Características da camada limite atmosférica marinha em cruzeiros oceanográficos realizados no Atlântico Sul e Equatorial
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Manancial - Repositório Digital da UFSM |
Texto Completo: | http://repositorio.ufsm.br/handle/1/19594 |
Resumo: | A study of sensible (H) and latent (Le) heat fluxes between the ocean and the atmosphere, using measurements performed by micrometeorological towers aboard Brazilian research vessels in the South and Equatorial Atlantic Ocean, is presented. Data obtained from four cruises, performed in December 2012, July and October 2015 and between November 2017 and January 2018, were studied. The heat fluxes obtained from the Eddy Covariance (CV) methodology and the bulk parameterization were analyzed and compared. For the cruises performed in December 2012, July 2015 and October 2015, the largest differences in fluxes were observed associated with the passage of low pressure atmospheric systems, large differences between sea temperature and air temperature and strong winds. The greatest similarities between the flows were observed under the influence of the South Atlantic Subtropical High and light winds. For the cruise performed between November 2017 and January 2018, the largest discrepancy between the two methods was observed, compared to other cruises, especially for Le. It was also analyzed the micrometeorological behavior of the flow in each of the cruises, under different stability conditions. Anisotropic turbulence was identified in October 2015. This study presents for the first time Hockey Stick obtained from data collected on moving ships. In addition it was possible to observe the presence of submeso scale movements, with the highest number from November 2017 to January 2018. These movements can influence vertical flows, generating unpredictable and random contributions. The results demonstrate the importance of local ocean surface conditions and the large-scale synoptic conditions of the atmosphere, which influence the evolution of the marine atmospheric boundary layer and the heat transfer between the ocean and the atmosphere. |
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Características da camada limite atmosférica marinha em cruzeiros oceanográficos realizados no Atlântico Sul e EquatorialMarine atmospheric boundary layer characteristics on oceanographic cruises on the South and Equatorial AtlanticFluxos de calorHockey StickCamada limite estávelHeat fluxesHockey StickStable boundary layerCNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::METEOROLOGIAA study of sensible (H) and latent (Le) heat fluxes between the ocean and the atmosphere, using measurements performed by micrometeorological towers aboard Brazilian research vessels in the South and Equatorial Atlantic Ocean, is presented. Data obtained from four cruises, performed in December 2012, July and October 2015 and between November 2017 and January 2018, were studied. The heat fluxes obtained from the Eddy Covariance (CV) methodology and the bulk parameterization were analyzed and compared. For the cruises performed in December 2012, July 2015 and October 2015, the largest differences in fluxes were observed associated with the passage of low pressure atmospheric systems, large differences between sea temperature and air temperature and strong winds. The greatest similarities between the flows were observed under the influence of the South Atlantic Subtropical High and light winds. For the cruise performed between November 2017 and January 2018, the largest discrepancy between the two methods was observed, compared to other cruises, especially for Le. It was also analyzed the micrometeorological behavior of the flow in each of the cruises, under different stability conditions. Anisotropic turbulence was identified in October 2015. This study presents for the first time Hockey Stick obtained from data collected on moving ships. In addition it was possible to observe the presence of submeso scale movements, with the highest number from November 2017 to January 2018. These movements can influence vertical flows, generating unpredictable and random contributions. The results demonstrate the importance of local ocean surface conditions and the large-scale synoptic conditions of the atmosphere, which influence the evolution of the marine atmospheric boundary layer and the heat transfer between the ocean and the atmosphere.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESEste trabalho apresenta um estudo dos fluxos de calor sensível (H) e latente (Le) entre o oceano e a atmosfera, utilizando medidas realizadas por torres micrometeorológicas a bordo de navios brasileiros de pesquisa no oceano Atlântico Sul e Equatorial. Os dados obtidos em quatro cruzeiros, realizados nos meses de dezembro de 2012, julho e outubro de 2015 e entre novembro de 2017 e janeiro de 2018, foram estudados. Os fluxos de calor obtidos a partir da metodologia da Covariância de Vórtices (CV) e da parametrização de bulk (bulk), foram analisados e comparados. Para os cruzeiros realizados em dezembro de 2012, julho e outubro de 2015, foram observados as maiores diferenças nos fluxos, associadas à passagem de sistemas atmosféricos de baixa pressão, grandes diferenças entre a temperatura do mar e a temperatura do ar e vento intensos. As menores diferenças entre os fluxos foram observadas sob a atuação da Alta Subtropical do Atlântico Sul e regime de ventos fracos. Já para o cruzeiro realizado entre novembro de 2017 e janeiro de 2018 foram observadas as maiores discrepâncias entre os dois métodos quando comparado com os demais cruzeiros, principalmente para Le. Foi analisado também o comportamento micrometeorológico do escoamento em cada um dos cruzeiros, sob diferentes condições de estabilidade. Foi identificada a existência de uma turbulência anisotrópica em outubro de 2015. Este estudo apresenta pela primeira vez Hockey Stick obtidos através dos dados coletados em navios em movimento. Além disso foi possível observar a presença de movimentos da escala submeso, com maior numero de ocorrência no período de novembro de 2017 à janeiro de 2018. Estes movimentos podem influenciar os fluxos verticais, gerando contribuições imprevisíveis e aleatórias. Os resultados demonstram a importância das condições locais da superfície do oceano e das condições sinóticas