@InProceedings{AquinoSetzSimõ:2006:SuAtCi,
               author = "Aquino, Francisco E. and Setzer, Alberto Waingort and Sim{\~o}es, 
                         Jefferson C.",
          affiliation = "Universidade Federal do Rio Grande do Sul, UFRGS and Instituto 
                         Nacional de Pesquisas Espaciais, Centro de Previs{\~a}o Tempo e 
                         Estudos Clim{\'a}ticos (INPE.CPTEC) and Universidade Federal do 
                         Rio Grande do Sul, N{\'u}cleo de Pesquisas Ant{\'a}rticas e 
                         Clim{\'a}ticas (UFRGS.NUPAC)",
                title = "The sub-Antarctic atmospheric circulation between 15° W and 90° W 
                         and its effects on the climates of the Antarctic Peninsula and 
                         Southern South America",
            booktitle = "Proceedings...",
                 year = "2006",
                pages = "01",
         organization = "International Workshop Antartic Peninsula Climatic Variability: 
                         Observations, Models, and Plans for IPY Research.",
            publisher = "National Snow and Ice Data Center at the University of Colorado",
             keywords = "METEOROLOGY, Atmospheric circulation, Climate, Antarctic 
                         Peninsula, South America, METEOROLOGIA, Circula{\c{c}}{\~a}o 
                         atmosf{\'e}rica, Clima, Pen{\'{\i}}nsula Ant{\'a}rtica, 
                         Am{\'e}rica do Sul.",
             abstract = "Surface air temperature increases of up to about 3°C in the last 
                         50 years have been recorded in the western coast of the Antarctic 
                         Peninsula (AP). Following worldwide tendencies, temperatures in 
                         continental South America have also increased in the same period, 
                         but to a much smaller extent; southern Brazil shows for the same 
                         half century an increase of 0.4°C, which for the last 20 years 
                         amounts to less than 0.2°C. Most studies have focused on global 
                         and hemispherical atmospheric circulation patterns and indices 
                         averaged over seasons and years during long-term periods to 
                         explain the temperature variations in the AP. This paper considers 
                         specifically the longitude sector of 15° W to 90° W and shows that 
                         an important regional context in the scale of days can have marked 
                         effects in the temperatures of AP and in south South America as a 
                         result of meridional flows at surface level that result from 
                         synoptic systems in the region. Analyzing observational data for 
                         the period of 2004-2005 we show that cool and rainy spells in 
                         southeast South America result from the outflow of Weddell Sea 
                         surface air, and that increases of 10°C are common in the South 
                         Shetland Islands under northern flow from South America. The 
                         latitudinal position of the subpolar jet stream is one of the key 
                         factors in such synoptic configurations, and the further north it 
                         is located, the warmest temperatures are found in the north AP. An 
                         extended investigation for a period of 40 years to detail this 
                         meridional flow is under way to evaluate its effects in the 
                         warming records of AP temperatures.",
  conference-location = "Boulder, CO, USA",
      conference-year = "May, 14-17",
           copyholder = "SID/SCD",
             language = "en",
         organisation = "University of Colorado",
           targetfile = "Aquino.Sub-Antarctic.pdf",
        urlaccessdate = "29 jun. 2024"
}