Variações de temperatura no Continente Antártico: observações e reanálises

• Ano de defesa: 2012
• Autor(a) principal: Lindemann, Douglas da Silva
• Orientador(a): Justino, Flávio Barbosa
• Banca de defesa: Costa, Marcos Heil , Schaefer, Carlos Ernesto Gonçalves Reynaud
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Mestrado em Meteorologia Agrícola
• Departamento: Agrometeorologia; Climatologia; Micrometeorologia
• País: BR
• Palavras-chave em Português: Climatologia; Hidroclimatologia; Região polar austral
• Palavras-chave em Inglês: Climatology; Hydroclimatology, Austral Polar Region
• Área do conhecimento CNPq: CNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::METEOROLOGIA::CLIMATOLOGIA
• Link de acesso: http://locus.ufv.br/handle/123456789/5250

The polar regions are a very important component of Earth's climate system where significant annual and seasonal variations occur. Before this, the objective of this chapter is to analyze the variation of surface temperature in Antarctica and compare them the reanalysis, the analyze of influence that the modes of climate variability on the variation of surface temperature in Antarctica. The observed data used were obtained through READER. Already the reanalysis used were those of the NCEP/NCAR, ERA-Interim and MERRA. With the goal of having a local analysis, the Antarctic continent was divided into five sectors. After the analysis by regions of Antarctica, it became clear that the continent has undergone changes in surface air temperature during the period 1989 to 2009. South Shetland Islands was the sector that has adverse result to compare with the rest of the continent, the trend changed heating to cooling. Another important feature about the trend of temperature in the Antarctic continent was that during the autumn the trend was significant warming in the region of East Antarctica (Continental and Pacific Ocean sectors) and sector of the Weddell Sea, much influenced by the AAO that was significantly correlated with temperature data, especially in the second decade (2000-2009) where the AAO showed a weakening. In terms of reanalysis, realizes that the MERRA presented the best performance for most regions. The only region that the reanalysis showed a weak performance was in the Ross Sea. It is concluded that when working with climate models that take into consideration the reanalysis for Antarctic region, care should be taken to examine the study period and which the region. In order to take into account more than one review for better performance.