         in{\'{\i}}cio da eros{\~a}o nas esta{\c{c}}{\~o}es secas. A 
                         energia cin{\'e}tica turbulenta (ECT) apresentou 
                         caracter{\'{\i}}sticas semelhantes em todos os casos simulados 
                         distinguindo-se na intensidade, produzindo um maior transporte 
                         durante no hor{\'a}rio em que a CLN j{\'a} havia sido 
                         destru{\'{\i}}da e uma maior produ{\c{c}}{\~a}o de energia nos 
                         per{\'{\i}}odos secos. ABSTRACT: The phase of transition between 
                         the stable phase (Nocturnal Boundary Layer - NBL) and unstable 
                         (Convective Boundary Layer - CBL) layer of the planetary boundary 
                         layer (CLP) is of great importance for studies of the development 
                         of daytime convection, since this phase (called CLN erosion) 
                         influences in CBL development and increase. Thus, the present 
                         study aims to understand the Nocturnal Boundary Layer Erosion, the 
                         factors that intensify its occurrence and was tested the 
                         hypothesis of NBL erosion influence in the formation and 
                         development of CBL, through of the combination boarding with 
                         analyzes by observational measurement (radiosonde and remote 
                         sensors) and numerical modeling through of the PALM model 
                         (PArallelized Les Model), for the central Amazon region. This 
                         research will be associated a to the surface conditions of the 
                         region and wet and dry seasons of the year 2014 (considered 
                         tipical) and of the year 2015, when occurred the strong El-NiŅo 
                         event. The study was based on proceeding data from GoAmazon 
                         Project 2014/2015 (http://campaign.arm.gov/goamazon2014/). The 
                         result indicated that the NBL erosion is strongly influenced by 
                         NBL characteristics all night long and the sensible heat flux in 
                         the first hours of the morning. While the wet seasons (2014 and 
                         2015) the complete NBL erosion was approximate 3 hours after 
                         sunrise. In the dry seasons, when a strongly stable NBL was 
                         observed, the most intensive flux permitted that NBL erosion were 
                         2 hours after sunrise. The NBL erosion influenced directly the 
                         form the subsequent CBL development, being that a faster erosion 
                         allowed the CBL to have a greater vertical development. The PALM 
                         model showed efficiency for simulating the transition phase of the 
                         NBL to:during the wet seasons the simulation showed a small 
                         overestimate ( 40 m) in the final NBL phase that anteceded the 
                         erosion, and one small underestimate ( 20 m) at the begging of the 
                         erosion in the dry seasons. The Turbulent Kinect Energy (TKE) 
                         showed similar characteristics in all simulation, distinguishing 
                         the intensity, produce more transporting during the hours that the 
                         NBL had already been destructed, with more energy production in 
                         the dry seasons.",
            committee = "Reyes Fernandez, Julio Pablo (presidente) and Fisch, Gilberto 
                         Fernando (orientador) and Manzi, Antonio Ocimar and Lyra, Roberto 
                         Fernando da Fonseca and Silva, Julio Tot{\'a} da",
         englishtitle = "Nocturnal boundary layer erosion and its implications on the 
                         growth of the convective boundary layer in the Amazon region 
                         (GoAmazon 2014/5 experiment)",
             language = "pt",
                pages = "185",
                  ibi = "8JMKD3MGP3W34P/3QD57NE",
                  url = "http://urlib.net/rep/8JMKD3MGP3W34P/3QD57NE",
           targetfile = "publicacao.pdf",
        urlaccessdate = "25 nov. 2020"
}


Fechar