The last 100,000 years in the western Mediterranean: sea surface water and frontal dynamics as revealed by coccolithophores

Flores, José Abel; Sierro, Francisco J.; Francés, Guillermo; Vázquez, Antonio

doi:10.1016/s0377-8398(96)00029-1

Cited by 147 publications

(75 citation statements)

References 38 publications

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“…From the Western Mediterranean, Flores et al (1997) and Colmenero-Hidalgo et al (2002), observed dissolution of E. huxleyi rather than overgrowth and similar observations were made on surface sediments by Cros (2002). Moreover, informal groups similar to those reported from the Eastern Mediterranean (Table 1) have not been observed in studies of the Western Mediterranean (e.g.…”

Section: Aegean Sea and Western Mediterraneansupporting

confidence: 80%

“…Moreover, informal groups similar to those reported from the Eastern Mediterranean (Table 1) have not been observed in studies of the Western Mediterranean (e.g. Flores et al, 1997). Given this it is possible that the EHMC* morphotype identified in our study reflects primary variation rather than overgrowth.…”

Section: Aegean Sea and Western Mediterraneansupporting

confidence: 61%

“…The dominance of E. huxleyi in the upper photic zone nannoflora of the Holocene and latest late Pleistocene is well documented both globally (e.g. Matsuoka and Okada, 1989;Rahman and de Vernal, 1994;Okada and Wells, 1997;Flores et al, 1999;Henriksson, 2000;Kinkel et al, 2000;Takahashi and Okada, 2000) and from the Mediterranean (Flores et al, 1997;Aksu et al, 1995a;Sbaffi et al, 2001).…”

Section: Holocene -Latest Late Pleistocene Reticulofenestridsmentioning

confidence: 93%

“…First, these variable assemblages are rarely recorded from other coeval sediments, even in the western Mediterranean (e.g. Flores et al, 1997;Sbaffi et al, 2001). Second, they are absent from modern assemblages, for example Ziveri et al (2000a) reported from Eastern Mediterranean surface sediments, abundant Reticulofenestra ''overcalcified'' sp.…”

Section: Authorsmentioning

confidence: 99%

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Abnormal carbonate diagenesis in Holocene–late Pleistocene sapropel-associated sediments from the Eastern Mediterranean; evidence from Emiliania huxleyi coccolith morphology

Crudeli

Young

Erba

et al. 2004

Marine Micropaleontology

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In studying the Holocene -late Pleistocene record of the Eastern Mediterranean, considerable Emiliania huxleyi size/shape variation not clearly assignable to primary or secondary calcification was observed. Accordingly, different morphotypes were distinguished by light microscope (LM).A subsequent scanning electron microscope (SEM) analysis of selected samples has indicated that Emiliania huxleyi coccoliths are variably affected by carbonate diagenesis in these sediments. A series of diagenetic stages were qualitatively defined, comprising well-preserved specimens, three overgrowth (OG1 to OG3) and one etching (E1) stage. Comparing SEM and LM observations, a tentative correlation between the E. huxleyi calcified LM-morphotypes and E. huxleyi SEM-overgrowth stages is proposed here.Our study not only indicates that Emiliania huxleyi coccoliths are strongly influenced by carbonate diagenesis, but also that they show effects of carbonate precipitation and dissolution much more clearly than other coccoliths. The relative abundances of the different LM-morphotypes were used to define an E. huxleyi overgrowth index (EXO) that qualitatively estimates carbonate precipitation/dissolution on coccoliths in this sediment. This resulted in definition of five ''Diagenetic'' intervals (D1 to D5). Deposition of sapropel S1 was a time of good preservation with variable dissolution and no overgrowth of E. huxleyi coccoliths, whereas calcite overgrowth was high during the Last Glacial Maximum (LGM) and interglacial period and, to a lesser extent, during the Younger Dryas and through the last 5 ka. D

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Section: Aegean Sea and Western Mediterraneansupporting

confidence: 80%

Section: Aegean Sea and Western Mediterraneansupporting

confidence: 61%

Section: Holocene -Latest Late Pleistocene Reticulofenestridsmentioning

confidence: 93%

Section: Authorsmentioning

confidence: 99%

See 2 more Smart Citations

Abnormal carbonate diagenesis in Holocene–late Pleistocene sapropel-associated sediments from the Eastern Mediterranean; evidence from Emiliania huxleyi coccolith morphology

