@InProceedings{GomesCavaMüll:2022:AtOcIn,
               author = "Gomes, Mariah Sousa and Cavalcanti, Iracema Fonseca de Albuquerque 
                         and M{\"u}ller, Gabriela",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)}",
                title = "The Atmospheric and Oceanic Influences on the 2019/20 South 
                         America Drought",
                 year = "2022",
         organization = "American Meteorological Society Annual Meeting, 102.",
            publisher = "AMS",
             abstract = "Several atmospheric and oceanic features during 2019/2020 affected 
                         South America, resulting in a severe drought that caused many 
                         impacts on several sectors, as agriculture, water resources, and 
                         environment. In a regional scale, there was a reduction of 
                         humidity flux over the continent, and in a large scale, the 
                         occurrence of different processes could have contributed to the 
                         dry conditions. There was a persistent pattern of west-east 
                         convection anomalies in the tropical Pacific, and a reduction of 
                         kinetic energy in the atmosphere over the South Pacific that could 
                         be related to the steady conditions observed over South America 
                         and southeast South Atlantic from September 2019 to March 2020. 
                         The extreme positive phase of the Indian Ocean Dipole during 2019 
                         austral spring was another event that could have influenced 
                         temperature and precipitation in South America. The Sudden 
                         Stratospheric Warming that occurred in September 2019 induced the 
                         negative phase of the Southern Annular Mode in December, which 
                         generated subsidence over the subtropics and affected the 
                         precipitation over South America. In addition, from September 2019 
                         to March 2020, the heating observed in the stratosphere propagated 
                         to the troposphere over South America. During the whole period, 
                         there were positive SST anomalies in all oceans, mainly in the 
                         North Atlantic Ocean, which could have contributed also to 
                         subsidence over South America through a meridional circulation. At 
                         the end of the studied period, the development of La Niña extended 
                         the situation of reduced precipitation in South Brazil.",
  conference-location = "Houston, Texas",
      conference-year = "23-27 jan. 2022",
             language = "en",
        urlaccessdate = "25 jun. 2024"
}