Ortlieb Luc auteur aut IRD text bookSection eng text/pdf reformatted digital access The classical chronology of El Nino events for the past four and a half centuries proposed by Quinn et al. (1987) was primarily based upon indications of anomalous meteorological and hydrological phenomena observed in Peru and neighboring areas, as described by various authors and anonymous sources. This sequence of reconstructed El Nino events, later improved and modified by Quinn (1992, 1993 ; Quinn and Neal 1992), became the major reference for proxy calibrations and for most studies on climate variability related to El Nino/Southern Oscillation (ENSO) during historical, pre-instrumental, times. Precisely because global and regional records of interannual climate variability are becoming more diversified and accurate, there is an urgent need to reevaluate and consolidate the documentary record of El Nino manifestations, particularly in southwestern South America, a key area for ENSO studies. A preliminary revision of some of the sources used by Quinn et al. (1987) to elaborate on their record (Hocquenghem and Ortlieb 1992b) showed that some of the El Nino events were actually poorly documented and simply may not have occurred. For instance, some events had been reconstructed exclusively from evidence of Rimac River floods at Lima, while no clear relationship has been established between these floods and ENSO manifestations. Another question concerns the significance of anomalous rains in southern Peru : Do they correspond to El Nino situations, as inferred by Quinn et al., or rather to conditions associated with the opposite phase of the Southern Oscillation (La Nina) ? Furthermore, a previous analysis of documentary sources on rainfall excess in central Chile during the sixteenth through nineteenth centuries (Ortlieb 1994) revealed many discrepancies with respect to the regional El Nino record of Quinn... (D'après résumé d'auteur) specialized EL NINO CHANGEMENT CLIMATIQUE PALEOCLIMAT VARIATION SECULAIRE VARIATION INTERANNUELLE ANALYSE DIACHRONIQUE DONNEES MULTIDATES PLUVIOSITE SYNTHESE DOCUMENTAIRE HISTOIRE 1500 1900 PEROU CHILI EQUATEUR,AMERIQUE DU SUD COLON ARCHIPIELAGO 021CLIMAT Diaz H.F. ed. edt IRD Markgraf V. ed. edt IRD 207-295 Cambridge Cambridge University Press 2000 https://www.documentation.ird.fr/hor/fdi:010023699 [F B010023699] https://www.documentation.ird.fr/hor/fdi:010023699 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_7/b_fdi_57-58/010023699.pdf IRD - Base Horizon / Pleins textes 2001-01-11 2021-05-20 fdi:010023699 fre