8 results on '"Sulpizio, Roberto"'
Number of results to display per page
Search Results
2. The environmental and evolutionary history of Lake Ohrid (FYROM/Albania): interim results from the SCOPSCO deep drilling project
- Author
-
Wagner, Bernd, Wilke, Thomas, Francke, Alexander, Albrecht, Christian, Baumgarten, Henrike, Bertini, Adele, Combourieu Nebout, Nathalie, Cvetkoska, Aleksandra, Dapos, Addabbo, Michele, Donders, Timme, H., Föller, Kirstin, Giaccio, Biagio, Grazhdani, Andon, Hauffe, Torsten, Holtvoeth, Jens, Joannin, Sebastien, Jovanovska, Elena, Just, Janna, Kouli, Katerina, Koutsodendris, Andreas, Krastel, Sebastian, Lacey, Jack, H., Leicher, Niklas, Leng, Melanie, J., Levkov, Zlatko, Lindhorst, Katja, Masi, Alessia, Mercuri, Anna, M., Nomade, Sebastien, Nowaczyk, Norbert, Panagiotopoulos, Konstantinos, Peyron, Odile, Reed, Jane M., Regattieri, Eleonora, Sadori, Laura, Sagnotti, Leonardo, Stelbrink, Björn, Sulpizio, Roberto, Tofilovska, Slavica, Torri, Paola, Vogel, Hendrik, Wagner, Thomas, Wagner Cremer, Friederike, Wolff, George, A., Wonik, Thomas, Zanchetta, Giovanni, Zhang, Xiaosen S., Institute for Geology & Mineralogy Cologne, Université de Cologne, Institut Jacques Monod (IJM (UMR_7592)), Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Università degli Studi di Firenze [Firenze], Histoire naturelle de l'Homme préhistorique (HNHP), Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Justus-Liebig-Universität Gießen (JLU), Laboratory of Palaeobotany and Palynology, Utrecht University [Utrecht], PaleoEnvironnements et PaleobioSphere (PEPS), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon, Institut Pierre Louis d'Epidémiologie et de Santé Publique (iPLESP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM), National and Kapodistrian University of Athens = University of Athens (NKUA | UoA), Paleoenvironmental Dynamics Group, Institute of Earth Sciences, Heidelberg University, Christian-Albrechts-Universität zu Kiel (CAU), NERC Isotope Geosciences Laboratory, British Geological Survey (BGS), Dipartimento di biologia ambientale, Università degli Studi di Roma 'La Sapienza' [Rome], Berkely Geochronology Center, GeoForschungsZentrum - Helmholtz-Zentrum Potsdam (GFZ), Laboratoire Chrono-environnement - UFC (UMR 6249) (LCE), Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), University of Hull [United Kingdom], Dipartimiento di Scienze della Terra, University of Pisa - Università di Pisa, Department of Vegetation Biology, Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Roma (INGV), Istituto Nazionale di Geofisica e Vulcanologia, CIRISIVU Dpto Geomineralogico, Università degli studi di Bari, Helmholtz Centre for Environmental Research (UFZ), Technische Universität Dresden (TUD), Institute of Biochemistry and Molecular Medicine, University of Bern, Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Université de Perpignan Via Domitia (UPVD), Laboratoire Chrono-environnement - CNRS - UBFC (UMR 6249) (LCE), Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement [Lyon] (LGL-TPE), Université de Lyon-Université de Lyon-École normale supérieure - Lyon (ENS Lyon), Institut des Sciences de l'Evolution de Montpellier (UMR ISEM), École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre National de la Recherche Scientifique (CNRS)-Institut de recherche pour le développement [IRD] : UR226, Centre de l'Asthme et des Allergies [CHU Trousseau], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-CHU Trousseau [APHP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Sorbonne Université (SU), Laboratorio di Palinologia e Paleobotanica, Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Paléocéanographie (PALEOCEAN), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome], Università degli studi di Bari Aldo Moro (UNIBA), Helmholtz Zentrum für Umweltforschung = Helmholtz Centre for Environmental Research (UFZ), Water and Earth System Science Competence Cluster (WESS), Max Planck Institute for Chemistry (MPIC), Max-Planck-Gesellschaft, Bruegel, affiliation inconnue, Dipartimento di Scienze della Terra [Pisa], Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)-Université de Perpignan Via Domitia (UPVD), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Maison des Sciences de l'Homme et de l'Environnement Claude Nicolas Ledoux (MSHE), Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-CHU Trousseau [APHP], Histoire naturelle de l'Homme préhistorique ( HNHP ), Muséum National d'Histoire Naturelle ( MNHN ) -Université de Perpignan Via Domitia ( UPVD ) -Centre National de la Recherche Scientifique ( CNRS ), Institut des Sciences de l'Evolution de Montpellier ( ISEM ), Université de Montpellier ( UM ) -Institut de recherche pour le développement [IRD] : UR226-Centre National de la Recherche Scientifique ( CNRS ), Institut Pierre Louis d'Epidémiologie et de Santé Publique ( iPLESP ), Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ), Assistance