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| Titel |
Sea surface temperatures in the central southern Indian Ocean over the period 1790 to 2007 inferred from two monthly resolved Sr/Ca and oxygen isotope records |
| VerfasserIn |
J. Zinke, J. Wassenburg, E. Hardman |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250020796
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| Zusammenfassung |
| We obtained two monthly resolved Sr/Ca records from Rodrigues island (Mauritius) located in the trade wind belt of the central southern Indian Ocean. The longest core was obtained at a nearshore fringing reef and covers the period 1790-2005. This coral records surface air temperatures from the local weather station available from 1950 to the present. The most remarkable signal is a slight cooling after the 1950’s. The second core was obtained from the open ocean and records a long-term warming trend between 1947 to 2007. The warming accelerated after the late 1970’s in agreement with instrumental data. The oxygen isotope record is affected by salinity variations and shows a strong freshening trend after the late 1970’s. The freshening trend is probably related to advection of low salinity waters with the South Equatorial Current and/or increased cyclonicity. We will discuss our results in light of interannual and decadal variability and present long-term seawater monitoring data. |
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