| Journal: | Revista brasileira de geofisica |
| Database: | PERIÓDICA |
| System number: | 000340293 |
| ISSN: | 0102-261X |
| Authors: | Azevedo, Jose Luiz Lima de1 Oliveira, Leopoldo Rota de1 Souza, Jose Francisco Almeida de1 Soares, Ivan Dias1 Mata, Mauricio Magalhaes1 |
| Institutions: | 1Universidade Federal do Rio Grande, Instituto de Oceanografia, Rio Grande, Rio Grande do Sul. Brasil |
| Year: | 2008 |
| Season: | Abr-Jun |
| Volumen: | 26 |
| Number: | 2 |
| Pages: | 153-172 |
| Country: | Brasil |
| Language: | Portugués |
| Document type: | Artículo |
| Approach: | Analítico, descriptivo |
| English abstract | The energetic analysis is an important diagnostic tool for the identification of dynamic processes associated with events of energy conversion in the ocean. In brief, that analysis shows the energetic interactions which are taking place among the mean and eddy fields of a certain geophysical flow, as well as the transfers involved between the reservoirs of energy in the oceans. Those processes are detailed in the Lorenz Diagram which links, through four boxes, the reservoirs of the mean kinetic energy, eddy kinetic energy, mean potential energy and eddy potential energy of the flow. Moreover, the Diagram identifies the interactions that occur between those four energy forms, as well as the exchanges through the boundaries (sources and sinks). After an extensive review, we have identified that the specialized literature lacks in texts which detail the several mechanisms of energetic conversion among the main forms of energy in the oceans, with most publications detailing only part of those components. This article presents a detailed review on this subject, gathering information of several sources and having as main objective the step by step construction of the Lorenz Diagram, with their respective formulations. The discussion of each term of the Diagram is presented objectively thus enabling a better understanding of this tool, which is instrumental in summarizing the energy processes at a given area of the ocean |
| Portuguese abstract | A analise energetica e uma importante ferramenta diagnostica para a identificacao de processos dinamicos associados a eventos de conversao de energia no oceano. Esta analise, de uma forma sucinta, procura mostrar as interacoes energeticas que ocorrem entre os campos medio e turbulento de um determinado escoamento geofısico, bem como as transferencias entre os reservatorios de energia nos oceanos. Estes processos sao sumarizados pelo Diagrama de Lorenz que representa, atraves de quatro caixas, os reservatorios das energias cinetica media, cinetica turbulenta, potencial m´edia e potencial turbulenta do escoamento do fluido geofısico, identificando as interacoes que ocorrem entre estas quatro formas de energia, bem como as trocas com o meio externo (fontes e sumidouros). Notadamente a literatura especializada e escassa em textos que detalhem os diversos mecanismos de conversao energetica entre as principais formas de energia nos oceanos, havendo algumas publicacoes que, dependendo da abordagem, detalham apenas alguns deles. Este trabalho apresenta uma revisao sobre o assunto, reunindo informacoes de diversas fontes e tendo como objetivo principal a construcao, passo a passo, do Diagrama de Lorenz, com suas respectivas formulacoes. A discussao de cada termo do Diagrama e apresentada objetivamente, o que possibilitara um melhor entendimento desta ferramenta, a qual e de real importancia para a sumarizacao de uma estimativa energetica para uma dada regiao do oceano |
| Disciplines: | Geociencias |
| Keyword: | Geofísica, Oceanografía, Diagrama de Lorenz, Energía potencial, Energía cinética, Conversión barotrópica, Conversión baroclínica |
| Keyword: | Earth sciences, Geophysics, Oceanography, Lorenz diagram, Potential energy, Kinetic energy, Barotropic conversion, Baroclinic conversion |
| Full text: | Texto completo (Ver PDF) |
