ENSO and Indian Ocean subtropical dipole variability is recorded in a coral record off southwest Madagascar for the period 1659 to 1995

J. Zinke, W.-C. Dullo, G.A. Heiss, A. Eisenhauer

    Research output: Contribution to JournalArticleAcademicpeer-review

    Abstract

    The Ifaty coral record from off SW Madagascar provide a 336-year coral oxygen isotope record that is used to investigate the natural variability of the western Indian Ocean subtropical SST dipole and ENSO. The coral oxygen isotope record primarily reflects past sea-surface temperature (SST) variability on seasonal to multidecadal scales. To validate the SST reconstructions derived from oxygen isotopes, Sr/Ca ratios were obtained for selected time windows (1973-1995, 1863-1910, 1784-1809, 1688-1710). The period 1675-1760 was found to be the coolest period of the entire record with anomalies of 0.3-0.5 °C that includes the Late Maunder Minimum (1675-1710). The warmest periods, as indicated by our data, occur between 1880 and 1900 and the upper part of the Ifaty record (1973-1995). We generated a time series of coral δ
    Original languageEnglish
    Pages (from-to)177-194
    JournalEarth and Planetary Science Letters
    Volume228
    DOIs
    Publication statusPublished - 2004

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