de grande escala da atmosfera que influenciam a evolução da camada limite atmosférica marinha e a transferência de calor entre o oceano e a atmosfera.Universidade Federal de Santa MariaBrasilMeteorologiaUFSMPrograma de Pós-Graduação em MeteorologiaCentro de Ciências Naturais e ExatasSouza, Ronald Buss dehttp://lattes.cnpq.br/0537824080913130Acevedo, Otavio Costahttp://lattes.cnpq.br/8696858608013659Martins, Luís Gustavo Nogueirahttp://lattes.cnpq.br/1434914304135873Fisch, Gilbertohttp://lattes.cnpq.br/0331228247415761Santos, Daniel Michelon doshttp://lattes.cnpq.br/5471637961840087Rossato, Fernando2020-02-17T12:29:46Z2020-02-17T12:29:46Z2019-09-11info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisapplication/pdfhttp://repositorio.ufsm.br/handle/1/19594porAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessreponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM2020-02-18T06:03:11Zoai:repositorio.ufsm.br:1/19594Biblioteca Digital de Teses e Dissertaçõeshttps://repositorio.ufsm.br/ONGhttps://repositorio.ufsm.br/oai/requestatendimento.sib@ufsm.br||tedebc@gmail.comopendoar:2020-02-18T06:03:11Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false |
dc.title.none.fl_str_mv |
Características da camada limite atmosférica marinha em cruzeiros oceanográficos realizados no Atlântico Sul e Equatorial Marine atmospheric boundary layer characteristics on oceanographic cruises on the South and Equatorial Atlantic |
title |
Características da camada limite atmosférica marinha em cruzeiros oceanográficos realizados no Atlântico Sul e Equatorial |
spellingShingle |
Características da camada limite atmosférica marinha em cruzeiros oceanográficos realizados no Atlântico Sul e Equatorial Rossato, Fernando Fluxos de calor Hockey Stick Camada limite estável Heat fluxes Hockey Stick Stable boundary layer CNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::METEOROLOGIA |
title_short |
Características da camada limite atmosférica marinha em cruzeiros oceanográficos realizados no Atlântico Sul e Equatorial |
title_full |
Características da camada limite atmosférica marinha em cruzeiros oceanográficos realizados no Atlântico Sul e Equatorial |
title_fullStr |
Características da camada limite atmosférica marinha em cruzeiros oceanográficos realizados no Atlântico Sul e Equatorial |
title_full_unstemmed |
Características da camada limite atmosférica marinha em cruzeiros oceanográficos realizados no Atlântico Sul e Equatorial |
title_sort |
Características da camada limite atmosférica marinha em cruzeiros oceanográficos realizados no Atlântico Sul e Equatorial |
author |
Rossato, Fernando |
author_facet |
Rossato, Fernando |
author_role |
author |
dc.contributor.none.fl_str_mv |
Souza, Ronald Buss de http://lattes.cnpq.br/0537824080913130 Acevedo, Otavio Costa http://lattes.cnpq.br/8696858608013659 Martins, Luís Gustavo Nogueira http://lattes.cnpq.br/1434914304135873 Fisch, Gilberto http://lattes.cnpq.br/0331228247415761 Santos, Daniel Michelon dos http://lattes.cnpq.br/5471637961840087 |
dc.contributor.author.fl_str_mv |
Rossato, Fernando |
dc.subject.por.fl_str_mv |
Fluxos de calor Hockey Stick Camada limite estável Heat fluxes Hockey Stick Stable boundary layer CNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::METEOROLOGIA |
topic |
Fluxos de calor Hockey Stick Camada limite estável Heat fluxes Hockey Stick Stable boundary layer CNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::METEOROLOGIA |
description |
A study of sensible (H) and latent (Le) heat fluxes between the ocean and the atmosphere, using measurements performed by micrometeorological towers aboard Brazilian research vessels in the South and Equatorial Atlantic Ocean, is presented. Data obtained from four cruises, performed in December 2012, July and October 2015 and between November 2017 and January 2018, were studied. The heat fluxes obtained from the Eddy Covariance (CV) methodology and the bulk parameterization were analyzed and compared. For the cruises performed in December 2012, July 2015 and October 2015, the largest differences in fluxes were observed associated with the passage of low pressure atmospheric systems, large differences between sea temperature and air temperature and strong winds. The greatest similarities between the flows were observed under the influence of the South Atlantic Subtropical High and light winds. For the cruise performed between November 2017 and January 2018, the largest discrepancy between the two methods was observed, compared to other cruises, especially for Le. It was also analyzed the micrometeorological behavior of the flow in each of the cruises, under different stability conditions. Anisotropic turbulence was identified in October 2015. This study presents for the first time Hockey Stick obtained from data collected on moving ships. In addition it was possible to observe the presence of submeso scale movements, with the highest number from November 2017 to January 2018. These movements can influence vertical flows, generating unpredictable and random contributions. The results demonstrate the importance of local ocean surface conditions and the large-scale synoptic conditions of the atmosphere, which influence the evolution of the marine atmospheric boundary layer and the heat transfer between the ocean and the atmosphere. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-09-11 2020-02-17T12:29:46Z 2020-02-17T12:29:46Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
format |
doctoralThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://repositorio.ufsm.br/handle/1/19594 |
url |
http://repositorio.ufsm.br/handle/1/19594 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Brasil Meteorologia UFSM Programa de Pós-Graduação em Meteorologia Centro de Ciências Naturais e Exatas |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Brasil Meteorologia UFSM Programa de Pós-Graduação em Meteorologia Centro de Ciências Naturais e Exatas |
dc.source.none.fl_str_mv |
reponame:Manancial - Repositório Digital da UFSM instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Manancial - Repositório Digital da UFSM |
collection |
Manancial - Repositório Digital da UFSM |
repository.name.fl_str_mv |
Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM) |
repository.mail.fl_str_mv |
atendimento.sib@ufsm.br||tedebc@gmail.com |
_version_ |
1805922066840420352 |