Northeastern Ionian Sea: Palaeoceanographic variability over the last 22 ka

Geraga, Maria; Mylona, G.; Tsaila-Monopoli, St.; Papatheodorou, George; Ferentinos, G.

doi:10.1016/j.jmarsys.2008.05.019

Cited by 45 publications

(51 citation statements)

References 66 publications

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“…5A,B, 6A,B). Similar climatic fluctuations have been recorded in the entire Mediterranean basin (Asioli et al, 2001;Cacho et al, 2001;Geraga et al, 2008Geraga et al, , 2010Kotthoff et al, 2011).…”

Section: Deglaciation (151e117 Ka)supporting

confidence: 81%

“…This assemblage is mainly dominated by species representative of warm and oligotrophic waters (G. ruber alba, G. ruber rosea, G. sacculifer, G. siphonifera, and O. universa), and shows a significant increase in the relative percentages of G. bulloides, compared to Cluster I. The latter is indicative of a relatively mesotrophic to eutrophic environment during the deposition of S1, and could be attributed to the increased riverine inputs in the surficial waters Zachariasse et al, 1997;Geraga et al, 2005Geraga et al, , 2008Geraga et al, , 2010.…”

Section: Q-mode Cluster Analysismentioning

confidence: 99%

“…6A), and is represented by SST indicator species Antonarakou et al, 2007;Geraga et al, 2008). It exhibits a strongly dipolar character (Table 4), with the negative pole to be dominated by species indicative of cold-water masses corresponding to the glacial fauna, while the positive component by species that characterize the water column of the Holocene in the north Aegean Sea.…”

Section: North Aegeanmentioning

confidence: 99%

“…Unfortunately, the presence of a turbidity horizon at this point does not allow for a detailed observation of the YD climate in order to insure the two phases recognized by the paleoclimatic indices of this period. However, the value which characterizes the YD is representative of this period as it is within the narrow context of isotope measurements have been recorded in all sub-basins of eastern Mediterranean Sea (Geraga et al, 2000(Geraga et al, , 2005(Geraga et al, , 2008(Geraga et al, , 2010Casford et al, 2002;Fhlaithearta et al, 2010 Mayewski et al, 2004) and/or increase of surface salinity. The negative d…”

Section: North Aegeanmentioning

confidence: 99%

“…6F,H) also suggest strong marine eutrophication attributed to the enhanced vertical mixing and upwelling phenomena. The development and the interpretation of the YD event in two phases (with the second phase less cold, arid and more gradual than the first one) has been recorded in the planktonic foraminifera and in marine data from the north Aegean Sea (Geraga et al, 2010), the Ionian Sea (Geraga et al, 2008) the western Mediterranean Sea (Cacho et al, 2001) as well as in north Aegean terrestrial data (Dormoy et al, 2009). The climatic amelioration at mid-time in the YD event has been attributed to a displacement of the polar front by a few degrees north (Cacho et al, 2001).…”

Section: Deglaciation (151e117 Ka)mentioning

confidence: 99%

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Late Quaternary paleoenvironmental reconstruction and paleoclimatic implications of the Aegean Sea (eastern Mediterranean) based on paleoceanographic indexes and stable isotopes