publique - Hôpitaux de Paris (AP-HP)-CHU Trousseau [APHP], Christian-Albrechts-Universität zu Kiel ( CAU ), Università degli Studi di Modena e Reggio Emilia [Reggio Emilia] ( UNIMORE ), GeoForschungsZentrum - Helmholtz-Zentrum Potsdam ( GFZ ), Laboratoire Chrono-environnement ( LCE ), Université Bourgogne Franche-Comté ( UBFC ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Franche-Comté ( UFC ), University of Hull (UNITED KINGDOM), Università di Pisa, Helmholtz Centre for Environmental Research ( UFZ ), Water and Earth System Science Competence Cluster ( WESS ), Max Planck Institute for Chemistry ( MPIC ), Dipartimento di Scienze della Terra ( Università di Pisa ), Università degli Studi di Firenze = University of Florence [Firenze], Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN), Universität Bern [Bern] (UNIBE), Università degli Studi di Firenze = University of Florence (UniFI), Muséum national d'Histoire naturelle (MNHN)-Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Chrono-environnement (UMR 6249) (LCE), Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement (LGL-TPE), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Institut de recherche pour le développement [IRD] : UR226-Centre National de la Recherche Scientifique (CNRS), CHU Trousseau [APHP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome] (UNIROMA), Università degli studi di Bari Aldo Moro = University of Bari Aldo Moro (UNIBA), Coastal dynamics, Fluvial systems and Global change, Palaeoecology, Palaeo-ecologie, Centre National de la Recherche Scientifique ( CNRS ) -Université de Perpignan Via Domitia ( UPVD ) -Muséum National d'Histoire Naturelle ( MNHN ), Université Bourgogne Franche-Comté ( UBFC ) -Université de Franche-Comté ( UFC ) -Centre National de la Recherche Scientifique ( CNRS ), Maison des Sciences de l'Homme et de l'Environnement Claude Nicolas Ledoux ( MSHE ), Centre National de la Recherche Scientifique ( CNRS ) -Université de Franche-Comté ( UFC ), Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement [Lyon] ( LGL-TPE ), École normale supérieure - Lyon ( ENS Lyon ) -Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ), Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN), École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École pratique des hautes études (EPHE), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), UMR 7194 Histoire naturelle de l'Homme préhistorique (HNHP), and Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)-Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)
- Subjects
[ SDU.OCEAN ] Sciences of the Universe [physics]/Ocean, Atmosphere ,010504 meteorology & atmospheric sciences ,Pleistocene ,Environmental change ,Lake Ohrid ,Evolution ,[SDE.MCG]Environmental Sciences/Global Changes ,lcsh:Life ,Climate change ,580 Plants (Botany) ,010502 geochemistry & geophysics ,01 natural sciences ,Ecology, Evolution, Behavior and Systematics ,Earth-Surface Processes ,Behavior and Systematics ,lcsh:QH540-549.5 ,[ SDU.ENVI ] Sciences of the Universe [physics]/Continental interfaces, environment ,ecology ,evolution ,behavior and systematics ,earth-surface processes ,Glacial period ,Tephra ,Paleoclimatology ,[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment ,550 Earth sciences & geology ,ComputingMilieux_MISCELLANEOUS ,0105 earth and related environmental sciences ,[SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere ,Ecology ,lcsh:QE1-996.5 ,15. Life on land ,lcsh:Geology ,lcsh:QH501-531 ,Oceanography ,climate variation, environmental change, glacial-interglacial cycle, Quaternary, Lake Ohrid, Macedonia [Southern Europe] ,13. Climate action ,Interglacial ,Deed drilling ,Physical geography ,Tephrochronology ,lcsh:Ecology ,Quaternary ,Geology - Abstract
This study reviews and synthesises existing information generated within the SCOPSCO (Scientific Collaboration on Past Speciation Conditions in Lake Ohrid) deep drilling project. The four main aims of the project are to infer (i) the age and origin of Lake Ohrid (Former Yugoslav Republic of Macedonia/Republic of Albania), (ii) its regional seismotectonic history, (iii) volcanic activity and climate change in the central northern Mediterranean region, and (iv) the influence of major geological events on the evolution of its endemic species. The Ohrid basin formed by transtension during the Miocene, opened during the Pliocene and Pleistocene, and the lake established de novo in the still relatively narrow valley between 1.9 and 1.3 Ma. The lake history is recorded in a 584 m long sediment sequence, which was recovered within the framework of the International Continental Scientific Drilling Program (ICDP) from the central part (DEEP site) of the lake in spring 2013. To date, 54 tephra and cryptotephra horizons have been found in the upper 460 m of this sequence. Tephrochronology and tuning biogeochemical proxy data to orbital