Avaliação da intensidade e trajetórias dos ciclones extratropicais no hemisfério sul sob condições climáticas atuais e de aquecimento global

• Autor(a) principal: Freitas, Rose Ane Pereira de
• Data de Publicação: 2011
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/5242
• topic: Aquecimento global; Climatologia; Meteorologia agrícola; Global warming; Climatology; Agricultural meteorology; CNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::METEOROLOGIA::CLIMATOLOGIA

Extratropical cyclones are very important to define global climate. These systems are responsable for the heat transport to poles, preventing the continuous cooling of the extratropical region. The preferential areas of these baroclinic systems are called "Storm Tracks". Cyclones are directly associated to zonal and meridional air or surface temperature gradients. In this context, the variability and changes in the Storm Tracks behavior at present climate and in A1B for global warming scenario are investigated by using the coupled climate model ECHAM5/MPI-OM for the period between 1981 to 2000 (PD), and for global warming (GHG) for the period between 2081 to 2100. The results shows that the climate model used reproduces the variables and the distribuition of ST with reasonable consistency, when compared to the ERA-40 reanalises.It may be concluded that the path of extratropical cyclones delivered by the A1B scenario of global warming shows substantial modification in the sense that the ST moves southward in respect present day position demonstrates that variations in sea ice cover and sea surface temperature play the role heading in the magnitude and preferential area of cyclonic activity in the future climate scenario.