Coccolithophores as palaeoecological indicators for shifts of the ITCZ in the Cariaco Basin during the Late Quaternary
Mertens, K.N.; Lynn, M.; Aycard, M.; Lin, H.-L.; Louwye, S. (2009). Coccolithophores as palaeoecological indicators for shifts of the ITCZ in the Cariaco Basin during the Late Quaternary, in: Mertens, K.N. Tracing hydrological millennial-scale cycles in the Late Quaternary of the Cariaco Basin and the southern Gulf of Cádiz using coccoliths and dinoflagellate cycts = Opsporing van hydrologische cycli op millenium-schaal in het late Quartair van het Cariaco Bekken en de zuidelijke Golf van Cádiz met behulp van coccolieten en dinoflagellatencysten. pp. 18-34 In: Mertens, K.N. (2009). Tracing hydrological millennial-scale cycles in the Late Quaternary of the Cariaco Basin and the southern Gulf of Cádiz using coccoliths and dinoflagellate cycts = Opsporing van hydrologische cycli op millenium-schaal in het late Quartair van het Cariaco Bekken en de zuidelijke Golf van Cádiz met behulp van coccolieten en dinoflagellatencysten. PhD Thesis. Department of Biology/Ghent University, Department of Geology and Soil Science: Gent. 205 pp., more Related to:Mertens, K.N.; Lynn, M.; Aycard, M.; Lin, H.-L.; Louwye, S. (2009). Coccolithophores as palaeoecological indicators for shifts of the ITCZ in the Cariaco Basin during the Late Quaternary. J. Quaternary Sci. 24(2): 159-174. http://dx.doi.org/10.1002/jqs.1194, more |
| Keywords | Coccoliths
Separation processes > Dissolution
Emiliania huxleyi (Lohmann) W.W.Hay & H.Mohler, 1967 [WoRMS]; Gephyrocapsa oceanica Kamptner, 1943 [WoRMS]
ASW, Venezuela, Cariaco Gulf [Marine Regions]
Marine/Coastal | | Author keywords | Cariaco; coccoliths; Quaternary; dissolution; GEX |
| Authors | | Top | - Mertens, K.N., more
- Lynn, M.
- Aycard, M.
| - Lin, H.-L.
- Louwye, S., more
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| Abstract | Coccoliths were studied from the ODP Hole 1002C and core PL07-39PC in the Cariaco Basin. Increases in Emiliania huxleyi are synchronous with decreases of Gephyrocapsa oceanica and vice versa. A new index (GEX) based on the relative abundances of these two taxa is proposed, and correlates with various other proxies. It is shown that GEX can serve as upwelling proxy. This confirms that the Intertropical Convergence Zone shifted north during the Bølling/Allerød, south during the Younger Dryas and back north during the Preboreal. The upwelling proxy shows few discrepancies with the terrigenous record. |
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