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		<doi>10.1016/j.atmosres.2020.105299</doi>
		<issn>0169-8095</issn>
		<citationkey>CerónKAAAFMS:2021:ReInEx</citationkey>
		<title>Recent intensification of extreme precipitation events in the La Plata Basin in Southern South America (1981–2018)</title>
		<year>2021</year>
		<month>Feb.</month>
		<typeofwork>journal article</typeofwork>
		<secondarytype>PRE PI</secondarytype>
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		<author>Cerón, Wilmar L.,</author>
		<author>Kayano, Mary Toshie,</author>
		<author>Andreoli, Rita V.,</author>
		<author>Avila-Diaz, Alvaro,</author>
		<author>Ayes, Irma,</author>
		<author>Freitas, Edmilson D.,</author>
		<author>Martins, Jorge A.,</author>
		<author>Souza, Rodrigo A. F.,</author>
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		<group>DIMNT-CGCT-INPE-MCTI-GOV-BR</group>
		<affiliation>Universidad del Valle</affiliation>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<affiliation>Universidade do Estado do Amazonas (UEA)</affiliation>
		<affiliation>Universidade Federal de Viçosa (UFV)</affiliation>
		<affiliation>Instituto Nacional de Pesquisas da Amazônia (INPA)</affiliation>
		<affiliation>Universidade de São Paulo (USP)</affiliation>
		<affiliation>Universidade Federal Tecnológica do Paraná (UFTPR)</affiliation>
		<affiliation>Universidade do Estado do Amazonas (UEA)</affiliation>
		<electronicmailaddress>wilmar.ceron@correounivalle.edu.co</electronicmailaddress>
		<electronicmailaddress>mary.kayano@inpe.br</electronicmailaddress>
		<journal>Atmospheric Research</journal>
		<volume>249</volume>
		<pages>e105299</pages>
		<secondarymark>A1_INTERDISCIPLINAR A1_CIÊNCIAS_AMBIENTAIS A2_GEOCIÊNCIAS A2_CIÊNCIAS_AGRÁRIAS_I B1_MATEMÁTICA_/_PROBABILIDADE_E_ESTATÍSTICA B1_ENGENHARIAS_IV B1_ENGENHARIAS_III B1_ENGENHARIAS_II B1_BIODIVERSIDADE B2_ASTRONOMIA_/_FÍSICA</secondarymark>
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		<keywords>La Plata Basin, Precipitation trends and changes, Extreme daily rainfall, Climate extreme indices, CHIRPS.</keywords>
		<abstract>Changes and trends in ten extreme daily rainfall indices in the La Plata Basin (LPB) during the 19812018 period were analyzed. These indices were evaluated for three regions in the LPB, namely the northern, central, and southern LPB (N-LPB, C-LPB, and S-LPB, respectively). A decrease in the maximum rainfall over five consecutive days (RX5day) and an increase in the consecutive dry days (CDD) were observed in N-LPB, mainly during the austral winter. An increase in the total wet-day precipitation was found in S-LPB, particularly during SeptemberNovember (SON), and during DecemberFebruary (DJF). The number of heavy precipitation days (R10mm) and CDD indices in S-LPB during SON showed a breaking point in 1999 and were followed by an increase in R10mm after 1999. Therefore, we discussed the large-scale climatic features that could be related to the breaking point in the extreme precipitation indices found in the S-LPB during SON, through correlation analysis. Our results indicate that R10mm shows significant positive correlations with the sea surface temperature (SST) in the Southwestern Subtropical Atlantic Region, mainly between 32°S22°S and 50 W34°W. The SST anomaly index in this oceanic region for SON during 19812018 displayed a significant upward change in 1999. Furthermore, the correlation map between this index and the vertically integrated moisture flux (VIMF) and its divergence, shows negative correlations in the S-LPB, which means a decrease of the moisture divergence in this region. This implies an increase (decrease) of R10mm, and a decrease (increase) of CDD in the S-LPB after (before) 1999. This relationship results from an anticyclone in the Southwestern Atlantic extending into the LPB up to 60°W, which causes an increase in the northwesterly moisture flux over central and southern parts of the basin, enhancing the moisture convergence over S-LPB. These insights have not been discussed previously, and might be relevant for future modeling studies and monitoring tasks.</abstract>
		<area>MET</area>
		<language>en</language>
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