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      Influence of the water content on X-ray fluorescence core-scanning measurements in soft marine sediments : XRF CORE SCANNING

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      Geochemistry, Geophysics, Geosystems
      American Geophysical Union (AGU)

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          Southward migration of the intertropical convergence zone through the Holocene.

          Titanium and iron concentration data from the anoxic Cariaco Basin, off the Venezuelan coast, can be used to infer variations in the hydrological cycle over northern South America during the past 14,000 years with subdecadal resolution. Following a dry Younger Dryas, a period of increased precipitation and riverine discharge occurred during the Holocene "thermal maximum." Since approximately 5400 years ago, a trend toward drier conditions is evident from the data, with high-amplitude fluctuations and precipitation minima during the time interval 3800 to 2800 years ago and during the "Little Ice Age." These regional changes in precipitation are best explained by shifts in the mean latitude of the Atlantic Intertropical Convergence Zone (ITCZ), potentially driven by Pacific-based climate variability. The Cariaco Basin record exhibits strong correlations with climate records from distant regions, including the high-latitude Northern Hemisphere, providing evidence for global teleconnections among regional climates.
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            • Record: found
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            Holocene rainfall variability in southern Chile: a marine record of latitudinal shifts of the Southern Westerlies

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              CORTEX, a shipboard XRF-scanner for element analyses in split sediment cores

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                Author and article information

                Journal
                Geochemistry, Geophysics, Geosystems
                Geochem. Geophys. Geosyst.
                American Geophysical Union (AGU)
                15252027
                February 2007
                February 2007
                : 8
                : 2
                : n/a
                Article
                10.1029/2006GC001393
                c08a9024-d043-4ab1-8e70-9f5783afa315
                © 2007

                http://doi.wiley.com/10.1002/tdm_license_1.1

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