Fluxos de calor e dióxido de carbono entre o oceano e a atmosfera na região costeira e oceânica ao Sul do Brasil
Ano de defesa: | 2014 |
---|---|
Autor(a) principal: | |
Orientador(a): | |
Banca de defesa: | , |
Tipo de documento: | Dissertação |
Tipo de acesso: | Acesso aberto |
Idioma: | por |
Instituição de defesa: |
Universidade Federal de Santa Maria
|
Programa de Pós-Graduação: |
Programa de Pós-Graduação em Meteorologia
|
Departamento: |
Meteorologia
|
País: |
BR
|
Palavras-chave em Português: | |
Palavras-chave em Inglês: | |
Área do conhecimento CNPq: | |
Link de acesso: | http://repositorio.ufsm.br/handle/1/10280 |
Resumo: | The Southwest Atlantic Ocean is characterized, in winter, by the presence of an oceanographic front between the Brazil Current (BC) and the Brazilian Coastal Current (BCC). The BC/BCC oceanographic front generates intense thermal horizontal gradients between cold waters of the southern Brazilian continental shelf, dominated by the BCC, and the offshore warm waters, dominated by the BC. This study analyses, for the first time in the known literature, the coupling mechanisms between the ocean and the atmosphere from observational data taken simultaneously during an oceanographic research cruise in the southern Brazilian coast during 11-21 June 2014. In this field experiment, atmospheric radiosondes were launched and hydrographic stations were taken to measure the ocean s temperature and salinity. The study area was chosen based on the local thermal gradients presented by the BC/BCC front. Five oceanographic transects were performed perpendicular to the coast starting at the locality of Paranaguá (Paraná State) and ending in Chuí (Rio Grande do Sul State).The winter meteorological and oceanographic features were considered in the determination of ship s route. The installation of a micrometeorological tower at the bow of the ship allowed the realization of direct measurements of heat, momentum and CO2 fluxes. This study analyses the large scale meteorological conditions and explores the behavior of the marine atmospheric boundary layer using radiosondes data taken in situ. In the period when the data were collect, typical winter conditions were observed in the study area, like the cold front passage associated to an incursion of a post-frontal cold air mass and an extratropical cyclone formation. Meteorological and oceanographic measurements performed by the instruments installed on the ship were utilized to estimate the heat fluxes through bulk formulas method. This estimates were lately compared to the heat fluxes measured directly by the sensors installed in the of the ship s bow. Measurements were obtained using the Eddy Covariance method, broadly used in micrometeorological research. To obtain the turbulent fluxes at the ocean-atmosphere interface adjustments in the observational data are necessary due to the ship s motion. During most of the study period, the sea surface temperature was higher than the air temperature, thus generating a heat transfer from the ocean to the atmosphere. The heat fluxes were commonly positive on both sides of the BC (warm)/BCC (cold) oceanographic front. However, there was some difference on the heat fluxes magnitude between the two sides of the front with more intense heat exchange on the BC side. The present results show that the intense thermal horizontal gradients between the BC and the BCC waters that occur during winter in the southern coast of Brazil, the transient atmospheric systems and the air thermal advection have an important role on the marine atmospheric boundary layer modulation and on the heat and CO2 fluxes between the ocean and the atmosphere. Meteorological and oceanographic observations are fundamental to widen our understanding of the processes occurring at the ocean-atmosphere interface which are known to have primary importance on weather and climate forecast. |
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2015-03-182015-03-182014-07-11FARIAS, Priscila Cavalheiro. Heat and carbon dioxide fluxes between ocean and atmosphere in coast and oceanic regions at South of Brazil. 2014. 91 f. Dissertação (Mestrado em Geociências) - Universidade Federal de Santa Maria, Santa Maria, 2014.http://repositorio.ufsm.br/handle/1/10280The Southwest Atlantic Ocean is characterized, in winter, by the presence of an oceanographic front between the Brazil Current (BC) and the Brazilian Coastal Current (BCC). The BC/BCC oceanographic front generates intense thermal horizontal gradients between cold waters of the southern Brazilian continental shelf, dominated by the BCC, and the offshore warm waters, dominated by the BC. This study analyses, for the first time in the known literature, the coupling mechanisms between the ocean and the atmosphere from observational data taken simultaneously during an oceanographic research cruise in the southern Brazilian coast during 11-21 June 2014. In this field experiment, atmospheric radiosondes were launched and hydrographic stations were taken to measure the ocean s temperature