Crudeli

Young

Erba

et al. 2004

Marine Micropaleontology

View full text Add to dashboard Cite

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“…C. pelagicus is an in di ca tor of cold and nu tri ent-rich wa ters (Okada and McIntyre, 1979;Win ter et al, 1994;Cachao and Moita, 2000), which is con sis tent with the estuarine cir cu lations in the Early Langhian. On the other hand, the oc cur rence of R. minuta in di cates en vi ron men tal stress char ac ter ized by sa lin ity and nu tri ent os cil la tions (Flores et al, 1997;Wells and Okada, 1997;Kameo, 2002;Wade and Brown, 2006). De te ri orat ing qual ity of sur face wa ters may be linked to sa lin ity os cil lations in a downwelling cir cu la tion re gime ex pand ing from the Med i ter ra nean to the Paratethys.…”

Section: Early Badenian Palaeoenvironment and Its Influence On Bioevementioning

confidence: 99%

Timing of Langhian bioevents in the Carpathian Foredeep and northern Pannonian Basin in relation to oceanographic, tectonic and climatic processes

Holcová

Doláková

Nehyba

et al. 2018

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Coccolithophores as proxy of seawater changes at orbital-to-millennial scale during middle Pleistocene Marine Isotope Stages 14-9 in North Atlantic core MD01-2446

et al. 2014

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Quantitative coccolithophore analyses were performed in core MD01-2446, located in the midlatitude North Atlantic, to reconstruct climatically induced sea surface water conditions throughout Marine Isotope Stages (MIS) 14-9. The data are compared to new and available paleoenvironmental proxies from the same site as well as other nearby North Atlantic records that support the coccolithophore signature at glacial-interglacial to millennial climate scale. Total coccolithophore absolute abundance increases during interglacials but abruptly drops during the colder glacial phases and deglaciations. Coccolithophore warm water taxa (wwt) indicate that MIS11c and MIS9e experienced warmer and more stable conditions throughout the whole photic zone compared to MIS13. MIS11 was a long-lasting warmer and stable interglacial characterized by a climate optimum during MIS11c when a more prominent influence of the subtropical front at the site is inferred. The wwt pattern also suggests distinct interstadial and stadial events lasting about 4-10 kyr. The glacial increases of Gephyrocapsa margereli-G. muellerae 3-4 μm along with higher values of C org , additionally supported by the total alkenone abundance at Site U1313, indicate more productive surface waters, likely reflecting the migration of the polar front into the midlatitude North Atlantic. Distinctive peaks of G. margereli-muellerae (>4 μm), C. pelagicus pelagicus, Neogloboquadrina pachyderma left coiling, and reworked nannofossils, combined with minima in total nannofossil accumulation rate, are tracers of Heinrich-type events during MIS12 and MIS10. Additional Heinrich-type events are suggested during MIS12 and MIS14 based on biotic proxies, and we discuss possible iceberg sources at these times. Our results improve the understanding of mid-Brunhes paleoclimate and the impact on phytoplankton diversity in the midlatitude North Atlantic region.

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The last 100,000 years in the western Mediterranean: sea surface water and frontal dynamics as revealed by coccolithophores

Cited by 147 publications

References 38 publications

Abnormal carbonate diagenesis in Holocene–late Pleistocene sapropel-associated sediments from the Eastern Mediterranean; evidence from Emiliania huxleyi coccolith morphology

Abnormal carbonate diagenesis in Holocene–late Pleistocene sapropel-associated sediments from the Eastern Mediterranean; evidence from Emiliania huxleyi coccolith morphology

Timing of Langhian bioevents in the Carpathian Foredeep and northern Pannonian Basin in relation to oceanographic, tectonic and climatic processes

Coccolithophores as proxy of seawater changes at orbital-to-millennial scale during middle Pleistocene Marine Isotope Stages 14-9 in North Atlantic core MD01-2446

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