@InProceedings{BerriBert:2006:DiStEn,
               author = "Berri, Guillermo J. and Bertossa, German",
          affiliation = "Department of Atmospheric and Oceanic Sciences, University of 
                         Buenos Aires, Buenos Aires, Argentina",
                title = "Diagnostic study of Enso modulation of low-level southward 
                         moisture flux across central South America during summer and its 
                         related precipitation",
            booktitle = "Proceedings...",
                 year = "2006",
               editor = "Vera, Carolina and Nobre, Carlos",
                pages = "967--975",
         organization = "International Conference on Southern Hemisphere Meteorology and 
                         Oceanography, 8. (ICSHMO).",
            publisher = "American Meteorological Society (AMS)",
              address = "45 Beacon Hill Road, Boston, MA, USA",
             keywords = "Enso modulation, low-level moisture, summertime meridional 
                         transport , central South America.",
             abstract = "The ENSO modulation during summertime -October through March- of 
                         the low-level meridional moisture flux across Central South 
                         America -CESA- is studied by means of El Niņo -EN- and La Niņa 
                         -LN- composites of the NCEP/NCAR reanalysis and EUA_CRU 
                         precipitation database during recent decades. The period 
                         October-March of EN events is characterized by positive 
                         precipitation anomalies over northern Argentina, most of Paraguay, 
                         Uruguay and the extreme south of Brazil, and a well-defined 
                         anomalous moisture influx into northern and central Argentina, 
                         more marked during November, December and March. In January there 
                         seems to be a bifurcation of the water vapor flux anomalies coming 
                         from the NW into northern CESA, which directs moisture towards the 
                         east, into central-east Brazil, and to the south into northern 
                         Argentina, the two places which show positive precipitation 
                         anomalies. In a regional context, the period is characterized by 
                         the enhancement of the climatological water vapor flux (except in 
                         October), i.e. inflow over the northeastern part of the continent, 
                         counterclockwise shift and southeastward extension up to the 
                         midlatitudes of South America. The largest anomalies appear over a 
                         NW-SE moisture corridor across CESA. Over the eastern side of the 
                         continent, at tropical latitudes, the anomalies are very small and 
                         only important, in comparison to those at equatorial latitudes, 
                         during January (reduced influx) and February and March (enhanced 
                         influx). Over the northern part of the continent there is a 
                         reduced water valor influx in every month except October. During 
                         the same period of LN events, the conditions over the southern 
                         half of CESA are opposite to those observed during EN (except for 
                         January and February). The situation is now characterized by 
                         precipitation deficit and southwesterly water vapor flux anomalies 
                         (i.e. reduced northeasterly moisture influx). Instead January, and 
                         to a lesser degree February, display positive precipitation 
                         anomalies similar to those observed during EN events. In 
                         particular, January presents the largest observed water vapor flux 
                         anomalies. Over eastern CESA there is enhanced NW-SE moisture 
                         influx in coincidence with large positive precipitation anomalies. 
                         In a regional context the period is characterized by reduced 
                         moisture influx over northeastern South America and to a lesser 
                         degree over the north, in particular from December through March. 
                         Thus, over northern South America the water vapor flux anomalies 
                         during EN and LN behave in an opposite way. Over the eastern side 
                         of the continent, at tropical latitudes, there is reduced moisture 
                         influx anomalies that combined with the enhancement of the 
                         northwesterly moisture corridor that crosses CESA, create a large 
                         low-level anticyclonic circulation anomaly.",
  conference-location = "Foz do Igua{\c{c}}u",
      conference-year = "24-28 Apr. 2006",
             language = "en",
         organisation = "American Meteorological Society (AMS)",
                  ibi = "cptec.inpe.br/adm_conf/2005/10.27.22.06",
                  url = "http://urlib.net/ibi/cptec.inpe.br/adm_conf/2005/10.27.22.06",
           targetfile = "967-976.pdf",
                 type = "Monsoon systems and continental rainfall",
        urlaccessdate = "04 maio 2024"
}