Kontakiotis

2016

Quaternary International

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a b s t r a c tThe Late Quaternary palaeoenvironmental evolution and the main palaeoceanographic changes of the Aegean Sea was reconstructed using planktonic foraminifera obtained from the sediments of a northern (SK-1) and a southern (NS-14) core site. Multivariate statistical approach, including Q-mode cluster and Principal Component (PCA) Analyses, gives an insight into the relationships between sea surface environmental changes between the north and south Aegean, and furthermore serves as a baseline data set for palaeoclimatic and palaeoceanographic reconstructions of the eastern Mediterranean Sea. Stable isotope analyses coupled with additional paleoceanographic (sea surface temperature (SST), productivity (SSP), stratification (S-index), upwelling (U-index), seasonality (Sn-index)) proxies provide insights into the sedimentological, hydrographic and trophic evolution and ecosystem dynamics of the Aegean Sea, and furthermore serve as a baseline data set for palaeoclimatic and palaeoceanographic reconstructions of the eastern Mediterranean Sea. Concentrating on the last~19 ka, faunal and isotopic data concur, suggesting a series of climatic zones, corresponding to well-known climatic phases of the last glacial cycle. Cold and arid conditions during the late glacial period were followed by a warmer and wetter climate trend during deglacial time. A marked seasonality, characterized by homogenous water column favored by efficient upwelling during the winter and by warm stratified water column during the summer, has also been recognized during this period (BøllingeAllerød e BeA) in both basins. An abrupt switch to cool, arid climatic event (Younger Dryas e YD) suggests a strengthening of winter convection around 12.9 ka, which seems to be more evident in the north Aegean core. However, the more pronounced environmental changes between the north and south Aegean Sea were identified during the Holocene, and they coincide with the deposition of sapropel S1 and Sapropel-Mid-Holocene (SMH). The comparison between SK-1 and NS-14 records indicated significant changes in both the productivity and stratification patterns, with the former the main factor in north Aegean and the latter in south Aegean for S1 deposition. Regarding the localized deposition of SMH in the semi-enclosed shallow south Aegean site, the fully oxygenated and less productive water column conditions prevailing during that time (5.4 e4.3 ka) in the north Aegean were the limiting factor for its deposition.

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Section: Deglaciation (151e117 Ka)supporting

confidence: 81%

Section: Q-mode Cluster Analysismentioning

confidence: 99%

Section: North Aegeanmentioning

confidence: 99%

Section: North Aegeanmentioning

confidence: 99%

Section: Deglaciation (151e117 Ka)mentioning

confidence: 99%

See 3 more Smart Citations

Late Quaternary paleoenvironmental reconstruction and paleoclimatic implications of the Aegean Sea (eastern Mediterranean) based on paleoceanographic indexes and stable isotopes

Kontakiotis

2016

Quaternary International

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Late Pleistocene Environmental Factors of the Aegean Region (Aegean Sea Including the Hellenic Arc) and the Identification of Potential Areas for Seabed Prehistoric Sites and Landscapes

Sakellariou

Lykousis

Geraga

et al. 2017

Submerged Landscapes of the European Continental Shelf

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The Late Holocene tephra record of the central Mediterranean Sea: Mapping occurrences and new potential isochrons for the 4.4–2.0 ka time interval

Insinga

Petrosino

Alberico

et al. 2019

J Quaternary Science

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Five cores from the southern Tyrrhenian and Ionian seas were studied for their tephra and cryptotephra content in the 4.4-2.0 ka time interval. The chronological framework for each core was obtained by accelerator mass spectrometry 14 C dating, the occurrence of distinct marker tephra and stratigraphic correlation with adjacent records. Tephrochronology allowed us to correlate the analyzed deposits with tephra markers associated with Somma-Vesuvius (79 AD), Ischia Island (Cretaio), Mt Etna (FG, FL and FS) and Campi Flegrei (Astroni-Agnano Monte Spina) events. For the first time in the marine setting, a large single glass data set is provided for the Late Holocene Etnean marker beds including the FS tephra (ca. 4.3 ka). Moreover, unknown deposits from Lipari (ca. 2.2-2.0 ka) and Vulcano (3.6-3.3 ka) are also recognized at more distal sites than previously reported. These results contribute to improve the high-resolution tephrostratigraphic framework of the central Mediterranean Sea. They also provide new insights into the chemical composition and dispersal pattern of tephras that can be used as inter-archive tools for regional and 'local' stratigraphic correlations and for addressing paleoclimate research.

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Northeastern Ionian Sea: Palaeoceanographic variability over the last 22 ka

Cited by 45 publications

References 66 publications

Late Quaternary paleoenvironmental reconstruction and paleoclimatic implications of the Aegean Sea (eastern Mediterranean) based on paleoceanographic indexes and stable isotopes

Late Quaternary paleoenvironmental reconstruction and paleoclimatic implications of the Aegean Sea (eastern Mediterranean) based on paleoceanographic indexes and stable isotopes

Late Pleistocene Environmental Factors of the Aegean Region (Aegean Sea Including the Hellenic Arc) and the Identification of Potential Areas for Seabed Prehistoric Sites and Landscapes

The Late Holocene tephra record of the central Mediterranean Sea: Mapping occurrences and new potential isochrons for the 4.4–2.0 ka time interval

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