parameters revealed that the upper 247.8 m represent the last 637 kyr. The multi-proxy data set covering these 637 kyr indicates long-term variability. Some proxies show a change from generally cooler and wetter to drier and warmer glacial and interglacial periods around 300 ka. Short-term environmental change caused, for example, by tephra deposition or the climatic impact of millennial-scale Dansgaard–Oeschger and Heinrich events are superimposed on the long-term trends. Evolutionary studies on the extant fauna indicate that Lake Ohrid was not a refugial area for regional freshwater animals. This differs from the surrounding catchment, where the mountainous setting with relatively high water availability provided a refuge for temperate and montane trees during the relatively cold and dry glacial periods. Although Lake Ohrid experienced significant environmental change over the last 637 kyr, preliminary molecular data from extant microgastropod species do not indicate significant changes in diversification rate during this period. The reasons for this constant rate remain largely unknown, but a possible lack of environmentally induced extinction events in Lake Ohrid and/or the high resilience of the ecosystems may have played a role.
- Published
- 2017
3. Vegetation, climate and environmental history of the last 4500 years at lake Shkodra (Albania/Montenegro).
- Author
-
Sadori, Laura, Giardini, Marco, Gliozzi, Elsa, Mazzini, Ilaria, Sulpizio, Roberto, van Welden, Aurelien, and Zanchetta, Giovanni
- Subjects
CLIMATE change ,GLOBAL environmental change ,PALYNOLOGY ,VOLCANIC ash, tuff, etc. - Abstract
Three parallel overlapping cores have been taken in the Albanian side of Lake Shkodra (Albania/Montenegro). The chronological frame of the record, spanning approximately the last 4500 years, has been assessed using four radiocarbon dates and four well-known tephra layers of Italian volcanoes. Multidisciplinary analyses turned out to be decisive to understand environmental, climatic changes and human impact. Here, we focus on palynology. The humidity at Shkodra was always enough to allow the developing of a luxuriant arboreal vegetation. The pollen percentage diagram does not record important changes in terrestrial plants percentages. Arboreal pollen (AP) shows only a rather slight decrease, with ‘natural forests’ replaced by intensive cultivation of chestnut and walnut in the last seven/eight centuries. The rather minimal changes in composition and dominance are because of the fact that the pollen rain comes from different vegetation belts, from the Mediterranean to the alpine one. Two major periods of humidity are found, one at the base of the pollen concentration and influx diagram, before 4100 yr BP, the other at 1300 yr BP. Minima in pollen influx and concentration occurred soon before 4000, at ca. 2900 and at ca. 1450 yr BP These minima, interpreted as aridity crises, show a temporal coincidence with the so-called Bond events 1-3 already found in other central and eastern Mediterranean records. The minimum in AP occurring after 500 yr BP could represent the record of the ‘Little Ice Age’, even if it could be the effect of a strong land use. [ABSTRACT FROM PUBLISHER]
- Published
- 2015
- Full Text
- View/download PDF
4. Constraining the onset of the Holocene “Neoglacial” over the central Italy using tephra layers
- Author
-
Zanchetta, Giovanni, Giraudi, Carlo, Sulpizio, Roberto, Magny, Michel, Drysdale, Russell N., and Sadori, Laura
- Subjects
HOLOCENE Epoch ,VOLCANIC ash, tuff, etc. ,SEDIMENTATION & deposition ,CLIMATE change ,PALEOCLIMATOLOGY - Abstract
Abstract: A study of six tephra layers discovered in different deposits between 1600 and 2700ma.s.l. in the Apennine chain in central Italy allowed precise stratigraphic constraints on environmental and climatic changes between ca. 4.5 and 3.8calka BP. Chemical analyses allowed the correlation of these tephra layers with the eruptions of Agnano Mt Spina (AMST) from Phlegrean Field and Avellino (AVT) from Somma–Vesuvius. Major environmental changes in the high mountains of the Central Apennines occurred just after the deposition of the AMST and predate the deposition of the AVT. At this time, renewed growth of the Calderone Glacier occurred, marking the onset of the Apennine “Neoglacial”. The presence of the AMST and AVT enabled us to make a precise, physical correlation with other archives in central Italy. Synchronization of records between sites showed that the period intervening the deposition of the AMST and AVT layers coincided with environmental changes that were not always exactly in phase. This highlights the fact that stratigraphic correlations using only radiocarbon chronologies (the most common method used for dating archives during the Holocene) could produce erroneous correlation of events, giving rise to oversimplified paleoclimatic reconstructions. [Copyright &y& Elsevier]
