@InProceedings{PenalbaRobl:2006:TrExDa,
               author = "Penalba, Olga C. and Robledo, Federico A.",
          affiliation = "{Departamento de Ciencias de la Atm{\'o}sfera y los Oc{\'e}anos} 
                         and {Facultad de Cs Exactas y Naturales -Universidad de Buenos 
                         Aires}",
                title = "Trends in extreme daily rainfall events in La Plata Basin",
            booktitle = "Proceedings...",
                 year = "2006",
               editor = "Vera, Carolina and Nobre, Carlos",
                pages = "341--352",
         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 = "extreme daily rainfall , La Plata Basin.",
             abstract = "Extreme rainfall events cause significant damage to agriculture, 
                         ecology, disruption to human activities, for example. To 
                         understand how these changes could influence society and 
                         ecosystems, it is useful first to know how these extremes are 
                         changing through the years. The objective of this work is to 
                         analyze the temporal variability of the frequency of daily 
                         precipitation with special attention to interdecadal and 
                         interannual variations. This frequency was determined for daily 
                         precipitation events of at least 0.1, 2, 5, 10, 30, 50, 80, 100 mm 
                         and also their own the 75th, 90th and 95th percentiles. The 
                         persistence of rainday and no rainday was also analyzed by 
                         assessing the probability of rainday when the day before was a 
                         rain day and the probability of no rainday when the day before was 
                         a no rainday. This study is perform for different months of the 
                         year and also for the annual behavior. The region under study is 
                         part of the La Plata basin, and forms the most important 
                         agricultural and hydrologic center of Argentina. Twenty five 
                         Argentine stations analyzed are located north of 37°S and east of 
                         67°W. Two stations in Uruguay and seven stations in Paraguay and 
                         south of Brazil are used in order to improve spatial coverage in 
                         the east and north of Argentina. The data used were processed to 
                         obtain consistent homogeneous databases, with less than 10% of 
                         months missing for their period of record, with the shorter period 
                         1960-2003 and the longest one 1908-2003. In general, the results 
                         show a variability that is highly non-stationary. The most 
                         outstanding feature is the difference in the annual frequency 
                         before and after the 1960s. The interdecadal variability is 
                         particularly well defined in the west and there is a general 
                         significant linear trend in the study area. This interdecadal 
                         variations affect the behavior of extreme precipitation in the 
                         annual scale and during the months with maximum precipitation in 
                         the region. The frequencies calculated in the whole year showed a 
                         significant positive trend in some regions of Argentina. The 
                         pattern of trends for extreme events has the same spatial 
                         behavior, but covering smaller regions. The Argentine and 
                         Brazilian stations located around 28ºS and 57ºW show a significant 
                         positive trend in the whole year and during summer and autumn 
                         months. Meanwhile in the northeast Argentine stations show a 
                         negative trend. The increases in the frequency of events greater 
                         than their own percentiles are also evident, indicating that at 
                         least a portion of the increase in precipitation is due to an 
                         increase in the frequency of extreme events. The persistence of 
                         rainday in the year shows significant positive trend in the 
                         stations located in the northeast of Argentina and southeast of 
                         Brazil.",
  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/2005/10.28.17.39",
                  url = "http://urlib.net/ibi/cptec.inpe.br/adm_conf/2005/10.28.17.39",
           targetfile = "341-352.pdf",
                 type = "Climate change in the SH",
        urlaccessdate = "20 maio 2024"
}