Fechar
Metadados

@Article{KayanoAndrSouz:2019:ElNiOs,
               author = "Kayano, Mary Toshie and Andreoli, Rita Val{\'e}ria and Souza, 
                         Rodrigo Augusto Ferreira de",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Universidade do Estado do Amazonas (UEAM)} and {Universidade do 
                         Estado do Amazonas (UEAM)}",
                title = "El Nino-Southern oscillation related teleconnections over South 
                         America under distinct Atlantic multidecadal oscillation and 
                         Pacific interdecadal oscillation backgrounds: La Nina",
              journal = "International Journal of Climatology",
                 year = "2019",
               volume = "39",
               number = "3",
                pages = "1359--1372",
                month = "mar.",
             keywords = "Atlantic Multidecadal Oscillation, climate variability, 
                         climatology, La Nina, Pacific Interdecadal Oscillation.",
             abstract = "The Pacific Interdecadal Oscillation (PDO) and the Atlantic 
                         Multidecadal Oscillation (AMO) influence in different ways the La 
                         Nina (LN) related teleconnections in South America. The 
                         low-frequency backgrounds in the Atlantic and Pacific Oceans play 
                         an important role in modulating the LN-related Walker and Hadley 
                         cells and the Rossby wavetrain pattern in the Southern Hemisphere. 
                         The illustration shows the LN-related SST anomaly pattern during 
                         the austral summer for distinct low-frequency backgrounds. This 
                         analysis investigates the concomitant influence of two dominant 
                         low-frequency modes, the Pacific Interdecadal Oscillation (PDO) 
                         and the Atlantic Multidecadal Oscillation (AMO), on the La Nina 
                         (LN) related climate teleconnections over South America (SA). Four 
                         possible low-frequency backgrounds are analysed: WAMO/WPDO, 
                         WAMO/CPDO, CAMO/WPDO and CAMO/CPDO, with the letters W and C 
                         referring, respectively, to the warm and cold phases of the AMO 
                         and PDO. The low-frequency anomalous sea surface cooling (warming) 
                         in the tropical Pacific during the CPDO (WPDO) favours (impedes) 
                         the settling of the LN-related negative SST anomalies in this 
                         oceanic sector. Thus, the LN-related SST anomaly patterns in the 
                         tropical Pacific in the CPDO backgrounds are meridionally more 
                         extensive and stronger than those in the WPDO backgrounds. The 
                         highest and lowest percentages of the years that experienced LN 
                         events occurred during the WAMO/CPDO and CAMO/WPDO backgrounds, 
                         respectively. The northern node of the LN-related wet-dry dipole 
                         between northern SA and southeastern SA (SESA) occurs in most 
                         seasons for all backgrounds. However, the southern node occurs in 
                         specific seasons: spring and summer for the WAMO/WPDO, winter and 
                         spring for the WAMO/CPDO, winter and summer for the CAMO/WPDO and 
                         spring for the CAMO/CPDO. Also, the LN effect on the South 
                         American monsoon with a wet-dry dipole between northern SA and 
                         eastern Brazil during summer is noted in most backgrounds, but 
                         with differences among them. We discuss here the differences in 
                         the precipitation anomaly patterns, Walker and Hadley cells and 
                         Rossby wavetrain patterns among the backgrounds. The low-frequency 
                         Atlantic and Pacific backgrounds play an important role in 
                         defining the rainfall anomaly pattern associated with the LN. The 
                         results shown here have not been discussed before and might be 
                         useful mainly for climate monitoring purposes.",
                  doi = "10.1002/joc.5886",
                  url = "http://dx.doi.org/10.1002/joc.5886",
                 issn = "0899-8418",
             language = "en",
           targetfile = "Kayano_et_al-2019-International_Journal_of_Climatology.pdf",
        urlaccessdate = "05 dez. 2020"
}


Fechar