- Published
- 2012
- Full Text
- View/download PDF
5. Tephrostratigraphy, chronology and climatic events of the Mediterranean basin during the Holocene: An overview.
- Author
-
Zanchetta, Giovanni, Sulpizio, Roberto, Roberts, Neil, Cioni, Raffaello, Eastwood, Warren J., Siani, Giuseppe, Caron, Benoît, Paterne, Martine, and Santacroce, Roberto
- Subjects
- *
SEDIMENTARY basins , *HOLOCENE paleoclimatology , *CLIMATE change , *MEDITERRANEAN climate , *VOLCANIC ash, tuff, etc. - Abstract
The identification and characterisation of high-frequency climatic changes during the Holocene requires natural archives with precise and accurate chronological control, which is usually difficult to achieve using only 14C chronologies. The presence of time-spaced tephra beds in Quaternary Mediterranean successions represents an additional, independent tool for dating and correlating different sedimentary archives. These tephra layers are potentially useful for resolving long-standing issues in paleoclimatology and can help towards correlating terrestrial and marine paleoclimate archives. Known major tephras of regional extent derive from central and southern Italy, the Hellenic Arc, and from Anatolia. A striking feature of major Holocene tephra deposition events in the Mediterranean is that they are clustered rather than randomly distributed in time. Several tephra layers occurred at the time of the S1 sapropel formation between c. 8.4 and 9.0 ka BP (Mercato, Gabellotto-Fiumebianco/E1, Cappadocia) and other important tephra layers (Avellino, Agnano Monte Spina, ‘Khabur’ and Santorini/Thera) occurred during the second and third millennia BC, marking an important and complex phase of environmental changes during the mid- to late-Holocene climatic transition. There is great potential in using cryptotephra to overlap geographically Italian volcanic ashes with those originating from the Aegean and Anatolia, in order to connect regional tephrochronologies between the central and eastern Mediterranean. [ABSTRACT FROM AUTHOR]
- Published
- 2011
- Full Text
- View/download PDF
6. Development of Pleistocene Fluvial Terraces on the Eastern Frontal Sector of the Southern Apennines Chain, Italy.
- Author
-
Giannandrea, Paolo, Giano, Salvatore Ivo, and Sulpizio, Roberto
- Subjects
FLUVIAL geomorphology ,TERRACING ,VALLEYS ,CLIMATE change - Abstract
The investigation of Pleistocene fluvial terraces in the small river valley of the Pescogrosso Stream and surrounding areas has shown a complex and positive location for the study of a fluvial catchment development. The Pescogrosso Stream is a left tributary of the Sinni River and is placed on the eastern front of the fold-and-thrust belt of the southern Apennine chain of Italy. Sedimentological and geomorphological analyses of eight fluvial terraced units revealed that their formation and evolution were strictly controlled by regional tectonic uplift of the Ionian arc, by climatic changes, and by sea-level variations. In particular, the Ionian sea-level oscillations, as a factor in controlling the short-term fluvial terrace development, was the main factor responsible for the three older terraces' evolutions. Conversely, the evolution of the five younger terraces seems to have been controlled by the base-level variations of the Sinni River. Finally, the matching of much information derived from regional and local tectonics, the plot of longitudinal terrace profiles, and the application of a sequence-stratigraphic approach to fluvial depositional sequences allowed the recognition of three evolutionary stages of development in the Pescogrosso fluvial incised-valley system during Pleistocene times. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
7. Revisiting the Y-3 tephrostratigraphic marker: a new diagnostic glass geochemistry, age estimate, and details on its climatostratigraphical context.