and salinity. The study area was chosen based on the local thermal gradients presented by the BC/BCC front. Five oceanographic transects were performed perpendicular to the coast starting at the locality of Paranaguá (Paraná State) and ending in Chuí (Rio Grande do Sul State).The winter meteorological and oceanographic features were considered in the determination of ship s route. The installation of a micrometeorological tower at the bow of the ship allowed the realization of direct measurements of heat, momentum and CO2 fluxes. This study analyses the large scale meteorological conditions and explores the behavior of the marine atmospheric boundary layer using radiosondes data taken in situ. In the period when the data were collect, typical winter conditions were observed in the study area, like the cold front passage associated to an incursion of a post-frontal cold air mass and an extratropical cyclone formation. Meteorological and oceanographic measurements performed by the instruments installed on the ship were utilized to estimate the heat fluxes through bulk formulas method. This estimates were lately compared to the heat fluxes measured directly by the sensors installed in the of the ship s bow. Measurements were obtained using the Eddy Covariance method, broadly used in micrometeorological research. To obtain the turbulent fluxes at the ocean-atmosphere interface adjustments in the observational data are necessary due to the ship s motion. During most of the study period, the sea surface temperature was higher than the air temperature, thus generating a heat transfer from the ocean to the atmosphere. The heat fluxes were commonly positive on both sides of the BC (warm)/BCC (cold) oceanographic front. However, there was some difference on the heat fluxes magnitude between the two sides of the front with more intense heat exchange on the BC side. The present results show that the intense thermal horizontal gradients between the BC and the BCC waters that occur during winter in the southern coast of Brazil, the transient atmospheric systems and the air thermal advection have an important role on the marine atmospheric boundary layer modulation and on the heat and CO2 fluxes between the ocean and the atmosphere. Meteorological and oceanographic observations are fundamental to widen our understanding of the processes occurring at the ocean-atmosphere interface which are known to have primary importance on weather and climate forecast.O Oceano Atlântico Sudoeste é caracterizado, no inverno, pela presença de uma frente oceanográfica entre a Corrente do Brasil (CB) e a Corrente Costeira do Brasil (CCB). A frente oceanográfica CB/CCB gera intensos gradientes horizontais termais entre as águas frias da plataforma continental do Sul do Brasil, dominadas pela CCB, e águas quentes do oceano profundo, dominadas pela CB. Esse trabalho analisa, pela primeira vez na literatura conhecida, os mecanismos de acoplamento entre o oceano e a atmosfera a partir de dados observacionais da atmosfera e do oceano que foram tomados simultaneamente durante um cruzeiro de pesquisa oceanográfica na costa sul do Brasil entre 11 a 21 de junho de 2012. Nesse experimento, foram lançadas radiossondas atmosféricas e realizadas estações hidrográficas para medidas de temperatura e salinidade do oceano. A área de estudo foi escolhida com base no gradiente termal local apresentado pela frente CB/CCB. Foram realizados cinco transectos perperndiculares à costa sul do Brasil, iniciando-se na localidade de Paranaguá (PR) até o Chuí (Rio Grande do Sul). As características oceanográficas e meteorológicas de inverno foram consideradas na determinação da derrota do navio. A instalação de uma torre micrometeorológica na proa do navio permitiu a realização de medições diretas dos fluxos de calor, momentum e CO2. Este estudo analisa as condições meteorológicas de grande escala e investiga o comportamento da camada limite atmosférica marinha a partir dos dados in situ das radiossondagens. No período em que os dados foram coletados foram observadas condições atmosféricas típicas de inverno, como a passagem de frente fria associada à incursão de uma massa de ar frio pós-frontal e a formação de ciclone extratropical. Observações meteorológicas e oceanográficas realizadas pelos instrumentos instalados no navio foram utilizadas para estimar os fluxos de calor pelo método bulk formulas. Essas estimativas foram comparadas aos fluxos medidos diretamente pelos sensores instalados na proa do navio. As medidas são obtidas utilizando o método de Covariância de Vórtices, usado amplamente em pesquisas micrometeorológicas. Para obter os fluxos turbulentos na interação oceano-atmosfera são necessárias correções nos dados observados devido ao movimento do navio. Durante a maior parte do período estudo, a temperatura da superfície do mar esteve maior do que a temperatura do ar, gerando uma transferência de calor do oceano para atmosfera. Os fluxos de calor foram, geralmente, positivos em ambos os lados da frente oceanográfica CB (quente)/CCB (frio). Contudo, há diferença na magnitude dos fluxos de calor entre os dois lados da frente com a troca foi mais intensa no lado da CB. Os resultados apresentados mostram que os intensos gradientes horizontais termais entre as águas da CB e da CCB que ocorrem durante o inverno ao largo da costa do RS, os sistemas transientes e as advecções térmicas têm um papel importante na modulação da camada limite atmosférica marinha e nos fluxos de calor e CO2. Observações meteorológicas e oceanográficas são fundamentais para ampliar o entendimento dos processos que ocorrem na interface oceano-atmosfera e tem importância primária para a previsão do tempo e clima.application/pdfporUniversidade Federal de Santa MariaPrograma de Pós-Graduação em MeteorologiaUFSMBRMeteorologiaFluxos de calorFluxos de CO2Corrente costeira do BrasilCamada limite atmosférica marinhaHeat fluxesCO2 fluxBrazilian coastal currentMarine atmospheric boundary layerCNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::METEOROLOGIAFluxos de calor e dióxido de carbono entre o oceano e a atmosfera na região costeira e oceânica ao Sul do BrasilHeat and carbon dioxide fluxes between ocean and atmosphere in coast and oceanic regions at South of Brazilinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisSouza, Ronald Buss dehttp://lattes.cnpq.br/0537824080913130Pezzi, Luciano Ponzihttp://lattes.cnpq.br/9168878830863753Acevedo, Otávio Costahttp://lattes.cnpq.br/8696858608013659Möller Junior, Osmar Olintohttp://lattes.cnpq.br/4491693491877532http://lattes.cnpq.br/1792473802232374Farias, Priscila Cavalheiro100700300004400500300300500300b35f3be5-481e-42f0-a76e-056024ce6780909f45f3-0a9f-4d80-a103-30f41f6ed8e76102bbd8-6ce7-47ed-939c-aa978893def8b0b3ff17-e5f1-4940-bdf6-517e910f19c36e506d41-caa4-4eb9-8aa6-af9fe96bdc18info:eu-repo/semantics/openAccessreponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMORIGINALFARIAS, PRISCILA CAVALHEIRO.pdfapplication/pdf43878214http://repositorio.ufsm.br/bitstream/1/10280/1/FARIAS%2c%20PRISCILA%20CAVALHEIRO.pdf8bd27e466b7d8da23738203eda6a94bdMD51TEXTFARIAS, PRISCILA CAVALHEIRO.pdf.txtFARIAS, PRISCILA CAVALHEIRO.pdf.txtExtracted texttext/plain138955http://repositorio.ufsm.br/bitstream/1/10280/2/FARIAS%2c%20PRISCILA%20CAVALHEIRO.pdf.txt21406077186c0e3d17b26a5e76ed0786MD52THUMBNAILFARIAS, PRISCILA CAVALHEIRO.pdf.jpgFARIAS, PRISCILA CAVALHEIRO.pdf.jpgIM Thumbnailimage/jpeg4841http://repositorio.ufsm.br/bitstream/1/10280/3/FARIAS%2c%20PRISCILA%20CAVALHEIRO.pdf.jpgf2c7f5ce8c722db5566d6a2ca57962b3MD531/102802022-01-12 11:21:39.129oai:repositorio.ufsm.br:1/10280Repositório Institucionalhttp://repositorio.ufsm.br/PUBhttp://repositorio.ufsm.br/oai/requestopendoar:39132022-01-12T14:21:39Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false |
dc.title.por.fl_str_mv |
Fluxos de calor e dióxido de carbono entre o oceano e a atmosfera na região costeira e oceânica ao Sul do Brasil |
dc.title.alternative.eng.fl_str_mv |
Heat and carbon dioxide fluxes between ocean and atmosphere in coast and oceanic regions at South of Brazil |
title |
Fluxos de calor e dióxido de carbono entre o oceano e a atmosfera na região costeira e oceânica ao Sul do Brasil |
spellingShingle |
Fluxos de calor e dióxido de carbono entre o oceano e a atmosfera na região costeira e oceânica ao Sul do Brasil Farias, Priscila Cavalheiro Fluxos de calor Fluxos de CO2 Corrente costeira do Brasil Camada limite atmosférica marinha Heat fluxes CO2 flux Brazilian coastal current Marine atmospheric boundary layer CNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::METEOROLOGIA |
title_short |
Fluxos de calor e dióxido de carbono entre o oceano e a atmosfera na região costeira e oceânica ao Sul do Brasil |
title_full |
Fluxos de calor e dióxido de carbono entre o oceano e a atmosfera na região costeira e oceânica ao Sul do Brasil |
title_fullStr |
Fluxos de calor e dióxido de carbono entre o oceano e a atmosfera na região costeira e oceânica ao Sul do Brasil |
title_full_unstemmed |
Fluxos de calor e dióxido de carbono entre o oceano e a atmosfera na região costeira e oceânica ao Sul do Brasil |
title_sort |
Fluxos de calor e dióxido de carbono entre o oceano e a atmosfera na região costeira e oceânica ao Sul do Brasil |
author |
Farias, Priscila Cavalheiro |
author_facet |
Farias, Priscila Cavalheiro |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Souza, Ronald Buss de |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/0537824080913130 |
dc.contributor.advisor-co1.fl_str_mv |
Pezzi, Luciano Ponzi |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://lattes.cnpq.br/9168878830863753 |
dc.contributor.referee1.fl_str_mv |
Acevedo, Otávio Costa |
dc.contributor.referee1Lattes.fl_str_mv |
http://lattes.cnpq.br/8696858608013659 |
dc.contributor.referee2.fl_str_mv |
Möller Junior, Osmar Olinto |
dc.contributor.referee2Lattes.fl_str_mv |
http://lattes.cnpq.br/4491693491877532 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/1792473802232374 |
dc.contributor.author.fl_str_mv |
Farias, Priscila Cavalheiro |
contributor_str_mv |