- Author
-
Albert, Paul G., Hardiman, Mark, Keller, Jörg, Tomlinson, Emma L., Smith, Victoria C., Bourne, Anna J., Wulf, Sabine, Zanchetta, Giovanni, Sulpizio, Roberto, Müller, Ulrich C., Pross, Jörg, Ottolini, Luisa, Matthews, Ian P., Blockley, Simon P.E., and Menzies, Martin A.
- Subjects
- *
STRATIGRAPHIC geology , *VOLCANIC ash, tuff, etc. , *SYNCHRONIZATION , *CLIMATE change , *GEOCHEMISTRY , *BAYESIAN analysis - Abstract
The ‘Y-3’ tephra is a crucial stratigraphic marker within the central Mediterranean region that falls close to the Marine Isotope Stage 3/2 transition and a cooling event proposed as a correlative of the North Atlantic Heinrich Stadial 3 (HS3). Consequently, this tephra offers great potential to assess any leads and lags in environmental responses to this abrupt climatic transition. New grain-specific glass analysis (EMPA and LA-ICP-MS) of the type locality Y-3 tephra recorded in the Ionian Sea confirms its origin from Campi Flegrei (CF) but reveals that it is compositionally different from the previously suggested proximal equivalent the VRa eruptive unit (Verdolino Valley, CF). Consequently, the 40 Ar/ 39 Ar age of the VRa should not be exported distally to the Y-3 tephra. Instead, we propose a new robust age for the Y-3 tephra following its identification in the Tenaghi Philippon sedimentary record, NE Greece. A Bayesian-based 14 C age model from Tenaghi Philippon provides a distal age of 28,680–29,420 cal yrs BP for the Y-3 tephra. The identification of this tephra in NE Greece markedly extends its known eastern dispersal. Whilst its stratigraphic position falls within the latter part of a period of low tree pollen percentages related to dry stadial conditions. This new age and environmental context suggest that this marker postdates the onset of HS3 in the eastern Mediterranean region by ∼2300 years. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
8. Climate and environmental change in the Balkans over the last 17 ka recorded in sediments from Lake Prespa (Albania/F.Y.R. of Macedonia/Greece)
- Author
-
Aufgebauer, Anne, Panagiotopoulos, Konstantinos, Wagner, Bernd, Schaebitz, Frank, Viehberg, Finn A., Vogel, Hendrik, Zanchetta, Giovanni, Sulpizio, Roberto, Leng, Melanie J., and Damaschke, Magret
- Subjects
- *
CLIMATE change , *SEDIMENTS , *SEDIMENTOLOGY , *GEOCHEMISTRY , *CLIMATOLOGY - Abstract
Abstract: This paper presents sedimentological, geochemical, and biological data from Lake Prespa (Albania/Former Yugoslav Republic of Macedonia/Greece). The 320 cm core sequence (Co1215) covers the last 17 ka calBP and reveals significant change in climate and environmental conditions on a local and regional scale. The sediment record suggests typical stadial conditions from 17.1 to 15.7 ka calBP, documented through low lake productivity, well-mixed conditions, and cold-resistant steppe catchment vegetation. Warming is indicated from 15.7 ka calBP with slightly increased in-lake productivity, gradual expansion of trees, and decreasing erosion through disappearance of local ice caps. Between 14.5 and 11.5 ka calBP relatively stable hydrological conditions are documented. The maximum in tree taxa percentages during the Bølling/Allerød interstadial (14.5–13.2 ka calBP) indicates increased temperatures and moisture availability, whereas the increase of cold-resistant open steppe vegetation taxa percentages during the Younger Dryas (13.2–11.5 ka calBP) is coupled with distinct colder and drier conditions. The Holocene sequence from 11.5 ka calBP indicates ice-free winters, stratification of the water column, a relatively high lake trophic level and dense vegetation cover over the catchment. A strong climate related impact on the limnology and physical parameters in Lake Prespa is documented around 8.2 ka through a significant decrease in productivity, enhanced mixing, strong decomposition and soil erosion, and a coeval expansion of herbs implying cool and dry climate conditions. Intensive human activity in the catchment is indicated from around 1.9 ka calBP. This multiproxy approach improves our understanding of short- and long-term climate fluctuations in this area and their impact on catchment dynamics, limnology, hydrology, and vegetation. [Copyright &y& Elsevier]
- Published
- 2012
- Full Text
- View/download PDF
Catalog
Books, media, physical & digital resources
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.