Souza, Ronald Buss de Pezzi, Luciano Ponzi Acevedo, Otávio Costa Möller Junior, Osmar Olinto |
dc.subject.por.fl_str_mv |
Fluxos de calor Fluxos de CO2 Corrente costeira do Brasil Camada limite atmosférica marinha |
topic |
Fluxos de calor Fluxos de CO2 Corrente costeira do Brasil Camada limite atmosférica marinha Heat fluxes CO2 flux Brazilian coastal current Marine atmospheric boundary layer CNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::METEOROLOGIA |
dc.subject.eng.fl_str_mv |
Heat fluxes CO2 flux Brazilian coastal current Marine atmospheric boundary layer |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::METEOROLOGIA |
description |
The Southwest Atlantic Ocean is characterized, in winter, by the presence of an oceanographic front between the Brazil Current (BC) and the Brazilian Coastal Current (BCC). The BC/BCC oceanographic front generates intense thermal horizontal gradients between cold waters of the southern Brazilian continental shelf, dominated by the BCC, and the offshore warm waters, dominated by the BC. This study analyses, for the first time in the known literature, the coupling mechanisms between the ocean and the atmosphere from observational data taken simultaneously during an oceanographic research cruise in the southern Brazilian coast during 11-21 June 2014. In this field experiment, atmospheric radiosondes were launched and hydrographic stations were taken to measure the ocean s temperature and salinity. The study area was chosen based on the local thermal gradients presented by the BC/BCC front. Five oceanographic transects were performed perpendicular to the coast starting at the locality of Paranaguá (Paraná State) and ending in Chuí (Rio Grande do Sul State).The winter meteorological and oceanographic features were considered in the determination of ship s route. The installation of a micrometeorological tower at the bow of the ship allowed the realization of direct measurements of heat, momentum and CO2 fluxes. This study analyses the large scale meteorological conditions and explores the behavior of the marine atmospheric boundary layer using radiosondes data taken in situ. In the period when the data were collect, typical winter conditions were observed in the study area, like the cold front passage associated to an incursion of a post-frontal cold air mass and an extratropical cyclone formation. Meteorological and oceanographic measurements performed by the instruments installed on the ship were utilized to estimate the heat fluxes through bulk formulas method. This estimates were lately compared to the heat fluxes measured directly by the sensors installed in the of the ship s bow. Measurements were obtained using the Eddy Covariance method, broadly used in micrometeorological research. To obtain the turbulent fluxes at the ocean-atmosphere interface adjustments in the observational data are necessary due to the ship s motion. During most of the study period, the sea surface temperature was higher than the air temperature, thus generating a heat transfer from the ocean to the atmosphere. The heat fluxes were commonly positive on both sides of the BC (warm)/BCC (cold) oceanographic front. However, there was some difference on the heat fluxes magnitude between the two sides of the front with more intense heat exchange on the BC side. The present results show that the intense thermal horizontal gradients between the BC and the BCC waters that occur during winter in the southern coast of Brazil, the transient atmospheric systems and the air thermal advection have an important role on the marine atmospheric boundary layer modulation and on the heat and CO2 fluxes between the ocean and the atmosphere. Meteorological and oceanographic observations are fundamental to widen our understanding of the processes occurring at the ocean-atmosphere interface which are known to have primary importance on weather and climate forecast. |
publishDate |
2014 |
dc.date.issued.fl_str_mv |
2014-07-11 |
dc.date.accessioned.fl_str_mv |
2015-03-18 |
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2015-03-18 |
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info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
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publishedVersion |
dc.identifier.citation.fl_str_mv |
FARIAS, Priscila Cavalheiro. Heat and carbon dioxide fluxes between ocean and atmosphere in coast and oceanic regions at South of Brazil. 2014. 91 f. Dissertação (Mestrado em Geociências) - Universidade Federal de Santa Maria, Santa Maria, 2014. |
dc.identifier.uri.fl_str_mv |
http://repositorio.ufsm.br/handle/1/10280 |
identifier_str_mv |
FARIAS, Priscila Cavalheiro. Heat and carbon dioxide fluxes between ocean and atmosphere in coast and oceanic regions at South of Brazil. 2014. 91 f. Dissertação (Mestrado em Geociências) - Universidade Federal de Santa Maria, Santa Maria, 2014. |
url |
http://repositorio.ufsm.br/handle/1/10280 |
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por |
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